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1340 BLOW BY
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philshd
New User
| Posts: 1
| Joined: 07/08
Posted: 07/14/08
06:40 AM
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Rebuilt .05 over with new pistons etc.very hard starting and after 5 minutes or so starts farting and popping. Just replaced ignition mod.,new S&S shorty etc.Took out the timing plug on the crankcase.and seemed to start right away but with very exessive blowby.How much is normal and what may cause this?
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LA_Dave
New User
| Posts: 3
| Joined: 07/08
Posted: 07/29/08
10:04 AM
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Sounds like a combination of things going on here...
Blow-by sounds like the breather-timing on the oil-pump is out of whack. That would probably be one of the key places to look...
But, when you're talking about "Blow-by" and the time plug, there's a lot of splashed oil in that area too. It might not be blow-by...
Your best bet is to do a leak-down and compression test to see if it is actually blow-by..
Farting and popping could be the timing, the ignition module, or the carb.
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Wolfe1
New User
| Posts: 11
| Joined: 03/08
Posted: 08/02/08
09:38 AM
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Crank position sensor good? Not sure what bike we're talking about here......
Just a random thought, but it's mine.
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