back fire
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1st Gear
Joined: May 2008
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back fire
[:@] I have a 1979 shovel it has 96 stroker just put new top end back on installed it in bike starts but backfires through back pipe rear jug only prety bad like a gun shot adjusted pushrods set timing has points what could it be need help???????????
Road Master
Joined: May 2007
Posts: 953
Likes: 8
From: Central Oregon
RE: back fire
Welcome to the HDforum 1bad..
you had a valve job done and new rings and pistons along with a bore oversize?
your doing what needs to be checked out.
Exhaust valve to tight
timing not set correctly
ignition falure of some sort
not getting enough fuel {lean condition}
then worst case bent exhaust valve
when you say the engine starts dose it start and run but back fire all of the time {every revolution of the engine} or only a few times?
I'm curious what bore and stroke to get the 96 Cu In?
what carburetor you running?
you had a valve job done and new rings and pistons along with a bore oversize?
your doing what needs to be checked out.
Exhaust valve to tight
timing not set correctly
ignition falure of some sort
not getting enough fuel {lean condition}
then worst case bent exhaust valve
when you say the engine starts dose it start and run but back fire all of the time {every revolution of the engine} or only a few times?
I'm curious what bore and stroke to get the 96 Cu In?
what carburetor you running?
Road Master
Joined: May 2007
Posts: 953
Likes: 8
From: Central Oregon
RE: back fire
It usually is the simple things!
with an intake leak it may also be difficult to keep a steady low idle.
with an intake leak it may also be difficult to keep a steady low idle.
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Thread Starter
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1st Gear
Joined: May 2008
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From:
RE: back fire
he guys thanks for replying so fast it has new push rods also and a new condensor I tried 3 different ones I have another coil Ill try that It starts runs fine than start to back fire here and there espically if i give her gas at the trottle.
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