Honda cb750 Camshafts and Related

 

If you're in need of tech help, refer to our camshaft tech tips page.

 

 

Honda SOHC High Performance Camshaft Details
 Camshafts always raise a lot of questions: What kind of performance do you expect? What kind of top end power do you expect?
What kind of riding do you do? What kind of valve relief do your pistons have?
Below are some camshaft profiles you will enjoy without the headaches that monster cams can produce without background and experience behind you.

(Click pics above for an expanded view)

Here is the problem...

With 11 Cycle X Honda CB750 camshafts and more to come, camshaft installation knowledge would be helpful to your machine shop and to the customer knowing what to buy. 

For example: Unless a "drop-in" camshaft is being installed. The machine shop or cylinder head assembler will need to know which camshaft is being used. Some of the most common heartbreak stories we hear from the public is that a customer had their head ported with oversize valves and all the latest, greatest parts and the valves collided because the the camshaft was chosen lastly. With most "big boy" camshafts, valve to valve clearance and also valve guide seal to top spring retainer clearances are very important but are taken for granted occasionally and a catastrophic situation occurs. The Cycle X high-lift valve guides prevent the top spring retainer from hitting and the valve guide seal from falling inside the keeper groove area of the valve stem and cause potential oil usage. We don't want to get long winded about the well documented procedures with cam clearances and installation procedures. So, here is what we are doing...

  • All of our camshafts will now have valve to valve clearances with stock size valves.
  • All valve to valve clearances with oversize valves with all the cams and how far to sink the valves.
  • All camshafts that will require "high-lift" valve guides.
  • Installed heights and spring pressures for those heights.
  • This knowledge will allow you to change camshafts for performance desires without possibly doing all the mathematics again.
  • This knowledge will allow you to keep the sinking of the valves to a minimum and losing precious flow numbers.

 


 

 

 

We will be referring to this measurement when preparing a cylinder head for sunken valves.
"Valve stem protrusion"
Note:
Valve stem protrusion on a stock cylinder head with stock valves is about 1.700ish.

This measurement is mainly referring to spring pressures.
"Installed height"
Note:
"Installed height" measurements specs will be seen on most valve spring packages. For reference, stock cylinder head, valves and spring installed height is 1.455ish.

This photo simply shows valve to valve measuring location when big camshafts, oversize valves or both are being considered.
"Valve to valve"
You will need a minimum of .040 valve to valve clearance.
 

Honda CB750 SOHC High Performance Valve Springs & Details

This section will provide some basic guidelines, spring pressure comparisons and recommendations for some of the larger camshafts listed below.
Installed heights and such are a good start. But, installed height seat lbs is what we are going to focus on right now.
Generally speaking, the goal is to have 75-90 lbs of seat pressure with most performance camshafts.

A small comparison:
Stock K model valve spring installed height (1.455ish) seat pressure lbs (no shims)
50 lbs
Stock 77-78 F model valve spring installed height (1.455ish) seat pressure lbs (no shims)
60 lbs

Valve weight will also be a factor in making spring pressure decisions.
These valve weights are for Cycle X valves:
F2 intake: 47.5 grams.
F2 exhaust: 47 grams.
K intake: 45.5 grams.
K exhaust: 41 grams.
K oversize 33.5 intake: 49 grams.
5mm Kibblewhite 34mm intake: 38 grams
5mm Kibblewhite std exhaust: 29 grams
 
Note:
Do not use OEM stock upper valve spring retainers with higher pressure springs and performance camshafts on 77-78 "F" super sport models.


 

 


 

High Performance Valve Springs
(K & F models)

These Kibblewhite valve springs are the most common valve springs used by Honda CB750 SOHC (69-78) owners for years and years.

Stock valve spring installed height (1.455ish) spring pressures with these Kibblewhite ENV-008 springs are:
65lbs (no shims)
80lbs (.060 copper shims)
180lbs @ 375 lift (no shims)
200lbs @ 375 lift (.060 copper shims)

Kit includes:
(8) .060 shims
(16) .015 shims

ENV-008     $69.95

 

 

 


 

Precision Valve Train Springs, Titanium Retainers and Matching Keepers.
Kit #1

These kits are the ultimate in precision and weight reduction.

Race proven and a must for higher RPM situations.
Check spring specs for your application below (ENV-009)
 

Kit includes:
Titanium top spring retainers.
Precision matching keepers.
High lift Cycle X / Kibblewhite spring set. (ENV-009)


ENV-KIT1     $290.00


 

 

 

 


 

Precision Valve Train Springs, Titanium Retainers and Matching Keepers.
Kit #2

Same as above at a reduced price.
Check spring specs for your application below (ENV-008) 


Kit includes:
Titanium top spring retainers.
Precision matching keepers.
High lift Cycle X / Kibblewhite spring set. (ENV-008)



ENV-KIT2    $250.00


 

 

 

 


 

Precision Valve Train Springs, Titanium Retainers, Titanium Adjuster Jam Nuts and Matching Keepers.
Kit #3

This kit is upgraded with hard welded rocker arms.

