Refurbished Heads and Cylinders

Honda CB750 F-2, F-3 Refurbished High-Performance Head (In stock)

This is the same cylinder head is used on our F-2, F-3 git kit.
Fully ported to perfection with Superflow valves, high lift valve guides and bee-hive springs.
Also, this head has the drain hole modification performed (not shown in the photo)
The nice thing about this head is the mathematics are done to use big-boy camshafts (set up for CX-10 or smaller)
Ported, Serdi valve job with additional race tricks of the trade.

RF-27 $1,399.00

970cc Machined Cylinder and Coated Piston Kit (In stock)

This cylinder has been re-sleeved, surfaced, bored and honed for these Wiseco 70mm pistons. This early cylinder is the preferred year because they do not have the 8 oil drain holes.

Also, our cylinders are machined to accept "O" rings at the bottom of the sleeves. These piston kits were designed for a customer and we have 2 extra sets for sale.

Depending on your combustion chamber, this kit averages in the higher 10 to 1 ratios with "K" heads. This ratio would be perfect for larger camshafts that need higher compressions.

The pistons are made by Wiseco and have a bare weight of 165 grams.

They have an Armor-Glide coating on the skirts and a heat repellant coating which drastically reduces piston temperatures.

By the way, the kits are complete with wrist pins, circlips and rings. The kit also has the best cylinder sleeves in the industry.

RF-29 $975.00

Honda CB750 Refurbished Cylinder and Piston Kit (In stock)

This Honda CB750 SOHC Cylinder and Piston Kit has been machined and ready to bolt on. The cylinder has been glass beaded, surfaced, bored and honed to perfection.

The .050 over pistons are new and have a Armor glide skirt coating. The pistons also have a thermo barrier dome coating to repel excessive heat.

These are the same coatings used on all of our performance race bikes and motors. The rings have a chrome top ring for unleaded fuels and 3 piece oil rings.

This cylinder and piston kit is cleaned and ready to bolt-on.

RF-30 $449.00

This cylinder has been just completed with our 915 sleeves and pistons.
The re-sleeving procedure consists of removing the old sleeves, boring and honing the alloy block to size. Pressing in the new 915 sleeves and surfacing. Boring and honing the sleeves for piston fitment.
Note: Our sleeves allow the use of "O" rings at the bottom to prevent oil weepage.

The Cycle X designed Wiseco manufactured pistons are our favorite kit.

Note:
People talk about oil weeping upwards and and out the fin area when installing bigger sleeves. Well, we have seen many cylinders that have had this problem and after looking closer at the machine work We can see why. Most of these weeping cylinders have the alloy block bored (not honed afterwards) which leaves a boring bar machine finish allowing the oil to have a easer path upwards and eventually can loosen the interference fit.
Our cylinder alloy blocks are bored then honed to exact clearances with a fine finish before installing the sleeves.

Includes:
Reworked cylinder.
Coated 915 pistons. (Complete kit) rings wrist pins and such.

These 67.5 pistons are 155 grams per piston (4 grams lighter than a stock piston-bare piston weight). Sleeves are world class quality and designed to fit in the upper case without boring.
Generous valve relief for big cams and big valves.
10.25:1 compression ratio. Rings. Circlips. Wrist pins.
Note: Our sleeve design allows "O" rings to be used on the base side of the sleeves (like OEM) "O" are included in the kit.

This cylinder block has been machined and re-sleeved for the above mentioned kit.

Machining procedure:
Glass bead for inspection and appearances.
Remove old sleeves.
Skim cut the bottom side of then cylinder (generally about .003)
Bore and hone alloy block to accept the Cycle X sleeves. ( many shops simply bore the block and leave machine marks which can make the sleeves loosen at times)
The sleeves are installed and the top surface is milled.
The cylinder is bored and honed to final spec's.

This cylinder has been just completed with our 890cc (67mm) sleeves and armor-glide coated pistons.
The re-sleeving procedure consists of removing the old sleeves, boring and honing the alloy block to size. Pressing in the new 890 sleeves and surfacing. Boring and honing the sleeves for piston fitment.
Note: Our sleeves allow the use of "O" rings at the bottom to prevent oil weepage.

The Cycle X designed Wiseco manufactured pistons are our favorite kit.

Note:
People talk about oil weeping upwards and and out the fin area when installing bigger sleeves. Well, we have seen many cylinders that have had this problem and after looking closer at the machine work We can see why. Most of these weeping cylinders have the alloy block bored (not honed afterwards) which leaves a boring bar machine finish allowing the oil to have a easer path upwards and eventually can loosen the interference fit.
Our cylinder alloy blocks are bored then honed to exact clearances with a fine finish before installing the sleeves.

Includes:
Reworked cylinder.
Coated 890cc pistons. (Complete kit) rings wrist pins and such.

These 67mm piston sets are designed for Honda CB750 (69-78 SOHC) that are using big duration and lift camshafts.
Generally used when camshaft manufactures request 12.5 or higher compression ratios.

Honda CB750 (890cc 67mm) Refurbished Cylinder and Piston Kit (Early Cylinder) (In stock)

These 67mm piston sets are designed for Honda CB750 (69-78 SOHC) that are using big duration and lift camshafts.
Generally used when camshaft manufactures request 12.5 or higher compression ratios.
Note: The reason we mentioned "early" cylinder is because early cylinders do not have the 8 drain dowel pins and "O" rings. These cylinders work better at times with MLS head gaskets with the added area for head gasket seal.

Lightened and balanced. Not to much, not to little.
This crankshaft is our most popular.
Micro polished and balanced with our second to none balancing procedure.
Note:
Many crankshaft folks do not remove the ball bearing blind hole plug that will trap 40+ years of sludge. We remove the ball plugs and clean.

These alternator rotors have been lightened and balanced to perfection. (Not to much. Not to little)
We have seen stock rotors and lightened rotors from the 70's era off as much as 12 to 14 grams.
So, let's say you went to expense and effort to balance your crankshaft and your rotor hanging off the end off your crank is out off balance worse than the crank.
Yes, your charging system will still work.

This is our choice of camshafts when using the above mentioned 890cc "pop top" cylinder and piston kits.

Honda CB750 Mikuni 29mm Smooth Bore Race Carburetors and Rubbers (In stock)

These 29mm Mikuni smooth bore carburetors are ultrasonically cleaned and have new "O" rings throughout the refurbished vintage carbs.
Also comes with the special rubber insulators to mount these carbs to a Honda CB750 SOHC 69-78.

RF-37 $899.00

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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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