Cycle X Camshafts

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.

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 1.700 ish.

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 1.455 ish.

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 (1.455 ish) 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

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 world wide.
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 (1.455 ish) 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

Disclaimer:
The values, specifications, spring pressures and clearances listed above and below are a good start to your Honda CB750 go-fast project. Results may vary.

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:

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.

CX-3 $239.95

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:

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.

CX-4 $239.95

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.

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.

VERY LIMITED STOCK. One left available!

CX-5 $227.00

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.

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.

Additional tech info coming soon.

XXX-4 $299.00

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.
Hard welded.
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
EXHAUST VALVE SIZE
LASH	0 lash for checking.
INTAKE SINK
EXHAUST SINK
VALVE TO VALVE CLEARANCE
SPRINGS
INSTALLED HEIGHT	Check above.
VALVE STEM PROTRUSION
VALVE GUIDES	High lift guides are needed with the CX-10

NOTES:

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 st6em 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.

Additional tech info coming soon.

CX-10 $299.00

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):	.004"	.005"
VALVE LIFT (INCH):	0.385	0.330
DURATION @ 0.050:	256°	265°
LOBE CENTER:	109°	110°

INTAKE OPENS 19° BEFORE TDC	EXHAUST OPENS 62.5° BEFORE BDC
INTAKE CLOSES 57° AFTER BDC	EXHAUST CLOSES 22.5° 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	K model
YEAR	69-78 (69-76 K model valves)
CAMSHAFT	CX-11
INTAKE VALVE SIZE
EXHAUST VALVE SIZE
LASH
INTAKE SINK
EXHAUST SINK
VALVE TO VALVE CLEARANCE
SPRINGS
INSTALLED HEIGHT
VALVE STEM PROTRUSION
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 $299.00

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.

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.

Additional tech info coming soon.

CX-7 $239.95
Cycle X Race Team Approved

This "Hellcat" camshaft is the latest addition to our specialty performance camshaft options.
Made with a nice combination of old Honda CB750 camshaft thoughts and modern camshaft technology thoughts and theory.
Big bore and higher compression recommended.

INSTALLATION INFORMATION

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

	INTAKE	EXHAUST
VALVE LASH (INCH):	.004"	.005"
VALVE LIFT (INCH):	0.400	0.400
DURATION @ .0.050":	263°	263°
LOBE CENTER:	110°	117°

INTAKE OPENS 21.5° BEFORE TDC	EXHAUST OPENS 68.5° BEFORE BDC
INTAKE CLOSES 61.5° AFTER BDC	EXHAUST CLOSES 14.5° 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

Additional tech info coming soon.

CX-HELLCAT $299.00
Cycle X Race Team Approved

This "Hellcat 2" camshaft is the latest addition to our specialty performance camshaft options.
Check out the specifications on this camshaft to keep you go-fast people ahead of the competition.

INSTALLATION INFORMATION

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

	INTAKE	EXHAUST
VALVE LASH (INCH):	.004"	.005"
VALVE LIFT (INCH):	0.396	0.400
DURATION @ .0.050":	276°	277°
LOBE CENTER:	110.5°	106.5°

INTAKE OPENS 27.5° BEFORE TDC	EXHAUST OPENS 65° BEFORE BDC
INTAKE CLOSES 68.5° AFTER BDC	EXHAUST CLOSES 32° 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 2
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 2
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 2
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

Additional tech info coming soon.

CX-HELLCAT2 $299.00
Cycle X Race Team Approved

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

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.

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.

Honda had it right the first time (well, almost). Introducing the Cycle X version #2 racing cam chain tensioner. The geometry and design of the OEM Honda tensioner is perfect, except for the upper and lower wheels, which can disintegrate during racing applications and father time. Some of the slipper style designs in the past will cause problems with milled heads or cylinders, causing only the very top of the slider to make contact with the cam chain and the cam chain will also hit the lower metal pin (not good). By design, the lower wheel is very significant to keep the chain happy and stabile by applying slight pressure on both sides of the chain in the lower area of the case. Designs that eliminate the lower wheel can and will allow the cam chain to slap, bounce and whip in the worst case scenario. Also, without the use of the lower wheel, 8 inches or 25 chain link pins are unsupported. (In a perfect world, no more than 10 pins should be unsupported) The upper area of the Cycle X design uses a slipper shoe that adds over 4 inches of added support. So, with the combination of Honda's OEM design, Cycle X's battle tested ingenuity, and using the latest zero friction materials that are unaffected by heat, problem solved!

Note: The photo on the left shows the Cycle X tensioner in a full cut-away to show the supported chain links.

The option #2 cam chain full support tensioner features a gently curved front chain slider. (Yellow for visibility)
This gently curved front slider is a design that is used and required by performance minded people.
Most OEM over head cam designed motors have this curved feature.

Cycle X Manual Cam Chain Tensioner
Fine Thread Manual Tensioners and Gasket Combo

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.

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It is the sole and exclusive responsibility of the purchaser to determine the suitability of any part, product or work for his or her use.
The purchaser shall assume all legal, personal injury risk and liability and all other obligations, duties and risks therewith. There is no warranty on High Performance products.

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