Race proven by people who actually race!

Kit includes:
Hard welded rocker arms.
High lift valve springs.
Titanium top retainers.
Matching valve spring keepers.
Titanium adjuster jam nuts.

 Retail - $899.00


ENV-KIT3     $799.00

 

 

 

 


 

Precision Valve Train Springs, Titanium Retainers, Titanium Adjuster Jam Nuts and Matching Keepers.
Kit #4

This kit is upgraded with hard welded rocker arms.

Same as above at a reduced price.

Kit includes:
Hard welded rocker arms.
High lift valve springs.
Titanium top retainers.
Matching valve spring keepers.
Titanium adjuster jam nuts.

 Retail - $859.00


ENV-KIT4     $759.00

 

 

 

 

 


 

High Performance Valve Springs for Large Camshafts (K & F models)

 These Cycle X, Kibblewhite valve springs are the favorite around here and with many pros worldwide. They are used exclusively when high-lift cams require valve sinking for valve to valve clearances. The reason these springs are used is they will not require piles of spring shims to get desired pressures.

So, stock valve spring installed height (1.455ish) spring pressures with Cycle X, Kibblewhite ENV-009 springs are:
85lbs (no shims)
90lbs (.015 shim)
105lbs (.060 shim)
75lbs with .030 sunken valves (K & F models)

Kit includes:
(8) .060 shims
(16) .015 shims

ENV-009     $109.00

 

 

 

 

The Highest Level Bee-Hive Valve Springs

These bee hive spring sets are manufactured by Kibblewhite for Cycle X years ago and are installed in some of the fastest Hondas worldwide. Combined with titanium rocker arm adjustor jam nuts and lightened rocker arms. You will have the best current valve train combination available.
Well, combine the 5mm valve kit to have the ultimate combination.
Installed height: 1.370 - 1.380.
Seat pressure: 90-95lbs.
Open pressure at 0.460 lift: 220lbs
Max lift: 0.460.
Specify "K" or "F" model.

ENV-010K for "K" models     $239.00


ENV-010F for 77-78 "F" models     $239.00


ENV-010-5MM for Kibblewhite 5mm kits     $239.00

 

 

 

 

 

 

 

 

 

(77-78) Honda CB750 F2, F3 Valve Spring and Retainer Combo

These Cycle X, Kibblewhite valve springs are the favorite around here and with many pros worldwide. They are used exclusively when high-lift cams require valve sinking for valve to valve clearances. The reason these springs are used is they will not require piles of spring shims to get desired pressures. So, stock valve spring installed height (1.455ish) spring pressures with Cycle X, Kibblewhite ENV-009 springs are:
85lbs (no shims)
90lbs (.015 shim)
105lbs (.060 shim)
75lbs with .030 sunken valves (K & F models)

Caution:
Honda CB750 77-78 K's and especially F2's have the potential of the keepers pulling through the top spring retainers and dropping the valve into the motor. Many people have felt this heartbreak for the past 30+ years. Honda's later model spring retainers are stamped steel, combined with a steep keeper angle, has only been addressed by complete spring kits costing hundreds of dollars, until now.

 We have been working with Kibblewhite and have developed these top retainers to cure this problem once and for all at a reduced cost. Heat is a problem in the F2 valve tranes, these new lightweight top spring retainers feature 8 holes on the top of the retainer. The purpose for these holes is to allow oil to drip down the springs to help with heat dispersion. Keep in mind, oil lubricates, picks up heat and carries it away to coolers and such. People in NASCAR use the same technique and it helps keep the valves well lubricated for longer life. These retainers are made from heat treated carbon steel for durability and strength. 11.25 grams per retainer!

ENV-011     Combo - $210.00

 

ENV-F2R     Retainers only - $119.00

 

 

 

Budget High Performance F2, F3 Spring and Top Retainer Combo

This high performance combo kit is similar to above, but a budget version. This kit includes ENV-008 and ENV-011.

Kit includes:
(8) .060 shims
(16) .015 shims

ENV-013     $178.00

 

 

 

 

 

 

Under construction. More tech info coming soon.
For Advice Please Call (715) 356-7346

 

Camshafts


CX-1B CAMSHAFT
 

INSTALLATION INFORMATION

This CX-1-B is a true "Drop-in" camshaft that can be installed like a stock camshaft using stock camshaft procedures in your manual.
No valve to valve or valve to piston checking needed.
These "drop-in" camshafts are the easiest to install and are the best bang-for-the-buck when it comes to performance upgrades. Similar performance characteristics to the CX-1.
Note:
We have included a refurbished slotted cam chain sprocket and Honda flanged bolts for added support.
These OEM refurbished/slotted sprockets are included to get your camshaft marks lined up perfectly. Cam chain stretch, milled cylinders and heads, different cylinder and head gasket thicknesses will never allow the camshaft marks to line up perfectly .... now they will.  
  

