FoxMxRiders

Member
Sep 13, 2006
4
0
I have taken the compression of my 1998 Cr125 and I have 160psi of compression.My gauge is not very acurate because of a leak but that sound like around 160psi.

My motor is freshly rebuild : Crank bearings,brand new cylinder (not rebuilded one),Honda Piston and rings

Here my mods : Boyesen reeds valves with cage,FMF Fatty with Shorty,shaved head but don't know how much

The engine have not run yet.I have my bike in my room to reassemble it and I was curious to know what is my specs compression vs my engine compression.

The compression should raise a little when the ring will be seated after the break in.

I think that it's good but want to know your opinion
 

hot125mod

Member
Jan 14, 2007
501
0
it was cut a good amount to get that kind of cyl pressure out of a 125 stock they are about 120-130. when i got my mod done it was cut .030 and mine was at 175 which is a lot and i dont have any spark plug spacers. after you break it in it may rise a few pounds if it was done right
 
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