Honda cb750 Camshafts and Related

 

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

 

 

Honda SOHC High Performance Cam Shafts
 
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 with-out the headaches that monster cams can produce with out  background and experience behind you.
For Advice Please Call (715) 356-7346

 

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 F2 (75-76); 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.



KHD CX-1     $239.95

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 K (69-78) SOHC 8V

 

INTAKE

EXHAUST

VALVE LASH (INCH):

.004"

.005"

VALVE LIFT (INCH):

0.345

0.345

DURATION @ .0.050":

229

229

LOBE CENTER:

99.5

99.5

 

INTAKE OPENS     15     BEFORE TDC

EXHAUST OPENS     34     BEFORE BDC

INTAKE CLOSES     34     AFTER BDC

EXHAUST CLOSES     15     AFTER TDC

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


CX-1     $239.95

 

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 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.


CX-2     $239.95

 

 

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.


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.


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.


CX-5     $227.00

 

 

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.

CX-7     $239.95  
Cycle X Race Team Approved

 

 

 

 

 

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.

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.

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.

CX-11     $299.00

 

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.



CX-HELLCAT     $299.00
Cycle X Race Team Approved

 

 

 

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)

Very limited stock available! One set left!

 

 

 

 



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

 

 

 

 

Cam Chain Tensioner Parts

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


 

 

Cycle X Racing Cam Chain Tensioner
 

Cycle X #1 Full Support Racing Cam Chain Tensioner

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.
 

ENV-006A  $139.00
On Exchange Basis Only

Call to order

 

 

 

Full Support Option #2

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.
 

ENV-006B  $79.00

Call for availability
 

 

Honda CB750 Full Support / Slipper Cam Chain Combo

Same as the above two options, but in a combo at discounted price.

ENV-006C     $189.00

Call for availability

 

 

 

 

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

ENV-107     Original price $59.00

SALE PRICE     $49.99

 

 

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     $39.95

OEM Adjustable Camshaft Sprocket Combo

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

 

CS-017B     $49.95

 

 

 

 


 

Remanufactured (Slotted) Camshaft Sprockets

For the budget minded.
Slotted OEM camshaft sprockets.

While supplies last.

 

CS-017C     $29.95

 

 


 

 

 

 

 

Cycle X Cam Tower Stabilizers!

Why do people install these cam tower stabilizers? (generally welded)

Well many years ago, high performance Honda people were experiencing broken cam chains. The use of huge cams, OEM chains and 200-plus pounds of spring pressure might have had something to do with it.

Many old-timers thought the broken cam chains were a result of the inner cam shaft journals being .006 smaller than the outer cam shaft journals, resulting in camshaft flex.

Secondly, they thought the cam towers were unstable because they were only relying on the 6mm bolts to hold them down.

Anyway, to modify Honda cb750 valve covers usually consists of drilling the valve cover in the proper location, machining the alloy inserts, jigging and welding the inserts in place. Once the valve cover cooled down, the inserts were drilled and final tapped.

The above mentioned process seemed fine to us, except for the amount of
extreme heat during welding and not to mention the machine time involved.

So here's what we came up with.

Our Cycle X modification consists of jigging, drilling, tapping the valve cover and installing our inserts. This cost effective, super strong cure for expensive procedures (without the
extreme heat and machining) is available, NOW

If you still doubt us, here's what one of our customers had to say about our modification:

"Once again you guys are right on the money. Welding on aluminum is not only tricky to do right but actually makes the structure weaker. As a retired tool designer in the aircraft industry we use a LOT of aluminum weldments in tooling for weight as well as common expansion factors since the majority of structure we are holding, positioning, etc. are aluminum. Your fix for this old problem is right on the money, and the price isn't bad either." - Leonard Ledoux

He continues:

"You guys are spot on, putting all that heat into the aluminum casting just turns it into butter. I will grant that 42 years ago it was probably a good idea, but we know so much more today about welding aluminum that it really does relegate the welding approach to the dustbin of tried and failed efforts. Even a machined from billet valve cover would suffer if welded up in the manner usually presented. Your approach is far superior."

Includes:  Modified valve cover. (8) 6mm allen bolts, washers and nuts.

Cycle X Race Team Approved

ENV-CTS    $139.95 (with exchange)

Call to order
 

ENV-CTS1    $169.95 (without exchange)

Call for availability

 

 

 
 

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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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Cycle X Global Headquarters

6246 US Hwy 51 South

Hazelhurst, WI 54531

Phone: 715-356-7346

Email: cyclex@cyclexchange.net (primary) or hotrodcyclex@gmail.com (for sending attachments)

 

 

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