ENGINE:  Honda CB750 F2 (77-78); CB750 K (69-78) SOHC 8V

  INTAKE EXHAUST
VALVE LASH (INCH): .004" .005"
VALVE LIFT (INCH): 0.328 0.312
DURATION @ .0.050": 228 233
     
 

VALVE TIMING IS CHECKED WITH ZERO VALVE LASH @ 0.050 INCHES OF VALVE LIFT.
 $334.00

 


 

Drop-in Camshaft

No valve to valve or valve to piston checking needed.

Kenny Harman "D" grind. OK with stock pistons. Use HD springs. Mid-range and some top-end.
Longer exhaust duration allows for cooler combustion chambers.

INSTALLATION INFORMATION

ENGINE:  Honda CB750 F (75-76); CB750 F (77-78)  CB750 K (69-78) SOHC 8V

 

INTAKE

EXHAUST

VALVE LASH (INCH):

.004"

.005"

VALVE LIFT (INCH):

0.345

0.327

DURATION @ .0.050":

277°

294°

LOBE CENTER:

106.5°

110°
 

INTAKE OPENS     32°     BEFORE TDC

EXHAUST OPENS     77°     BEFORE BDC

INTAKE CLOSES     65°     AFTER BDC

EXHAUST CLOSES     37°     AFTER TDC

VALVE TIMING IS CHECKED WITH ZERO VALVE LASH @ 0.050 INCHES OF VALVE LIFT.
NOTE: This camshaft is considered a drop-in or a bolt-in grind.
Valve to valve, Valve to piston, Valve drop at TDC and all the other performance checks and procedures are generally not needed.
 
"Generally" not needed?
 
Well, if someone has milled the head or cylinder, used bigger intake and exhaust valves, used stock pistons, used thinner gaskets and such, checking will be needed.
 

UNAVAILABLE

 

Drop-in Camshaft

No valve to valve or valve to piston checking needed.

Broad power range. This cam will bolt right in stock engines. You will notice good power increase with this one. This camshaft profile was used on tight road-race tracks. You will like it. Made for Cycle X by Web Cam. Equivalent to their 41 Cam.

INSTALLATION INFORMATION

ENGINE:  Honda CB750 F (75-76); CB750 F 77-78) CB750 K (69-78) SOHC 8V

 

INTAKE

EXHAUST

VALVE LASH (INCH):

.004"

.005"

VALVE LIFT (INCH):

0.340

0.340

DURATION @ .0.050":

229°

229°

LOBE CENTER:

103°

103°
 

INTAKE OPENS     11.5°     BEFORE TDC

EXHAUST OPENS     37.5°     BEFORE BDC

INTAKE CLOSES     37.5°     AFTER BDC

EXHAUST CLOSES     11.5°     AFTER TDC

VALVE TIMING IS CHECKED WITH ZERO VALVE LASH @ 0.050 INCHES OF VALVE LIFT.

NOTE: This camshaft is considered a drop-in or a bolt-in grind.

Valve to valve, Valve to piston, Valve drop at TDC and all the other performance checks and procedures are generally not needed.

"Generally" not needed?

Well, if someone has milled the head or cylinder, used bigger intake and exhaust valves, used stock pistons, used thinner gaskets and such, checking will be needed.

UNAVAILABLE

Drop-in Camshaft

No valve to valve or valve to piston checking needed.

Need a little more power? We have used this camshaft profile in stock displacement motors but check carefully. Works well with 836cc kits. Made for Cycle X by Web Cam. Equivalent to a 41A.

INSTALLATION INFORMATION

ENGINE:  Honda CB750 F (75-76); Cb750 F (77-78) CB750 K (69-78) SOHC 8V

 

INTAKE

EXHAUST

VALVE LASH (INCH):

.004"

.005"

VALVE LIFT (INCH):

0.345

0.345

DURATION @ .0.050":

235°

235°

LOBE CENTER:

95.5°

99.5°*

* = 97.5° overall

 

INTAKE OPENS     22°     BEFORE TDC

EXHAUST OPENS     37°     BEFORE BDC

INTAKE CLOSES     33°     AFTER BDC

EXHAUST CLOSES     18°     AFTER TDC

VALVE TIMING IS CHECKED WITH ZERO VALVE LASH @ 0.050 INCHES OF VALVE LIFT.

NOTE: This camshaft is considered a drop-in or a bolt-in grind.

Valve to valve, Valve to piston, Valve drop at TDC and all the other performance checks and procedures are generally not needed.

"Generally" not needed?

