Honda cb750 Gaskets

Oil Tight Top Ends By CycleX.

The problem:
Honda has tried a few things to remedy oil seepage or leakage with modifications like the lower right photo.
After market people have designed new head gaskets in many variations and heavy duty studs were later introduced in another attempt to help with this problem.

Observations:
From the head gasket upwards we have counted 16 areas that could be prone to leakage ..... 4 more areas if the base gasket, head gasket, base "o" rings and valve cover is included.

The cure:
#1
We have eliminated 12 of the 16 areas prone to leakage with
high quality products and machine work.
#2
The feed "O" rings have been re-sized with Viton material and the return "tall O-rings" have been re-sized better materials.
#3
The top of the cylinder head and cam towers have been re-machined in many locations to channel the oil to the cam chain tunnel.
This procedure eliminates 6 of the 8 tall drain "O" rings.
#4
New head gaskets and valve cover gaskets have been produced for the CycleX cure.
#5
Billet pucks (under the cam towers) have been machined with Viton "O" rings and will be available separately or in a "kit form"
#6
Several parts options will be offered along with machine work pricing for your consideration.

Machine work pricing:

Machine work:
Machine the cylinder head and cam towers to re-direct oil return path.
Tap and plug 6 of the 8 original oil return drain holes.
$175.00

Surface head or cylinder.
$30.00 each or $50.00 for both.
Generally required when using MLS head gaskets.

Note:
Disassembly of the head is required when oil drain modifications are done.
(8) 12mm long heli coils are recommended for strength in the cam tower area.
(6) 12mm heli coils are also recommended on the top of the cylinder.
$8.00 ea.

Parts:

OPTION #1

Billet pucks with Viton "O" rings for under the cam towers.
Designed and machined with the proper "O" ring compression.
These pucks replace the rubber versions which seem to be one of the bigger problems with seepage.

$82.00 Set of 6 # NL-100

OPTION # 2

(6) Billet pucks with Viton "O" rings.
(2) Viton oil feed "O" rings with proper sizing.
(2) "Tall" drain rubbers with proper sizing (new material)
Head gasket for all years, bore sizes. MLS also available by request.
(14) ARP 6mm bolts for head to cylinder and cam tower to head. (world class quality)
(4) Nuts and ARP washers.
4 oz. can of Gasgacinch Gasket Sealer included ( not shown in picture )

$229.00 # NL-200
Add $19.00 for MLS head gaskets.
Call or email to order with head gasket size

OPTION # 3
The Ultimate Kit.

(6) Billet pucks with Viton "O" rings.
(2) Viton oil feed "O" rings with proper sizing.
(2) "Tall" drain rubbers with proper sizing (new material)
Head gasket for all years, bore sizes. MLS also available by request.
(14) ARP 6mm bolts for head to cylinder and cam tower to head. (world class quality)
(4) Nuts and ARP washers.
CycleX Kibblewhite heavy-duty studs.
CycleX Kibblewhite matching heavy-duty nuts.
Valve cover gasket. (best gasket ever made)
4 oz. can of Gasgacinch Gasket Sealer included ( not shown in picture )

$426.00 # NL-300
Add $19.00 for MLS head gaskets.
Call or email to order with head gasket size

Not so techy tech tips .... coming soon.
Some assembly procedures.

Gasket Identification Early vs. Late:

EARLY LATE # 3 LATE

Read before purchasing our MLS gaskets or any gasket set.

When purchasing Honda CB750 head gaskets, a couple of questions should be to be asked. Early or late? Big drain holes or small?

The above left photo shows an early Honda CB750 cylinder and the arrows show the drain holes from the top end. We call them small for obvious reasons.

The above right photo shows a later Honda CB750 and the arrows show the drain holes from the top end. We are calling them large for obvious reasons. The later cylinder and head gaskets have larger holes because Honda installed 8 dowel pins and 8 tall "O" rings to try to correct head gasket weepage issues.

When using MLS gaskets, our testing showed the 8 dowels and 8 tall "O" rings are not needed because the MLS gaskets work so well. On the other hand, many people were telling us "Well, if Honda did it, it must be right". So, we offer the later head gaskets so people can sleep better at night.

Note: When installing big bore sleeves, early cylinders are always used because the larger sleeves leave little to no room for the 8 tall "O" rings.
With that said, you will not see a "big hole" later model MLS head gasket in 890cc and above cylinders.

