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blue smoke (Read 65 times)

kennycreed Senior Member Alliance Member Offline Posts: 348 Island Of Lewis SCOTLAND Gender:	blue smoke 10/04/08 at 21:48:07 Hi there, Is it possible for oil to leak into the cylinder from cylinder head when the bike is over on the stand. I get a cloud of blue smoke on start up, but it clears up after about sixty seconds running and after that no problem, clean exhaust when running and no oil usage..cheers,,kenny
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SavageDude Serious Thumper Alliance Member Offline Posts: 561 OC_California Gender:	Re: blue smoke Reply #1 - 10/04/08 at 22:49:48 Dude! More info on your bike so we can help you narrow down the problem. Year? Miles? Any mod on your carb lately? Does it smoke on every start?
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mick Serious Thumper Alliance Member Offline Hell-bound Posts: 7323 Dayton Oregon Gender:	Re: blue smoke Reply #2 - 10/04/08 at 22:54:00 What kind of mileage do you have on the bike? There some oil getting in there from some where,probably your valve guides are worn and you get a little drop or two leak down into the combustion chamber,cant be to much if it burns off that quick,but keep you eye on it,and your ears.
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kennycreed Senior Member Alliance Member Offline Posts: 348 Island Of Lewis SCOTLAND Gender:	Re: blue smoke Reply #3 - 10/04/08 at 23:21:50 shes got 19968 miles on her and 1990year apart from the smoke on start up evrything is fine only smokes after she has been on the stand for a few hours,,cheers,,kenny
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verslagen1 YaBB Moderator ModSquad Online Where there's a will, I want to be in it. Posts: 28884 L.A. California Gender:	Re: blue smoke Reply #4 - 10/04/08 at 23:36:33 How's the compression?
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Roadie

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No, it's not a
Harley.

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Lansing MI
Gender: male

Re: blue smoke
Reply #5 - 10/05/08 at 07:16:12

kennycreed wrote on 10/04/08 at 23:21:50:

shes got 19968 miles on her and 1990year apart from the smoke on start up evrything is fine only smokes after she has been on the stand for a few hours,,cheers,,kenny

Sounds like valve guides to me. There's enough gap and therefore it leaks down in the cylinder. Keep eye on oil, like other poster said, its probably pretty minor since it only smokes for a bit.

If you rings are worn, then the oil gets pushed into the cylinder and slips past the rings. Another way to burn oil. Compression test will tell you if its the rings most likely. (Or suggest that's the cause.)

- Roadie..

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