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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."Only fe' collected the old way, has any value." from His Majesty O'Keefe (1954 film)
1982 GS1100G- road bike, body, seat and suspension modded
1990 GSX750F-(1127cc '92 GSXR engine) track bike, much re-engineered
1987 Honda CBR600F Hurricane; hooligan bike, restored
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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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