The Highest Level. 77-78 F2-F3  5mm valve system.

We are proud to reintroduce the 77-78 Honda cb750 Super sport 5mm valve kit.
This kit is used by the top engine builders world wide.
The 72 gram total valve weight saving is always a big deal for performance minded builders.
Don't forget our titanium valve adjuster nuts for more weight savings.
 # HR-001        $ 949.00 ( Limited Supply)


RC Engineering Head / 5mm Kit:
Cylinder head modifications:
This RC cylinder head has been fully ported with combustion chamber blending.
We corrected a few things and added 34mm intakes. The seat area was opened up to 86% of the valve size for a proven performance upgrade.
The combustion chamber has been opened to 62mm which would be perfect for you AHRMA folks.
Surfaced to minus .019
Heli-coiled cam tower area with longer coils for strength.
Valve guides have been installed, reamed and a muti-angled valve job was performed.
We have this head nearly completed .... Until a camshaft is selected. At that time valve to valve clearances and spring pressures will need to be checked and set. 

Race proven Kibblewhite 5mm valve kit:
These kits have been used in the TQ sprint car world for decades and proven to be reliable. The TQ cars have been known to exceed 12 thousand rpm consistently.
With these lightweight valves ... Spring pressures can be set lower to gain power and make life easer on valve trane components.
Add lightweight Titanium adjustor nuts and lighten rocker arms for the full benefits of this kit.
$ 1975.00



1124cc Stroker kit (complete)
This 1124cc kit is not some worn-out abused engine parts.
69mm freshly refurbished, stroked, micro polished, and balanced to perfection to under a half a gram crankshaft.
New forged Alcoa 72mm pistons, Total seal rings with  a advertized compression ratio of 12.5 to 1.
The cylinder has been freshly re-sleeved, milled .030, bored and honed to perfection.

Refurbished Falicon "knife edge" connecting rods with ARP 625 plus 21 bolts
$ 3100.00


31mm Keihin CR Carbs ... AHRMA
Working CR 31mm carbs with extra jets and such.
You need these.

$ 849.00


TURBO Pistons And Cylinder Combo.
MTC (alcoa) 65mm 836cc pistons. (pre-owned but nearly new)
These pistons are flat tops for turbo and other applications with deep valve pockets for larger camshafts.
New rings.
Early cylinder ..... Bored, honed and surfaced.
Blasted with medium media for good paint adhesion.
Nice fins






Honda CB750 American Turbo Pack Turbo

Complete kit with Cerakoted head pipes.






"Big Air" Honda high-performance cylinder heads. 
These "Big Air" heads are some of the most powerful Honda heads ever built.
This highly modified cylinder head started life as a 77-78 F super sport head with special built 5mm valves, bee-hive springs and hundreds of hours in porting and combustion chamber work.
Now for the fun part ...... These heads produced over 124HP on a TQ midget chassis dyno with only a 67mm (900cc) bore.




Big Air-Head Kit # 2


66MM 860cc Big Bore Kit Combo ( K and F models)

This might be the perfect big-bore kit for Honda cb750s. Combined with port work and CX-11 camshaft this kit produced over 120HP in a TQ mini sprint car on a chassis dyno ..... Not an engine dyno.

Kit includes:
CycleX stepped sleeves for no upper case boring in most cases. (great sleeves)
JE pistons with armor glide coatings.
66mm bore (2.5986)
Comp height .940  (Basically 12.5 to 1 with a K model head)
XA6600 ring set.
Generous valve pockets for oversize valves.

We use these 860cc in many 77-78 Honda cb Super sport models. This kit will help with the larger combustion chambers for sensible compression ratios for hot-street life.  
$ 928.00




Carillo Rods
Honda cb750 69-78
Refurbished and ready to go.
Standard length.
 316 grams.
$ 799.00




JMR Honda cb750 big-block (New)
Call for details

# HR-100





JMR Honda cb750 big-block with MTC pistons
# HR-101





RC Engineering Big-Block Cylinder
# HR-103






RC Engineering Big-block Cylinder
 # HR-104



RC Engineering Big-Block With Coated 73mm Pistons





CycleX #6 "Big-Port Head"  F-2 F-3 #410 Head



Falicon Knife Edge Connecting Rods
Refurbished and ready to go.
Indestructible "Knife edge" rods proven to be strong and reliable at a great price.







fARD Parts





A 3.99% customer service charge is applied to all phone orders.

If ordering via phone, please also provide the part # of any products you are interested in for faster and more accurate service.

If you encounter a (rare) broken button as you're trying to add parts to your cart (going to PayPal summary instead of your cart or not opening PayPal at all) or anything else of concern, please call us to report it. We'll try to have it fixed for your convenience within the next 5-10 minutes. Afterwards, refresh the page and try again.

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 our home page

Cycle X Global Headquarters

6246 US Hwy 51 South

Hazelhurst, WI 54531

Phone: 715-356-7346

Email: hotrodcyclex@gmail.com