12 year old 4300 miles backfiring

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Jul 19, 2012 | 12:28 PM

Jimall

Thread Starter

Stage I

Joined: Jul 2012

Posts: 1

Likes: 0

From: Florida

12 year old 4300 miles backfiring

I just bought a 2000 Low Rider with 4300 miles. It cruzes at about 2000RPM but when i turn the thottle it popps & backfires out the pipes the more i turn it the more it backfires & ruffer it runs. I letoff the thottle back down to 2000RPM & it smooths out. All i have done to it is change all the fluids. when i was checking the air filter it seemed loose so took all the bolts out & the carb came off in my hand, so i put the seal & carb back on it feels ok now. But can't figure out the problem, can anyone help?

Jul 19, 2012 | 01:21 PM

Good_Apollo

Road Warrior

Joined: Jul 2010

Posts: 1,716

Likes: 5

From: Portland, OR

Change your plugs as a first step

Other than that, might be something going on with the carb or the intake or exhaust gaskets. Could be a lot of things causing popping and backfiring.

Jul 19, 2012 | 03:16 PM

Robtarra39

Road Warrior

Joined: Oct 2010

Posts: 1,554

Likes: 52

From: Ottawa Canada

maybe a new carb to intake seal, sounds like a vacuum leak

Jul 19, 2012 | 03:25 PM

Hogpro

Former Sponsor

Joined: Aug 2005

Posts: 10,968

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Have you cleaned the carb out? That would be my next step after doing plugs. A bike that old with only 4300 miels surely has some shellacked gas in it.

Jul 19, 2012 | 03:29 PM

Spud17

Road Captain

Joined: Mar 2012

Posts: 637

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From: Iowa

If I read that right and you said the carb fell off in your hand, I would replace the gasket between the carb and intake.

Jul 19, 2012 | 03:34 PM

tazzzman

Tourer

Joined: May 2012

Posts: 272

Likes: 3

From: Lake Stevens, Wa.

Quote:

Originally Posted by o_leary17

If I read that right and you said the carb fell off in your hand, I would replace the gasket between the carb and intake.

I agree, sounds like a vaccum leak. Also, check your fuel line for cracks. If the bike sat for a while, dump the gas and put in fresh. If all that doesn't cure the prob., do a thorough carb clean. Good luck!!!