engine oil blow by question
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Road Master
Joined: Jun 2009
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From: Odessa Mo
engine oil blow by question
I bought a 09 street bob in may this year. the bike was brand new it now has 4000 miles. Every time i go to wash it i noticed that the top bend on my exhaust was really dirty, but i couldnt figure out why. well i went for a 800 mile trip this weekend and I tracked down the problem. it has what i feel a little bit exsessive blow by, here are some pictures, take into consideration this was 767 miles from thursday at noon to sunday at 5pm, i am running harley 20/50 for now at 5000 miles i am changing to redline or amsoil. also these were pretty hard miles, bike was around 3000 rpms for most of it....with a bunch of racing, i weigh 336 as of this moring(down from 357 and slowly dropping 2-5 lbs a week) bike was not loaded we had a chase, it is bone stock except for vance and hines short shots, vance and hines v02 intake and vance and hines fuel pac. does this sound normal? if so what is a fix so it isnt blowing all over my motor and pipes? thanks jshull
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From: Chesterfield, VA
I bought a 09 street bob in may this year. the bike was brand new it now has 4000 miles. Every time i go to wash it i noticed that the top bend on my exhaust was really dirty, but i couldnt figure out why. well i went for a 800 mile trip this weekend and I tracked down the problem. it has what i feel a little bit exsessive blow by, here are some pictures, take into consideration this was 767 miles from thursday at noon to sunday at 5pm, i am running harley 20/50 for now at 5000 miles i am changing to redline or amsoil. also these were pretty hard miles, bike was around 3000 rpms for most of it....with a bunch of racing, i weigh 336 as of this moring(down from 357 and slowly dropping 2-5 lbs a week) bike was not loaded we had a chase, it is bone stock except for vance and hines short shots, vance and hines v02 intake and vance and hines fuel pac. does this sound normal? if so what is a fix so it isnt blowing all over my motor and pipes? thanks jshull
Check your oil level. Too much oil is a common cause of this.
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Road Master
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From: Odessa Mo
i did my own 1000 mile service and plan to do them all, i dont think i over filled the motor but thats definatly a possiblity, and as far as the aggressive thorttle thats me, is there a fix? besides easy throttle?
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From: Chesterfield, VA
Did you use three full quarts of oil?
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Road Master
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From: Odessa Mo
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From: S.E. MO
The manual calls for 2.5 but I put in just under that. I put in the 2.5 the first oil change and had to much blow by so started going just a little under that from then on. I get very little if any, any more and the oil level is still well in the safe range.
Last edited by bberck; Sep 7, 2009 at 12:13 PM.
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From: underground
same here,2 1/4 quarts puts it a little more than halfway hot,no oil in the breather.