Well, if someone has milled the head or cylinder, used bigger intake and exhaust valves, used stock pistons, used thinner gaskets and such, checking will be needed.

UNAVAILABLE

 

 

Here is a great cam for your 836cc hot street motor. Springs, big bore kit will be needed to utilize this cams potential. Made for Cycle X by Web Cam. Equivalent to a 63A.

INSTALLATION INFORMATION

ENGINE:  Honda CB750 F (75-76); CB750 K (69-78) SOHC 8V

 

INTAKE

EXHAUST

VALVE LASH (INCH):

.004"

.005"

VALVE LIFT (INCH):

0.355

0.355

DURATION @ .0.050":

251°

250°

LOBE CENTER:

98°

99°*

* = 98.5° overall

 

INTAKE OPENS     27.5°     BEFORE TDC

EXHAUST OPENS     44°     BEFORE BDC

INTAKE CLOSES     43.5°     AFTER BDC

EXHAUST CLOSES     26°     AFTER TDC

VALVE TIMING IS CHECKED WITH ZERO VALVE LASH @ 0.050 INCHES OF VALVE LIFT.
 

MAKE  
MODEL  
YEAR  
CAMSHAFT  
INTAKE VALVE SIZE  
EXHAUST VALVE SIZE  
LASH  
INTAKE SINK  
EXHAUST SINK  
VALVE TO VALVE CLEARANCE  
SPRINGS  
INSTALLED HEIGHT  
VALVE STEM PROTRUSION  
VALVE GUIDES  
NOTES:

 

MAKE  
MODEL  
YEAR  
CAMSHAFT  
INTAKE VALVE SIZE  
EXHAUST VALVE SIZE  
LASH  
INTAKE SINK  
EXHAUST SINK  
VALVE TO VALVE CLEARANCE  
SPRINGS  
INSTALLED HEIGHT  
VALVE STEM PROTRUSION  
VALVE GUIDES  
NOTES:

Additional tech info coming soon.
UNAVAILABLE

Strong mid and top end power for street-strip. Use with big bore, headers, and valve springs. Made for Cycle X by Web Cam.
Equivalent to a 63B.

INSTALLATION INFORMATION

ENGINE:  Honda CB750 F (75-76); CB750 K (69-78) SOHC 8V

 

INTAKE

EXHAUST

VALVE LASH (INCH):

.004"

.005"

VALVE LIFT (INCH):

0.345

0.345
ADVERTISED DURATION: 296° 296°

DURATION @ .0.050":

257°

260°

LOBE CENTER:

98°

98°
 

INTAKE OPENS     30.5°     BEFORE TDC

EXHAUST OPENS     48°     BEFORE BDC

INTAKE CLOSES     46.5°     AFTER BDC

EXHAUST CLOSES     32°     AFTER TDC

VALVE TIMING IS CHECKED WITH ZERO VALVE LASH @ 0.050 INCHES OF VALVE LIFT.
 

MAKE  
MODEL  
YEAR  
CAMSHAFT  
INTAKE VALVE SIZE  
EXHAUST VALVE SIZE  
LASH  
INTAKE SINK  
EXHAUST SINK  
VALVE TO VALVE CLEARANCE  
SPRINGS  
INSTALLED HEIGHT  
VALVE STEM PROTRUSION  
VALVE GUIDES  
NOTES:

 

MAKE  
MODEL  
YEAR  
CAMSHAFT  
INTAKE VALVE SIZE  
EXHAUST VALVE SIZE  
LASH  
INTAKE SINK  
EXHAUST SINK  
VALVE TO VALVE CLEARANCE  
SPRINGS  
INSTALLED HEIGHT  
VALVE STEM PROTRUSION  
VALVE GUIDES  
NOTES:

Additional tech info coming soon.

UNAVAILABLE

 




Upper midrange and top end camshaft. Use with big-bore, exhaust system and 12 plus compression ratio pistons.

INSTALLATION INFORMATION

ENGINE:  Honda CB750 F2 (75-76); CB750 K (69-78) SOHC 8V

 

INTAKE

EXHAUST

VALVE LASH (INCH):

.004"

.005"

VALVE LIFT (INCH):

0.350

0.350

DURATION @ .0.050":

273°

273°

LOBE CENTER:

99°

99°
 

INTAKE OPENS     37.5°     BEFORE TDC

EXHAUST OPENS     55.5°     BEFORE BDC

INTAKE CLOSES     55.5°     AFTER BDC

EXHAUST CLOSES     37.5°     AFTER TDC

VALVE TIMING IS CHECKED WITH ZERO VALVE LASH @ 0.050 INCHES OF VALVE LIFT.

