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All good advice on the compression test, that's how I check out a 'unknown' motor. One more piece of advice; getting low readings on some/all cylinders doesn't always mean it's bad. Check the valve clearances, too tight valves can lower compression a lot. I've seen compression jump from 60 PSI to 160 with just a valve adjustment.
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Fast, Cheap, Reliable... Pick any two
'78E original owner - resto project
'78E ???? owner - Modder project FJ forks, 4-piston calipers F/R, 160/80-16 rear tire
'82 XJ rebuild project
'80SG restified, red SOLD
'79F parts...
'81H more parts...
Other current bikes:
'93 XL1200 Anniversary Sportster 85RWHP
'86 XL883/1200 Chopper
'82 XL1000 w/1450cc Buell, Baker 6-speed, in-progress project
Cage: '13 Mustang GT/CS with a few 'custom' touches
Yep, can't leave nuthin' alone...
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