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80 Yamaha XS 850 discussion forum:
1980 XS850 Special - Low Comression
|1980 XS850 Special - Low Comression|
|Yamaha80xs850 said 2009-05-04 19:26|
I´m new to this discussion group.
I picked up a 1980 XS850 Special that doesn´t run.
1) Front end is bent. Have another one
2) no headlight, no front signals and no speedometer/tach/instrument panel assembly attached. I have these items too.
3) kick started is not working.
4) oil leak from oil pan
I´m hoping to get it to run. Checked compression.... 45-60psi
Valve Clearance Allowable Range:
Intake:0.11mm-0.15mm and Exhaust:0.20mm-0.25mm
My Valve Clerances:
Intake: 1) 0.10mm-0.102mm 2) 0.08mm-0.089mm 3) 0.114mm-0.127mm
Exhaust: 1) 0.18mm-0.19mm 2) 0.18mm-0.19mm 3) 0.18mm-0.19mm
The only one that is within range is Intake #3
I´m going to have someone double check my measurements.
Is it unusual that the measured cleareance is lower than the allowable range?
If I was to get the valve clearance within the proper range, would that increase my compression enough?
Is there something else to be checked also ?
Any help would be appreciated.
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