MAKE Honda CB750 SOHC
MODEL 69-78 K model
YEAR 69-78 with the preferred 69-76 valve keepers and valves.
CAMSHAFT CX-5
INTAKE VALVE SIZE 32mm standard.
EXHAUST VALVE SIZE 28mm standard.
LASH 0 lash
INTAKE SINK .020
EXHAUST SINK .020
VALVE TO VALVE CLEARANCE Averages .048 with 0 lash
SPRINGS ENV-008, ENV-009 and Bee-hives spring sets will work great.
   
VALVE STEM PROTRUSION 1.720
VALVE GUIDES High lift guides are needed
NOTES:
This is a high RPM camshaft.
Any time we use these high RPM camshafts with sunken valves 020 or more, we like ENV-009 or bee-hive spring sets.

 

MAKE Honda cb750 sohc
MODEL 69-78 K model.
YEAR 69-78 with preferred 69-76 valve keepers and valves.
CAMSHAFT CX-5
INTAKE VALVE SIZE 33.5 oversize intake valves.
EXHAUST VALVE SIZE 28mm standard exhaust valves.
LASH 0 lash
INTAKE SINK .030
EXHAUST SINK .030
VALVE TO VALVE CLEARANCE .030. ( .040 minimum is needed)  Check notes below.
SPRINGS ENV-009 or bee-hives
   
VALVE STEM PROTRUSION 1.730
VALVE GUIDES High lift
NOTES:
With this CX-5 high RPM long duration camshaft and 33.5 oversize intake valves, close attention to set-up is a must.
You will notice that the valve to valve clearance is in the danger zone. Sinking the valves a bit more and setting the running valve lash will help, but many builders do not want to sink more than .030.
One of the preferred methods to gain more valve to valve clearance without sinking more is reducing the outside diameter of the intake and maybe the exhaust valve on the lathe up to the lapping line on the valve face.
Recommend ENV-009 or bee-hive spring sets.

Additional tech info coming soon.

CX-5     $314.00

 

 

 

Specialty Camshafts


\
 

 

 

This camshaft is for drag race applications.
This is the biggest, baddest camshaft for Honda cb750 ever made.
Extensive head work will be needed and all clearances be checked.
Designed by Kenny Harman and used by some of the fastest Hondas in the olden days.

 This camshaft is bigger than billets will allow us to go. Therefore, they are only offered in hardweld only.

INSTALLATION INFORMATION

ENGINE:  Honda CB750 F (75-76); CB750 K (69-78) SOHC 8v - Special Base Circle

 

INTAKE

EXHAUST

VALVE LASH (INCH):

.006" - .008"

.008" - .010"

VALVE LIFT (INCH):

0.457

0.457

DURATION:

287°

291°

LOBE CENTER:

108.5°

107.5°
 

INTAKE OPENS     35°     BEFORE TDC

EXHAUST OPENS     73°     BEFORE BDC

INTAKE CLOSES     72°     AFTER BDC

EXHAUST CLOSES     38°     AFTER TDC

VALVE TIMING IS CHECKED WITH ZERO VALVE LASH @ 0.050 INCHES OF VALVE LIFT.

NOTES:
We will not be able to give any opinions or data for installing this XXX-4 in a Honda CB750 SOHC head. The camshaft is so big, a special head will need to be built especially for this camshaft.

VERY LIMITED STOCK. One left available!

XXX-4     $399.00


 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

This camshaft is one of our favorites for 890cc and bigger Honda CB750 race bikes. (12+ comp ratio or more)
This camshaft is perfect for road race or drag race applications.
Very similar to the Mega-cycle 125-X12, but with a 112 lobe center.
 This camshaft is bigger than billets will allow us to go. Therefore, they are only offered in hardweld only.
In stock.

INSTALLATION INFORMATION

ENGINE:  Honda CB750F2 (75-78); CB750K (69-78) SOHC 8v

 

INTAKE

EXHAUST

VALVE LASH (INCH):

.004"

.005"

VALVE LIFT (INCH):

0.420

0.430

DURATION:

258.5°

261°

LOBE CENTER:

109.75°

115.5°
 

INTAKE OPENS     19.5°     BEFORE TDC

EXHAUST OPENS     66°     BEFORE BDC

INTAKE CLOSES     59°     AFTER BDC

EXHAUST CLOSES     15°     AFTER TDC

VALVE TIMING IS CHECKED WITH ZERO VALVE LASH @ 0.050 INCHES OF VALVE LIFT.

