Author Topic: high comp pistons F2  (Read 1098 times)

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Offline kezz32

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high comp pistons F2
« on: April 21, 2015, 11:28:15 AM »
hi guys
are there any high comp pistons available for 750 sohc F2
thanks kezz

Offline Old Scrambler

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Re: high comp pistons F2
« Reply #1 on: April 21, 2015, 11:53:16 AM »
None that I know of are available 'off the shelf'.  Some have modified CB350 pistons. The 836-kits from Wiseco are advertised as High-Compression. The 12.5-1 CR-style pistons from Dynoman were designed for the K-head and will get you above 10-1 in an F2 at 762cc. For larger bores, the CB450 pistons have been modified.

Or.........install the 1mm longer rods from a CB900 with standard K or F2 pistons.........but you may have to machine the radii of the chambers to maintain clearances. Note; the K pistons will need to have the valve pockets machined to accept the larger F2 valves.     
Dennis in Wisconsin
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Offline cbr954

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Re: high comp pistons F2
« Reply #2 on: April 21, 2015, 04:03:38 PM »
Dynoman will make any type of piston you want as far as bore, compression, coatings, valve reliefs, etc.
03 CBR954RR, 72 750 chopper(970cc
F2 head), 2017 CRF450R, 2001 CR250R, 72 CB500, 79 XR250, 04 CRF50,70's soon to be rebuilt cb750 drag bike.

Offline Badluckhonda

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Re: high comp pistons F2
« Reply #3 on: April 21, 2015, 09:49:44 PM »
I got two 836 f2 pistons for sale. You just need the other two haha