Exhaust backfire


Information and questions on GL1500 Goldwings (1988-2000)
Post Reply
User avatar
Phunnybone
Posts: 249
Joined: Mon May 28, 2012 3:48 am
Location: Rock Hill SC
Motorcycle: 1998 GL1500 SE
1985 GL1200 LTD (undergoing re-assembly)
1985 GL1200 LTD (#2) (parting out)

Exhaust backfire

Post by Phunnybone »



Did a lot of neglected maintenance on my new to me 98SE. Two of those things were timing belts and spark plugs. I’m now getting backfires out of the left exhaust

Yes, I triple checked the marks for the belts.

Can the pulse generator be put in wrong? I couldn’t remember which way the one I had to completely remove was facing (there’s a side that looks like it has a label and a side that’s blank - so I put it the same way that the lower one faced.

If I somehow messed up and switched plug wires two and four would that cause the backfires?

Bike ran fine before (61K on the belts).


User avatar
MikeB
Posts: 3459
Joined: Fri Dec 04, 2009 12:54 pm
Location: Tacoma, WA
Motorcycle: 1998 - GL1500 Aspencade
184K Miles
2017 - GL1800 Audio Comfort
14K Miles
Contact:

Re: Exhaust backfire

Post by MikeB »

I would look at the spark plug wires first if it were me.
MikeB
1998 - GL1500 w/184,500 miles ~ 2017 - GL1800 w/13000 miles
USAF Avionics Communications Tech - 1968 - 1986 / Flight Engineer C-130E - C-141B - 1986 - 1992. Retired
Industrial Maintenance Tech - 1992 - 2014
Retired in Tacoma, WA
User avatar
ct1500
Posts: 1498
Joined: Wed Nov 10, 2010 8:09 pm
Location: Glastonbury,CT
Motorcycle: 1988 GL1500
Contact:

Re: Exhaust backfire

Post by ct1500 »

The spark plug wires are numbered. 1-3-5 front to back right side and 2-4-6 front to back left side.
Local and need repair help with your 1500, Valkyrie or ST please click contact
Nothing leaves my shop till its' perfect
This is what I do
User avatar
Phunnybone
Posts: 249
Joined: Mon May 28, 2012 3:48 am
Location: Rock Hill SC
Motorcycle: 1998 GL1500 SE
1985 GL1200 LTD (undergoing re-assembly)
1985 GL1200 LTD (#2) (parting out)

Re: Exhaust backfire

Post by Phunnybone »

MikeB wrote: Mon Nov 16, 2020 11:07 pm I would look at the spark plug wires first if it were me.
That did it! I had 2 and 4 reversed
User avatar
Elmobile
Posts: 255
Joined: Sat Aug 22, 2015 8:35 pm
Location: Bridgewater, Nova Scotia, Canada
Motorcycle: 1990 GL1500SE

Re: Exhaust backfire

Post by Elmobile »

For some reason so easy to do... They will fit just nice, don't they...
Done it when I was working on my bike 2 years ago AND I had them marked!

Oh well...
User avatar
MikeB
Posts: 3459
Joined: Fri Dec 04, 2009 12:54 pm
Location: Tacoma, WA
Motorcycle: 1998 - GL1500 Aspencade
184K Miles
2017 - GL1800 Audio Comfort
14K Miles
Contact:

Re: Exhaust backfire

Post by MikeB »

Phunnybone wrote: Tue Nov 17, 2020 2:05 pm
MikeB wrote: Mon Nov 16, 2020 11:07 pm I would look at the spark plug wires first if it were me.
That did it! I had 2 and 4 reversed
Excellent.


MikeB
1998 - GL1500 w/184,500 miles ~ 2017 - GL1800 w/13000 miles
USAF Avionics Communications Tech - 1968 - 1986 / Flight Engineer C-130E - C-141B - 1986 - 1992. Retired
Industrial Maintenance Tech - 1992 - 2014
Retired in Tacoma, WA
Post Reply