 
MAKE Honda CB750 SOHC
MODEL K model
YEAR 69-78 (69-76 K model valves)
CAMSHAFT CX-10
INTAKE VALVE SIZE 32mm standard.
EXHAUST VALVE SIZE 28mm standard.
LASH 0 lash for checking.
INTAKE SINK No sink. 1.700 valve stem protrusion.
EXHAUST SINK No sink. 1.700 valve stem protrusion.
VALVE TO VALVE CLEARANCE .051 Average
SPRINGS ENV-008. 65lbs 1.455 installed height. no shims.
80lbs with 1.395 installed height (.060 shims)
ENV-009. 85lbs 1. 455 installed height. no shims. Add shims if needed.
Bee-hive ENV-010K 1.380 installed height. 90-95lbs. Add shims if needed.
INSTALLED HEIGHT Check above.
VALVE STEM PROTRUSION 1.700. Intake and exhaust.
VALVE GUIDES High lift guides are needed with the CX-10
NOTES:

 

MAKE Honda CB750 SOHC
MODEL F2/ F3 Supersport models
YEAR 77-78
CAMSHAFT CX-10
INTAKE VALVE SIZE 34mm standard
EXHAUST VALVE SIZE 31mm standard.
LASH 0 lash for checking.
INTAKE SINK .030
EXHAUST SINK .030
VALVE TO VALVE CLEARANCE  
SPRINGS  
INSTALLED HEIGHT  
VALVE STEM PROTRUSION 1.730. Intake and exhaust. (sunk .030)
VALVE GUIDES High lift guides are required.
NOTES:
More specs coming soon.
Cam tower clearancing will be needed.

UNAVAILABLE

 

This camshaft profile is one of the hardest hitting mid-range and excellent top-end camshafts designed for Honda CB750's.
Works great with 65mm bores and larger.
Higher compression ratios are recommended.
You vintage road racing people should try this cam!
 

INSTALLATION INFORMATION

ENGINE:  Honda CB750 F2 (75-76); CB750 K (69-78) SOHC 8v

 

INTAKE

EXHAUST

VALVE LASH (INCH):

.005"

.005"

VALVE LIFT (INCH):

0.385

0.330
DURATION: 290° 300°

DURATION @ .0.050":

264°

272°

LOBE CENTER:

107°

110°
 

INTAKE OPENS     25°     BEFORE TDC

EXHAUST OPENS     66°     BEFORE BDC

INTAKE CLOSES     59°     AFTER BDC

EXHAUST CLOSES     26°     AFTER TDC

VALVE TIMING IS CHECKED WITH ZERO VALVE LASH @ 0.050 INCHES OF VALVE LIFT.

MAKE Honda CB750 SOHC
MODEL K model
YEAR 69-78 (69-76 K model valves)
CAMSHAFT CX-11
INTAKE VALVE SIZE 32mm standard.
EXHAUST VALVE SIZE 28mm standard.
LASH 0 lash for checking.
INTAKE SINK No sink. 1.700 valve stem protrusion.
EXHAUST SINK No sink. 1.700 valve stem protrusion.
VALVE TO VALVE CLEARANCE .060 Average
SPRINGS ENV-008. 65lbs 1.455 installed height. no shims.
80lbs with 1.395 installed height (.060 shims)
ENV-009. 85lbs 1. 455 installed height. no shims. Add shims if needed.
Bee-hive ENV-010K 1.380 installed height. 90-95lbs. Add shims if needed.
INSTALLED HEIGHT Check above.
VALVE STEM PROTRUSION 1.700. Intake and exhaust.
VALVE GUIDES High lift guides are needed with the CX-11
NOTES:

 

MAKE Honda CB750 SOHC
MODEL F2/F3 Supersport models
YEAR 77-78
CAMSHAFT CX-11
INTAKE VALVE SIZE 34mm standard.
EXHAUST VALVE SIZE 31mm standard.
LASH 0 lash for checking.
INTAKE SINK .015 sink
EXHAUST SINK .015 sink
VALVE TO VALVE CLEARANCE . Averages .050 with o lash
SPRINGS All above springs will work. Check pressures and specs for your needs.
   
VALVE STEM PROTRUSION 1.715
VALVE GUIDES Standard or High-lift guides are okay.
NOTES:
More specs coming soon.
Cam tower clearancing will be needed.

Additional tech info coming soon.

CX-11     $314.00

 
 

 

Similar to the Mega Cycle 125-75 but with 3 more degrees of duration. We found this cam to work well with 915cc kits and above.

INSTALLATION INFORMATION

ENGINE:  Honda CB750 F2 (75-78); Honda CB750K (69-78) SOHC 8V

 

INTAKE

EXHAUST

VALVE LASH (INCH):

.004"

.005"

VALVE LIFT (INCH):

0.395

0.366

DURATION @ .0.050":

258°

252°

LOBE CENTER:

104.5°

106°
 

INTAKE OPENS     24.5°     BEFORE TDC

EXHAUST OPENS     52°     BEFORE BDC

INTAKE CLOSES     53.5°     AFTER BDC

EXHAUST CLOSES     20°     AFTER TDC

VALVE TIMING IS CHECKED WITH ZERO VALVE LASH @ 0.050 INCHES OF VALVE LIFT.

