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Need help again, oil smoke from right exhaust

  • Thread starter Thread starter Prez
  • Start date Start date
Steve said:
I am wondering if that might be part of the problem here with Mike's bike. The oil in the sight glass looked a little funny, so we drained it and replaced it with fresh Castrol 20w-50. The oil that we drained had a distinct minty odor to it. I only know of a couple things that smell minty that might be used: Marvel Mystery Oil and Simple Green. I can't imagine why Simple Green would be used inside an engine, leaving only MMO as the suspect.

Normally I would have used 10w-40, but we have a known excessive oil flow issue here, so I went with the thicker stuff. Not knowing how long the bike had been running previously with the smoking issue, I took the pipes off and took them down to the local car wash to clean them out. Got lots of oily water flowing out of them, so I feel a bit better about that.
While the pipes were off, I replaced the drain plug only to find that it would not tighten.
cus.gif
Took another look at the plug and found that it was a replacement, not the original, and had markings on it that said "1/2 T". Not good. It appeared to be a 1/2" oversize plug in a metric hole. I took off the oil pan, cleaned all the sludge out of it, then went to Auto Zone and found a 14mm oversize plug that cut new threads in the hole and sealed up nice and tight. Put the oil pan on, put the pipes back on, filled with new oil and fired it up. Still smokes, but not nearly as much as it did before.

After it had been running for a while, the smoke amount did not change. A friend happened to come by, saw the smoke and offered the use of his compression gauge. Overall, the numbers were not too bad, but they went up considerably 'wet', so it's probably time to check the cylinder bore size, then order rings or pistons to match.
banghead.gif
Click to expand...
Suckage. BUT, depending on the cost of a mic of the bores, and if its just rings (which im guessing as long as things are round, we're good, an out of round bore would have been mirrored on one side of the bore and not as bad on the other no?) its definately worth fixing. The bike is too nice otherwise.
 
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