- Location
- sparks,nv
like it says how much do i need to mill off the stock head to be in the 175-180 range for compression. need to know asap thanks
how much to mill off a stock head
- Thread starter neon bitch
- Start date
Mark44
Katie's Boss
- Location
- 100% one place
Depends on your squish. You need to measure that first you are looking for .045
Mark44
Mark44
SUPERTUNE
Race Gas Rules
- Location
- Clearwater Fl.
You can cut the stock head .045, then re-cut squish band @ 14 degrees and use a OD of 3.220 and .002 step.
Use a late model bridged head off a '98-up Superjet.
Use a 62T OEM Yamaha gasket from Yamaha.
Use a late model bridged head off a '98-up Superjet.
Use a 62T OEM Yamaha gasket from Yamaha.
SUPERTUNE
Race Gas Rules
- Location
- Clearwater Fl.
Mark, You can't get a stock head down to .045, if you cut the squish band to the piston bore size, as the OEM gasket from Yamaha is .052.
Now if you machine the top of the cylinder block and lower the deck height then you could get it to that spec.
The stock piston deck height is about -.012 down.
A stock 61x cylinder block should measure 4.682-4.684.
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