HONDA CB750 VALVE TRAIN

 

 

 

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.
 

 

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            $79.00


 

Honda CB750 Valve Adjusters (New!)

Valve adjusters have a tough life and are usually pretty beat up. Not exactly breaking news, but the adjusters are in stock. $59.00 for a set of eight as shown.

ENV-060     $59.00, set of 8
 

 

 

 

 

Valve Adjuster and Titanium Jam Nut Kit

Many people spend a lot of time and money to achieve light weight valve trains. These jam nuts are super light and priced to not hurt the wallet.

ENV-061     $138 .00, set of 8 each
 

Titanium Jam Nuts Only Set Of 8
 $ 79.00
 

 

 

 

 


 

High Performance Precision 69-76'
Valve Keepers

As you may or may not early style valve keepers are unavailable through Honda anymore which creates a problem if you ever lose one of these tiny things. Cycle X teamed up with Kibblewhite to reproduce these early keepers with more precision.

ENV-VK1     $79.00

 

 

 

Red Viton Kibblewhite Valve
Stem Seals, 69-77

KPMI® Red 100% Viton valve stem seals are designed to have optimum fitment, allow , maximum lift, and to give maximum life. KPMI® Red valve stem seals are resistant to high temperatures, petroleum products and the corrosive gasses that are the by-products of combustion. These seals retain their ability to seal in situations where other materials could harden and allow oil to enter the combustion chamber causing detonation, carbon build up and a loss of power. The Red Ones are truly the racers choice.

ENV-VSS     $19.99
 

 


 

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.
(Normally Retails At  - $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.
(Normally Retails At  - $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.
 

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


 


 Retainer Set Only
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-F2R    $ 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


 

Honda CB750 "Bee Hive" 5mm
Conversion Kit

This is the same 5mm conversion kit that has been used by top race teams but has been upgraded with "bee hive" valve springs for even more valve train weight reduction.

Kit includes:
 Lightweight intake valves (34mm oversize)
Lightweight exhaust valves (STD size)
Intake guides and seals
Exhaust guides and seals
Keepers and lash caps
Bee hive retainers
Bee hive silicon springs
H.T. steel base washers and extra shims
Instructions

$949.95     ENV-BEEHIVE

Call Or Email for ordering/availability.


 

Honda CB750 5mm Conversion Kit

This complete 5mm racing conversion kit has been used by many of the top race teams for years.

Kit includes:
 Lightweight intake valves
Lightweight exhaust valves
Intake guides and seals
Exhaust guides and seals
Keepers and lash caps
Titanium retainers
Chrome silicon springs
H.T. steel base washers and extra shims
Instructions
  This kit normally retails for $1,199.95

ENV-018     Your Cycle X Price: $949.95      Cycle X Race Team Approved

Call or E-mail for ordering/availability.

 

 

 

 

High Lift Valve Guides

These valve guides are .100 shorter (top side) to accommodate big boy camshafts.
By the way: Our cast iron valve guides are the best for stock or racing applications. (Bronze wears rapidly on Honda CB750's)

ENV-OHL     $129.00 Per Set
 

 


 New High Lift, High Flow Valve Guides.
 The best ... just became better.

The Cycle X / Kibblewhite cast iron valve guides are race proven and made from the best materials known to man.
These valve guides are able to be installed with highest lift camshafts available.
These guides are also designed so the valve seal will not drop into the keeper groove at full lift causing excessive oil to enter the intake ports.
Our new valve guides are tapered on the lower portion (port side) to noticeably increase flow numbers. Great stuff. Also available in "Cryo" treated.

ENV-033   $ 149.00

Cryo Treated High Lift Cast Iron Valve Guides

The testing is done and our test bike showed zero wear in 37,000 miles. We don't have time to see how long these cryo valve guides could actually last. Maybe forever!

ENV-034     $168.00
 

 

 

Question:
Are valve guides pre-honed?

Reply:
If someone's advertisement is suggesting that you install their guides and no reaming or honing is needed ..... They are wrong and have misleading adds.

First:
Not all valves have the same valve stem diameter
Second:
All guides collapse a bit in the middle of the bore when installed.

Here is what we do:
We blast the carbon off so when we remove the guides the carbon doesn't damage or tear aluminum on the way out.
Then we measure the inside of the valve guide hole to determine the proper OD of the guide being used.
The cylinder head is heated and the valve guides are pulled in place with a special tool instead of drifting in place.


Speaking of drifting,
Drifting the guide will "mushroom" the top side of the guide and in a worst case scenario ..... The valve guide can develop an "S" shape on the inside bore. These mushroom and "S" shapes are common with mainly Bronze guides.
We then ream the guide to get it somewhat straight and follow-up with a Diamond hone to the exact dimensions.

Also,
The diamond hone will leave a nice pattern to retain a small amount of oil.
A muti-angle valve job is then done because the new valve guide will never follow the exact path of the old guide.

So,
What does Pre-honed actually mean?


 

 

Solid One Piece Stainless Steel Hard Chrome Stem Valves

Check out the high performance solid, one piece, stainless steel hard chrome valves. Stellite tipped and added machine swirl.
These valves are world class quality and comes at a sale price that cannot be beat.
34mm intake.
33.5mm intake.
32mm intake. (stock "K" model size)
28mm exhaust.
Sold as a set or individually.

