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.
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...
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We will be
referring to this measurement when preparing a cylinder head
for sunken valves. |
This measurement
is mainly referring to spring pressures. |
This photo
simply shows valve to valve measuring location when big
camshafts, oversize valves or both are being considered. |
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.
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High Performance
Valve Springs
Stock valve spring installed height (1.455ish) spring pressures
with these Kibblewhite ENV-008 springs are:
Kit includes: |
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Precision Valve
Train Springs, Titanium Retainers and Matching Keepers. These kits are the ultimate in precision and weight reduction.
Race proven and a must for higher RPM situations.
Kit includes: |
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Precision Valve
Train Springs, Titanium Retainers and Matching Keepers.
Same as above at a reduced price.
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Precision Valve
Train Springs, Titanium Retainers, Titanium Adjuster Jam Nuts and
Matching Keepers. This kit is upgraded with hard welded rocker arms. Race proven by people who actually race!
Kit includes:
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Precision Valve
Train Springs, Titanium Retainers, Titanium Adjuster Jam Nuts and
Matching Keepers. This kit is upgraded with hard welded rocker arms. Same as above at a reduced price.
Kit includes:
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High Performance
Valve Springs for Large Camshafts (K & F models)
Kit
includes: ENV-009 $109.00 |
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The Highest
Level Bee-Hive Valve Springs
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(77-78)
Honda CB750 F2, F3 Valve Spring and Retainer
Combo
Caution: 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 |
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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: ENV-013 $178.00
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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.
Drop-in Camshaft No
valve to valve or valve to piston checking needed. INSTALLATION INFORMATION ENGINE: Honda CB750 F2 (77-78); CB750 K (69-78) SOHC 8V
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.
CX1-R-975 $265.00 ![]() |
![]() Drop-in Camshaft
No valve to valve or valve
to piston checking needed.
These 975, 990 and 1000
camshafts are all drop-in camshafts with ever-so-slight differences in
characteristics that many people never notice. Check out the
specifications or call for further advice. INSTALLATION INFORMATION ENGINE: Honda
CB750 F2 (77-78); CB750 K (69-78) SOHC 8V
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.
CX1-R-990 $265.00 ![]() |
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. INSTALLATION INFORMATION ENGINE: Honda CB750 F (75-76); CB750 F (77-78) CB750 K (69-78) SOHC 8V
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.
KHD CX-1 $299.00
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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
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.
CX-1 $299.00 ![]() |
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.
CX-2 $299.00 Call for availability. ![]() |
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
* = 98.5° overall
VALVE TIMING IS CHECKED WITH ZERO
VALVE LASH @ 0.050 INCHES OF VALVE LIFT.
Additional tech info coming soon. CX-3 $299.00
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Strong mid and top end power for
street-strip. Use with big bore, headers, and valve springs. Made for Cycle X
by Web Cam.
INSTALLATION INFORMATION ENGINE: Honda
CB750 F (75-76); CB750 K (69-78) SOHC 8V
VALVE TIMING IS CHECKED WITH ZERO
VALVE LASH @ 0.050 INCHES OF VALVE LIFT.
Additional tech info coming soon. CX-4 $299.00 Call for availability. |
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
VALVE TIMING IS CHECKED WITH ZERO VALVE LASH @ 0.050 INCHES OF VALVE LIFT.
Additional tech info coming soon. CX-5 $299.00
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This camshaft is for
drag race applications. 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.
Additional tech info coming soon.
VERY LIMITED STOCK. One left available!
XXX-4
$299.00
Call for availability.
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This camshaft is one
of our favorites for 890cc and bigger Honda CB750 race bikes.
(12+ comp ratio or more) INSTALLATION INFORMATION ENGINE: Honda
CB750F2 (75-78); CB750K (69-78) SOHC 8v
VALVE TIMING IS CHECKED WITH ZERO VALVE LASH @ 0.050 INCHES OF VALVE LIFT.
Additional tech info coming soon. VERY LIMITED STOCK. One left available! CX-10 $399.00Call for availability.
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This camshaft
profile is one of the hardest hitting mid-range and excellent
top-end camshafts designed for Honda CB750's. 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.