 

MAKE Honda CB750 SOHC
MODEL F2/F3 Supersport
YEAR 77-78
CAMSHAFT CX-7
INTAKE VALVE SIZE 34mm
EXHAUST VALVE SIZE 31mm
LASH 0 lash for checking
INTAKE SINK .015
EXHAUST SINK .015
VALVE TO VALVE CLEARANCE Averages .050 with 0 lash
SPRINGS Check above specs and pressures and favor 85 to 90lbs or more with this camshaft.
   
VALVE STEM PROTRUSION 1.715
VALVE GUIDES Standard or high lift
NOTES:
The intake and exhaust "ballpark" valve sink is .015 on our test head and valves. Sometimes you can achieve this small amount of sink by a basic valve job and adjusting your valve lash. Our 0 valve lash for testing is because some tuners will adjust running valve lash's to their own liking.
Cam tower clearances must be checked.
 


 

MAKE Honda CB750 SOHC
MODEL K model
YEAR 69-78 (69-76 K model valves)
CAMSHAFT CX-7
INTAKE VALVE SIZE 33.5mm oversize valves
EXHAUST VALVE SIZE 28mm standard exhaust
LASH 0 lash
INTAKE SINK  
EXHAUST SINK  
VALVE TO VALVE CLEARANCE  
SPRINGS  
   
VALVE STEM PROTRUSION  
VALVE GUIDES  
NOTES:


 

MAKE Honda CB750 SOHC
MODEL K model
YEAR 69-78 (69-76 K model valves)
CAMSHAFT CX-7
INTAKE VALVE SIZE 32mm standard
EXHAUST VALVE SIZE 28mm standard
LASH 0 lash
INTAKE SINK No sink 
EXHAUST SINK No sink
VALVE TO VALVE CLEARANCE .060
SPRINGS Check spring pressures and specs above. ENV-008, ENV-009 and Bee-hives will work great.
   
VALVE STEM PROTRUSION 1.700 average
VALVE GUIDES High lift guides are needed.
NOTES:
As you can see, there is plenty of valve to valve clearances with standard valve sizes and the CX-7 camshaft. Valve to piston and such will be next on your check list. 
 


UNAVAILABLE

 

These camshafts have a huge following with the Honda high performance world. Check out the specifications and you will see this cam is serious stuff. We love this cam on our big bore sleeper motors!

Limited supply!

INSTALLATION INFORMATION

ENGINE:  Honda CB750 F2 (75-78); CB750 K (69-78) SOHC 8V

 

INTAKE

EXHAUST

VALVE LASH (INCH):

.005"

.006"

VALVE LIFT (INCH):

0.430

0.430
DURATION: 292° 292°

DURATION @ .0.050":

270°

270°

LOBE CENTER:

108°

110°
 

INTAKE OPENS     27°     BEFORE TDC

EXHAUST OPENS     65°     BEFORE BDC

INTAKE CLOSES     63°     AFTER BDC

EXHAUST CLOSES     25°     AFTER TDC

VALVE TIMING IS CHECKED WITH ZERO VALVE LASH @ 0.050 INCHES OF VALVE LIFT.

MAKE Honda CB750 SOHC
MODEL K model
YEAR 69-78 (69-76 K model valves)
CAMSHAFT Hellcat
INTAKE VALVE SIZE 33.5mm oversize.
EXHAUST VALVE SIZE 28mm standard.
LASH 0 lash for checking.
INTAKE SINK  
EXHAUST SINK  
VALVE TO VALVE CLEARANCE  
SPRINGS  
INSTALLED HEIGHT  
VALVE STEM PROTRUSION  
VALVE GUIDES  
NOTES:


 

MAKE Honda CB750 SOHC
MODEL K model
YEAR 69-78 (69-76 K model valves)
CAMSHAFT Hellcat
INTAKE VALVE SIZE  
EXHAUST VALVE SIZE  
LASH  
INTAKE SINK  
EXHAUST SINK  
VALVE TO VALVE CLEARANCE  
SPRINGS  
INSTALLED HEIGHT  
VALVE STEM PROTRUSION  
VALVE GUIDES  
NOTES:


 

MAKE Honda CB750 SOHC
MODEL F2/F3 Supersport
YEAR 77-78
CAMSHAFT Hellcat
INTAKE VALVE SIZE 34mm
EXHAUST VALVE SIZE 31mm
LASH 0 lash for checking
INTAKE SINK .025
EXHAUST SINK .025
VALVE TO VALVE CLEARANCE Averages .055 with 0 lash
SPRINGS Check above specs and pressures and favor 85 to 90lbs or more with this camshaft.
   