32mm STD Size Stainless Steel
Hard Chrome Intake Valves

This selection of "hard chrome" valves are endorsed and used by top engine builders for decades.

One (1) valve per quantity.

These valves are designed and manufactured with the "preferred" 69-76 valve keeper groove. These valves will work in 77-78 K model heads by changing the keepers and top spring retainers from earlier 69-76 models.

 

ENV-32MM

$24.99 per valve

Quantity

 

 

33.5mm 1.5 Oversize Stainless Steel Hard Chrome Intake Valves

Check out the quantity discounts for sets of 8 valves.

One (1) valve per quantity.

These valves are designed and manufactured with the "preferred" 69-76 valve keeper groove. These valves will work in 77-78 K model heads by changing the keepers and top spring retainers from earlier 69-76 models.

 

ENV-335MM

$24.99 per valve

Quantity


 

 

34mm 2mm Oversize Stainless Steel Hard Chrome Intake Valves

One (1) valve per quantity.

These valves are designed and manufactured with the "preferred" 69-76 valve keeper groove. These valves will work in 77-78 K model heads by changing the keepers and top spring retainers from earlier 69-76 models.

 

ENV-34MM

$24.99 per valve

Quantity

 

SUPER SALE!
SET OF 4 FOR $ 48.00

28mm Stainless Steel
Hard Chrome Exhaust Valves

One (1) valve per quantity.

These valves are designed and manufactured with the "preferred" 69-76 valve keeper groove. These valves will work in 77-78 K model heads by changing the keepers and top spring retainers from earlier 69-76 models.

 

OUT OF STOCK

 

 


 

 

 

 

 

 


 



 

Cycle X Super Flow Valves

Cycle X super flow valves outperform any valve on the market today. The Nitrite coating is perfect for high temperature, high RPM and run cooler.
Designed for the preferred 69-76 spring retainers and keepers.
ENV-015    $199.00 per set of 8 

 

 

 

KIBBLEWHITE VALVE TRAIN COMPONENTS

Black Diamond Intake Valve (STD.)

All KPMI® Black Diamond™ stainless steel valves are impregnated by a special German process to a depth of .002”, with a surface build up of .0002”. This “Black Diamond™” process improves wear properties, reduces friction, and provides resistance to corrosion and wear that is superior to chrome and nickel electrolysis plating. Each valve is designed using Finite Element Analysis software, and profiles are tested on our computerized flow bench. Black Diamond™ Valves are lightweight, strong, one piece forgings with profiles that provide excellent flow characteristics.

 

Valve, Black Diamond™ Stainless, Std. IN, Honda®, CB™ 750 SOHC (Excluding F2™), 1969-1977

1 valve per quantity.

30-4186     $34.95

Black Diamond Intake Valve (+1.5mm) Oversize

All KPMI® Black Diamond™ stainless steel valves are impregnated by a special German process to a depth of .002”, with a surface build up of .0002”. This “Black Diamond™” process improves wear properties, reduces friction, and provides resistance to corrosion and wear that is superior to chrome and nickel electrolysis plating. Each valve is designed using Finite Element Analysis software, and profiles are tested on our computerized flow bench. Black Diamond™ Valves are lightweight, strong, one piece forgings with profiles that provide excellent flow characteristics.

 

Valve, Black Diamond™ Stainless, +1.5mm O/S IN, Honda®, CB™ 750 SOHC (Excluding F2™), 1969-1977

1 valve per quantity.

30-4187     $49.95


 

Black Diamond Exhaust Valve (STD.)

All KPMI® Black Diamond™ stainless steel valves are impregnated by a special German process to a depth of .002”, with a surface build up of .0002”. This “Black Diamond™” process improves wear properties, reduces friction, and provides resistance to corrosion and wear that is superior to chrome and nickel electrolysis plating. Each valve is designed using Finite Element Analysis software, and profiles are tested on our computerized flow bench. Black Diamond™ Valves are lightweight, strong, one piece forgings with profiles that provide excellent flow characteristics.

 

Valve, Black Diamond™ Stainless, Std. EX, Honda®, CB™ 750 SOHC (Excluding F2™), 1969-1977

1 valve per quantity.

30-4188     $34.95

OUT OF STOCK
 

Black Diamond Exhaust Valve (+0.5mm) Oversize

All KPMI® Black Diamond™ stainless steel valves are impregnated by a special German process to a depth of .002”, with a surface build up of .0002”. This “Black Diamond™” process improves wear properties, reduces friction, and provides resistance to corrosion and wear that is superior to chrome and nickel electrolysis plating. Each valve is designed using Finite Element Analysis software, and profiles are tested on our computerized flow bench. Black Diamond™ Valves are lightweight, strong, one piece forgings with profiles that provide excellent flow characteristics.

 

Valve, Black Diamond™ Stainless, +0.5mm O/S EX, Honda®, CB™ 750 SOHC (Excluding F2™), 1969-1977

1 valve per quantity.

30-4189     $49.95

OUT OF STOCK
 

 

 

 

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Cycle X Global Headquarters

6246 US Hwy 51 South

Hazelhurst, WI 54531

Phone: 715-356-7346

Email: hotrodcyclex@gmail.com