#3 late photo
Potential Head gasket oil leaks continued:
Always check your dowel pin protrusion. We have measured many head gasket thicknesses when taking motors apart and noticed the average thickness is about .040 after running.
New head gaskets average between .052 to .048 thick and compress to approx .040 ... depending on the gasket.
We have noticed some of those drain hole dowel pins in photo #3 protrude upwards of .040.
So,
If the dowel pin protrudes .040 and the gasket is .040 thick ...... the dowel pin should be trimmed or ground approx. .010 or so shorter just to be sure.

GASGACINCH SEALER

Top-quality gasket sealer and belt dressing.

It's a good size for light usage and do-it-yourself automotive enthusiasts.

Available in 4-ounce cans. $ 15.95

Honda CB750 Super Gasket Set (Race Proven)
"New Version"
Now featuring an oil pump stopper spring, pressure relief spring, oil stopper rubber and oil filter "O" rings. (At no additional cost!)

Cycle X super gasket sets are a premium quality cure for age old problems concerning chrome covers, untrue surfaces, re-torquing
and the need to run to the hardware store for miscellaneous "O" rings.
Cycle X was the first to put effort, expense and test these modern gaskets on Honda cb750s.

Head Gaskets: MLS head gaskets have been around for years. They feature great rebound and are layered steel with a Viton coating.
Base Gaskets: Steel with Viton coating.
Side Cover Gaskets: Alloy with Foamet coating is the same combination used to stop old Harleys from leaking.
Oil seals and every "O" ring in the motor that most kits do not include.

Super Gasket Set Includes:

MLS head gasket available in most bore sizes
(no re-torquing needed)

Base gasket available in .010 and .014 thickness

Valve cover gasket. (no leak alloy foamet coated)

Dyno cover gasket (alloy foamet)

Trans cover gasket (alloy foamet)

Clutch cover gasket (alloy foamet)

Sump cover gasket (alloy foamet)

Cam chain gasket (alloy foamet)

Oil pump gasket (alloy foamet)

(4) Cylinder liner "O" rings

(8) Valve inspection "O" rings

(4) Oil feed "O" rings (inner intake cylinder studs)

(4) Cam tower "O" rings (under the cam towers)

(2) Oil line "O" rings (oil lines bolt to the motor)

(3) Oil pump "O" rings (oil pump bolts to the case)

(1) Case "O" ring (between case halves in the front)

(4) exhaust gaskets

(6) nickel plugs (under the cam tower)

(8) valve seals

(3) galley plug "O" rings (oil pressure gauge and galley plugs under the motor)

Oil seal set (69-76 with 77-78 counter-shaft seal optional)

Points, starter and breather cover gaskets

Cycle X super gasket kits are race proven and are the best money can buy.

ENG-001 $218.95 Cycle X Race Team Approved

KIT FOR EARLY HEAD GASKET

KIT FOR LATE HEAD GASKET

Super Gasket Top End Kit

Same super quality as the Super Gasket Set, but Top End ONLY!

Super Gasket Top End Kit Includes:
MLS Head Gasket (specify bore size)
No-Leak Valve Cover Gasket
Steel Viton Coated Base Gasket
Breather Cover Gasket
(4) Exhaust Gaskets
(6) Cam Tower Nickels
(8) Valve Guide Seals
(4) Cylinder Stud Oil Feed O-Rings
(4) Cam Tower O-Rings
ENG-001A $128.95 Cycle X Race Team Approved

KIT FOR EARLY HEAD GASKET

KIT FOR LATE HEAD GASKET

Honda CB750 Super Side Cover Kit

This Super side cover kit is for you folks that have chromed, polished or powder coated your engine side covers and do not need a complete gasket kit.
On the other hand, you want the best gaskets money can buy.
These gaskets are alloy with a AFM coating applied. No sealer or shifting the gaskets to get them in place, they fit perfect.

Kit includes:
Dyno gasket
Trans gasket
Clutch gasket
Valve cover gasket
Sump gasket
Oil seals for the above mentioned covers

Retail cost would be over $110.00

ENG-001B $89.00 Cycle X Race Team Approved

Honda 77-78 CB750 Oil Seal

1977-78 Honda use this bigger seal around the counter shaft.
You will need this seal if you have a 77-78.

OL-006 $13.99 (Each)

Cycle X High Performance Individual Gaskets

Cycle X Race Team Approved
Cycle X high performance "no leak" and MLS gaskets were financed, tested and designed for people who want the best money can buy.
Alloy gaskets with foamet coating (no sealer needed).
Gaskets for 69-78' SOHC CB750

What is MLS?
MLS stands for Multi-Layer Steel. MLS head gaskets are comprised of three layers of stainless steel.
The outer layers are an embossed viton coated stainless steel providing a superior seal with excellent rebound characteristics and are corrosive resistant.
MLS head gaskets reduce bore distortion and withstand extreme cylinder pressures.

