Backfireing


Information and questions on GL1100 Goldwings (1980-1983)
  • Sponsored Links
User avatar
tater9951
Posts: 15
Joined: Sat Jul 16, 2011 11:03 am
Motorcycle: 1982 GL 1100I Interstate

Backfireing

Postby tater9951 » Thu Aug 08, 2013 1:05 pm



I recently replaced the temperature sending unit on my 82 GL1100I I had to take the carburetor intakes loose to get to it I also loosed the clamps that go from the intake tube to the carb so I could clean them I replaced the O rings know when I started it cold with chock on it has a popping sound you can feel in the handle bars and also here in the exhaust the bike has after market mufflers and has always popped when you gear down. But this is a new one I took it out and it runs well under a load I thought it was the plug wires but there ok I'd really don't get this one it's only got 400 miles on a complete tune up. HELP!!!!
Thanks tater9951



User avatar
virgilmobile
Posts: 7644
Joined: Sun Sep 19, 2010 5:39 pm
Location: Denham Springs,La.
Motorcycle: 1988 GL1500 I
Previously owned
78 GL1000
81 GL1100
82 GL1100 I
83 GL1100 I
83 GL1100 standard
84 GL 1200 I

Re: Backfireing

Postby virgilmobile » Thu Aug 08, 2013 1:27 pm

2 parts....
"bike has after market mufflers and has always popped when you gear down."
The exhaust system on a bike is designed to provide not only a reduction of noise but it also is a part of exhaust flow control..Some call it back pressure...either way,when you deviate from the original design,performance problems can occur.
This control is a exact science..changes in it change what I call the scavenge cycle.If it's too free flowing,fuel mixture can enter the exhaust and ignite.Too much back pressure and it keeps the cylinder from filling with the right fuel mixture,a lean condition.

2nd..."But this is a new one"

If this is a new symptom never before seen and you worked on something..I suspect that what you worked on caused it.
Revisit the "O" rings..there easy to misalign and could have been split open.
Intake backfiring is a lean condition...either a vacuum leak(most likely) or a carb problem.

User avatar
baldgrimsbybiker
Posts: 12
Joined: Fri Jan 08, 2010 7:01 am
Location: Grimsby - ENGLAND
Motorcycle: 1983 GL1100AD Aspencade.
1980 CB400N

Re: Backfireing

Postby baldgrimsbybiker » Thu Aug 08, 2013 1:46 pm

Check for exhaust gasket leakage.

Just a thought - hope it helps.

User avatar
tater9951
Posts: 15
Joined: Sat Jul 16, 2011 11:03 am
Motorcycle: 1982 GL 1100I Interstate

Re: Backfireing

Postby tater9951 » Thu Aug 08, 2013 2:50 pm

Thanks for the input I went I went back over everything we did and nothing until I leak tested around the intake with carb cleaner the base were ok but all 4 top clamps are either not seated right or the rubber around the carb isn't on right .Is there a lube you can use on them that would help them seat better?
Thanks tater9951




Return to “GL1100 Information & Questions”




Who is online

Users browsing this forum: Google Adsense [Bot], Mr moe and 4 guests