Cylinder Heads

Dealers/vendors can recieve discounts on all centerfire heads when ordering a total of 8 heads by entering coupon code: Head-dealer

You can order any combination of heads. Total quantity of purchase must be 8 heads. Center-fire heads only. Price for heads will be 44.95 each. This special pricing is for Dealers/Vendors only.


In the early days of the 2 stroke bicycle motor, performance tuners found unacceptable wear and destruction of their China Girl engines. Before Frederic Chelminski developed the Fred Head, the catastrophic failures caused by overheating which were commonplace have now been eliminated. The sucess of this design has enticed many other vendors to emulate this cylinder head design. You will find many claims of superior performance from these other vendors, however CR Machine maintains the lead by the continuing refinement and improvement of the design. Race leaders continue to use CR Machine's winning race proven designs.

8.0cc extra low compression center fire head Cylinder head nut spring washer set
8.0cc extra low compression center fire headCylinder head nut spring washer set

Extra low compression 8.0 cc "Bonneville" head.

Cylinder head nut spring washer set

New 5.5cc slant head NEW Competition Center Fire Cylinder head
New 5.5cc slant headNEW Competition Center Fire Cylinder head

New 5.5cc slant head

New, improved performance competition cylinder head with spark plug

Stage 2  [6.0cc]Cylinder Head 66/80cc Stage 2 Cylinder Head w/Compression Release 66/80cc
Stage 2 [6.0cc]Cylinder Head 66/80ccStage 2 Cylinder Head w/Compression Release 66/80cc

The original Fred Head for ONLY $59.95! Stage 2 [6.0cc]Cylinder Head 66/80cc: For moderately advanced engines using normal pump fuel, or highly advanced engines using racing fuel.

New angle fire compression release head 6.0 - 7.0cc chambers

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Stage 2 [7.0cc]Cylinder Head 66/80cc Stage 3 Twin Plug Cylinder Head 6.0cc w/Comp Release 66/80cc
Stage 2 [7.0cc]Cylinder Head 66/80ccStage 3 Twin Plug Cylinder Head 6.0cc w/Comp Release 66/80cc

7.0 cc centerfire head for advanced engines using pump fuel.

Stage 3 Twin Plug Cylinder Head 6.0cc w/Compression Release 66/80cc:

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6.0cc Twin Plug Cylinder Head 66/80cc
6.0cc Twin Plug Cylinder Head 66/80cc

6.0cc Twin Plug Cylinder Head 66/80cc

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