No Leak Oil Pump Gasket

ENG-002 $9.95

No Leak Cam Chain Tensioner Gasket

ENG-003 $7.95

No Leak Transmission Gasket

ENG-004 $19.95

No Leak Dyno Gasket

ENG-005 $16.95

No Leak Sump Gasket

ENG-006 $19.95

No Leak Clutch Gasket

ENG-007 $19.95

No Leak Valve Cover Gasket

ENG-008 $24.95

No Leak Viton Base Gasket

ENG-009 $59.95

NO LEAK MLS HEAD GASKETS
See I.D. Info At The Top Of This Page

MLS Late Model (Large Holes)

These later model head gaskets have the bigger holes for the (8) dowel and tall rubber "o" rings for oil drainage from the top end.

ENG-010LATE $69.95

MLS Early Model ( Small Holes)

These MLS (multi-layered steel) head gaskets for Honda CB750 SOHC models were tested, raced and Cycle X initiated the cost of tooling expenses by placing massive orders. These head gaskets, combined with heavy duty studs and nuts, are the solution for weeping head gaskets.

ENG-010 $69.95

Cometic Base Gasket

Great quality at a great price.

ENG-011 $19.00

Starter Cover Combo Gaskets

We have combined the starter cover and breather cover gaskets.

ENG-012 $8.50

Cam Tower Rubber Nickels

ENG-013 $10.00

Valve Inspection Cap O-Rings

ENG-014 $8.50

Cylinder Base O-Ring
Combo Kit

We have combined the cylinder sleeve "O" rings and oil drain rubbers for you.

ENG-015 $8.50
OUT OF STOCK

Dyno Cover Gasket

ENG-016 $8.50
OUT OF STOCK

Transmission Gasket

ENG-017 $8.50

Or, get 4 for $12.00! ($3 each)

Sump Gasket

ENG-018 $8.50

Valve Cover Gasket

ENG-019 $8.50

Clutch Cover Gasket

ENG-020 $8.50

Head Gasket

ENG-021 $8.50

Cometic Copper Gaskets, Limited Quantities

These Cometic copper base and head gaskets were purchased in a race shop buyout.
SUPER SALE $ 39.00 each

Anyway, here's what we have available:

HEAD GASKET EARLY 65MM / .043" $ 39.00	OUT OF STOCK
BASE GASKET .005 $ 39.00
BASE GASKET .010 $ 39.00

Honda CB750 Motor Builder Kit

This kit is used everyday in the shop.

Includes:

✓ Starter cover gasket
✓ Breather cover gasket
✓ Honda CB750 oil seal kit
✓ 11 small side cover dowels
    (Honda part # 94301-08140)
✓ 2 case dowels
    (Honda part # 94301-10160)
✓ 3 oil pump dowels
    (Honda part # 15155-300-000)
✓ 4 cylinder to head, case to cylinder dowels
    (Honda part # 94301-12180)
✓ 8 red viton Kibblewhite valve stem seals
✓ Spark advancer shaft viton o-ring
✓ Neutral switch viton o-ring
✓ Crankcase half viton o-ring
✓ 6 oil line & oil pump viton o-rings
✓ Countershaft bearing holder viton o-ring
✓ 2 clutch adjusting screw viton o-rings
✓ 5 top/bottom cylinder & dyno plug viton o-rings
✓ 3 large crankshaft plug viton o-rings
✓ 8 tapped cover viton o-rings
✓ 4 cylinder sleeve viton o-rings
✓ 4 camshaft tower viton o-rings
✓ Upper case from plug viton o-ring

ENG-027 $109.00

Dowel Pin Kit for Motor Rebuilds

When rebuilding portions of your Honda CB750 dowel pins are generally rusted, stuck and deformed after 4 plus decades.
Here are dowel pin kits that we use on all motor rebuilds.

Small side cover dowels: Qty 11 (Honda part # 94301-08140)

Case dowels: Qty 2 (Honda part # 94301-10160)

Oil pump dowels: Qty 3 (Honda part # 15155-300-000)

Cylinder to head, case to cylinder dowels: Qty 4 (Honda part # 94301-12180)

Note: The front case dowel #15326-300-00 is no longer available. Not a big deal because they are never stuck in the cases and are always in good condition.
The 8 dowels #12116-300-000 are late model drain hole dowels between the cylinder and head and are not included because they are never bad and many people do not use them.

ENG-026 $35.95 (All 20)

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

High Temperature Viton Valve
Guide Seals

These seals were made for us and feature extreme temperature viton materials.
We bought these seals by the thousands so they are a little cheaper.

Note: These are not the blue seals found on eBay, these are exclusively ours.

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