BACKFIRE
Seasoned HDF Member
Joined: Sep 2004
Posts: 6,197
Likes: 708
From: (Toronto) Canada
RE: BACKFIRE
It's hard for me to guess without seeing the bike, but first thing I would check is timing. If the exhaust valve is open too long and the intake is allowing fuel/air in you could be getting detonation in the exhaust pipe. May be a cam, chain, or a valve problem. Do a compression and leak down test. Good luck.
Road Master
Joined: Feb 2005
Posts: 978
Likes: 1
From:
RE: BACKFIRE
Check the intake manifold gaskets! I melted a gasket crossing AZ in 113 degree heat....easy fix if that's the case...spray some starter fluid on the intake gasket seal and if it dies...there ya go!
Seasoned HDF Member
Joined: Jan 2005
Posts: 21,949
Likes: 6
From: My house
RE: BACKFIRE
Was the bike starting and running good, except for the backfire on decel or were there any other problems, before the bike would'nt start? It may be something as simple as fouled plugs.
Road Warrior
Joined: Dec 2004
Posts: 1,726
Likes: 12
RE: BACKFIRE
Sounds like a rich (fat) running condition,, and more than likely fouled the plugs. I would check the slide needle in the carb to make sure it is properly seated in the diaphram. Keep us posted.
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Road Master
Joined: Feb 2005
Posts: 978
Likes: 1
From:
RE: BACKFIRE
Did you, by any chance, fuel up anyplace different lately?
A few years ago in WV, I picked up a tank full of "slop gas"...gas that was mixed with diesel fuel...the scoot smoked a lot and fouled the plugs and messed up the flaot bowl and jets. Just another possibility.........
A few years ago in WV, I picked up a tank full of "slop gas"...gas that was mixed with diesel fuel...the scoot smoked a lot and fouled the plugs and messed up the flaot bowl and jets. Just another possibility.........
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3rd Gear
Joined: Mar 2005
Posts: 7
Likes: 0
RE: BACKFIRE
I've owned it about a month and road about 50 miles total, the guy a brought it from said it was filled with gas last during the summer, so the last 10 miles I put stabo in with a full tank.
Road Master
Joined: Feb 2005
Posts: 785
Likes: 1
From: Harford County, Maryland
RE: BACKFIRE
I would drop a new set of plugs in it right off the bat, and ck the plug wires; easiest to ck at night - see if there's a light show going on, otherwise a meter is needed if there isn't an obvious problem. Next I would ck over the general tune condition (fuel filter, timing, carb, etc.)