VALVE STEM PROTRUSION 1.725
VALVE GUIDES Standard or high lift

CX-12-84     $314.00

 

 

 

CLICK HERE:  FOR INFO ON DEGREEING AND CAM INSTALLATION

 

 

Hardwelded Honda CB750 SOHC Rocker Arms

Hardwelded and precision ground from original equipment cores. These durable and long lasting rocker arms are important with high performance and even stock motor configurations. Many conversations are had with folks trying to make the flat tappet designs survive nowadays. Zinc and other and oil additives are being blended to help make these flat tappet motors live. On the other hand, hardwelded rocker arms are the best option. Recommended for use with all cam profiles, both billet and hardweld.

No core required. Outright sale.

For ALL year model CB750 SOHC 1969-78

ROCKER-ARMS     $492.00 (Set of 8)

 

 

 



Titanium Rocker Arm Jam Nut Set

These Titanium rocker arm jam nuts were used on our Vintage heavyweight Super Bike. They are now available for your go-fast Honda CB750 SOHC project. (69-78) 1.2 grams per nut.

ENV-321            $49.95

 

 

 

Cryo Treated Cam Chains (Greater)

ENV-013A    $89.00

 

 

Cryo Treated Enuma Cam Chains

Reliable and sturdy chains made in Japan.

ENV-014    $89.00

 

 

 

Tsubaki Cam Chains

Tsubaki cam chains have been known to be the best for decades.
Tsubaki has discontinued making these chains and many engine builders were freaking out. Well, no need to panic. We have a limited supply of these chains and we will also offer them in a cryo treated version. These cryo treated Tsubaki chains will clearly be the best chains ever offered to the Honda CB750 community.
Straight side plates.

ENG-TSUBAKI     $89.00

 

Cryogenically Treated Tsubaki
Cam Chains

These Tsubaki cam chains have been the best available for years and years, now that they have been Cryogenically treated with this proven process, they are truly the best available. No stretching, no resetting cam timing, and there has never been a reported failure even without the cryo treatments.

A Cycle X exclusive product!

ENG-TSUBAKICRYO     $113.25

 

Cryo Info
 These chains have gone through our cryogenic treatment, which involves taking the chains down to temperatures of minus 300 degrees Fahrenheit. What this does is rearranges the molecular structure of the item being treated, making them more uniform and evenly spread. Why is this good? Well, after this process is complete the item treated has increased tensile strength and resistance to wear.

In other words it makes stuff stronger and last longer!

 

“I used to have to adjust my Yamaha motorcycle chain after the first run because it would stretch. After cryo-treatment, the chains don't stretch at all, and the treatment also keeps cam chains from breaking. I haven't broken a chain since I started cryo-treating all of my parts.”
- Customer of Cryotreament

 

You will need these cam chain tensioners parts so your Honda SOHC does not sound like a wash machine.
These are Factory Replacements direct from Honda.

 

Cam Chain Roller

ENV-001    $24.95
 

 


 

Cam Chain Roller Assembly

ENV-002    $54.95
 

Cam Chain Slider

ENV-003    $23.00
 

 

 

OEM Adjustable Camshaft Sprockets

We all know why adjustable camshaft sprockets are used in the high performance world. But, stock motor configuration motors can benefit from these also. Have you ever tried to line up the camshaft marks after any sort of motor work or checking a few things? The marks usually never line up perfectly because of many reasons. One of the main reasons on a stock motor with any miles is cam chain stretch. The cam chain is like a rear chain. It stretches. So, install these modified poor man's adjustable OEM cam chain sprockets and realign your cam timing or install your performance cam.

CS-017A     $49.95
 

 

 

OEM Adjustable Camshaft Sprocket Combo

Our adjustable camshaft sprocket also comes with a set of shouldered bolts to compliment.

Note: These shouldered bolts are a great upgrade and a little insurance that the camshaft bolts do not move or slip when using higher spring pressures.
The shank area of these bolts can be a slightly bigger than the OEM bolt (about .010 only in most cases), so make sure the bolts fit nicely into the sprocket of your choice and camshaft of your choice before final tightening and torque is applied.
 

CS-017B     $59.95
 

 

Falicon Slotted Cam Chain Sprocket and Honda OEM Shouldered Bolts (New)

These Falicon slotted cam chain sprockets are new and preferred by many engine builders around the world.
Equally as important, these kits come with Honda OEM shouldered bolts.
Introductory priced at $45.99 per set.

Note: These kits are not just for high performance applications.
Why?

When cam chains stretch, cam chain rollers wear a bit, thinner head gaskets are used and heads/cylinders are milled you will need to adjust your cam timing marks to the original positions. By using these adjustable sprocket kits, the cam timing can be "bumped" back to the original position.

CS-017C     $65.99
 


  

Remanufactured (Slotted) Camshaft Sprockets

For the budget minded.
Slotted OEM camshaft sprockets.

While supplies last.

CS-017D     $39.95
 
 
 
 

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Cycle X Global Headquarters

6246 US Hwy 51 South

Hazelhurst, WI 54531

Phone: 715-356-7346

Email: hotrodcyclex@gmail.com

 

 

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