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Compression & leakdown test
I have a 82 GS850G with 56k on it. During my general tune up and valve check I usually do a compression check. The compression was low 115-130 PSI (supposed to range between 128-171). I'm not burning any oil,(no smoke out the exhaust) and I haven't lost any power. I checked with a local bike shop mechanic and he said he wouldn't worry about the low compression if I not seeing smoke out the exhaust he did suggest a leak down test. What is an acceptable psi loss in a leak down test. I did 1/2 ounce of oil in the cylinders and the compression raised 20 PSI. Any suggestions would be great. Thanks. Bob ShawTags: None
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I have an 80 850L with 52,000 on it, not great compression but runs like a striped ape with little oil use. Run it as is.
VGustov
80 GS 1100 LT, 83 1100 G "Scruffy"
81 GS 1000 G
79 GS 850 G
81 GS 850 L
83 GS 550 ES, 85 GS 550 ES
80 GS 550 L
86 450 Rebel, 70CL 70, Yamaha TTR125
2002 Honda 919
2004 Ural Gear up
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Well, who want's to open up an engine anyway? (DIYer stampede here)
Of course you've lost power, don't be ignorant.1982 GS1100G- road bike
1990 GSX750F-(1127cc '92 GSXR engine)
1987 Honda CBR600F Hurricane
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Rensdw
Warm up the bike and then do a compression test, if you pour in oil you will screw up the test result.
Pouring in some oil is a way of testing worn piston rings, in your case: changing piston rings will probably help gain some power and compression back.
If you don't need/use the power leave it as is like all the others are saying here
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