1980 XS850 Special - Low Comression

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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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