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.
INSTALLATION INFORMATION ENGINE: Honda
CB750 F2 (75-78); Honda CB750K (69-78) SOHC 8V
VALVE TIMING IS CHECKED WITH ZERO VALVE LASH @ 0.050 INCHES OF VALVE LIFT.
Additional tech info coming soon.
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This "Hellcat" camshaft is
the latest addition to our specialty performance camshaft options. ENGINE: Honda
CB750 F2 (75-78) SOHC 8V; Honda CB750K (69-78) SOHC 8V
VALVE TIMING IS CHECKED WITH ZERO VALVE LASH @ 0.050 INCHES OF VALVE LIFT.
Additional tech info coming soon.
CX-HELLCAT $299.00
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This "Hellcat 2" camshaft is
the latest addition to our specialty performance camshaft options. ENGINE: Honda
CB750 F2 (75-78) SOHC 8V; Honda CB750K (69-78) SOHC 8V
VALVE TIMING IS CHECKED WITH ZERO VALVE LASH @ 0.050 INCHES OF VALVE LIFT.
Additional tech info coming soon.
CX-HELLCAT2 $299.00 Call for availability.
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CLICK HERE: FOR INFO ON DEGREEING AND CAM INSTALLATION
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
Production delayed. Stay tuned for future details.
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Photo is for reference only...not actual parts!
Full Floating, Self Compensating Cam Chain Tensioner
These cam chain
tensioners are designed to float and compensate for milled heads,
thinner gaskets, worn/stretched cam chains and hard deceleration
which destroys OEM tensioners.
The arrows show
how the sliders can move a few degrees to compensate for the above
mentioned problems.
Features:
✓
Proven XPA 46 slider material. ✓ Floating/compensating design. ✓ No more than four chain links unsupported. ✓ Front slider is longer with a gentle curve. ✓ Oil drippers on both rear sliders. ✓ Guaranteed for life! ✓ Stock length cam chains, peanut or straight side plates are fine. |
Note: Fixed slider designs shift the pressure points upward and only make contact at the very top when thinner gaskets, milling and stretched chains.
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Cam Chain Tensioners...Here is the Problem!
The above photos show an OEM Honda tensioner and an unidentified aftermarket tensioner. These photos were from an AHRMA vintage roadracer's bike (thanks Matt Esterline #237) and clearly show the problem. The OEM tensioner lasted approx. 3 weekend races and the aftermarket tensioner approx. 10 weekend races. These types of product malfunctions are exaggerated when racing is involved, but racing makes for a good test because these results happen in street bikes as well.
Note: Matt's bike is using an OEM stock cam chain tensioner rather than a manual tensioner that has been overadjusted.
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Final Fitment, Checking, and Testing
This project presented several obstacles that needed the expertise of a world class machine shop in the great state of Texas. With a combination of 3D imaging, motor cut-a-ways and proven XPA-46 materials, no expense was spared. This floating/self compensating design and highly accurate machining processes surely makes this a candidate for product of the decade (we like saying that).
ENG-108
Production delayed. Stay tuned for future details.
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
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Cycle X Manual Cam Chain
Tensioner
Fine Thread Manual Tensioners and Gasket Combo
ENV-107 Original price $59.00
Close out price: $25.00
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 $39.95
Call for availability.
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 $49.95
Call for
availability.
Remanufactured (Slotted) Camshaft Sprockets
For the budget minded.
Slotted OEM camshaft sprockets.
While supplies last.
CS-017C $29.95
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NOTE: As of July 1st, 2018, an extended goods and services tax (GST) has been applied to all Australian consumers buying overseas, charging an extra 10% in taxes to us with each purchase. To ensure that you can continue to purchase from us in Australia and we can provide our parts at our usual lower cost, please contact us at the email below if interested in any particular parts so that we can make a special shipping arrangement for you.
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.
Click to go back to Engine Parts page
Cycle X Global Headquarters
6246 US Hwy 51 South
Hazelhurst, WI 54531
Phone: 715-356-7346
Email: hotrodcyclex@gmail.com