backfiring????


Technical information and Q&A applicable to all years and models of Goldwings
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maestro319
Posts: 507
Joined: Thu Apr 08, 2010 9:22 pm
Location: West Chicago, IL
Motorcycle: 1986 Honda Goldwing 1200 Aspencade

backfiring????

Postby maestro319 » Tue May 25, 2010 2:43 pm



My '86 GoldWing 1200 had been sitting for a few days. Took her out today for a short trip and when I returned there was a strong exhaust smell and backfiring as I pulled into the garage.Since I am new to this, does that mean a tuneup?? New plugs?? Bad gas?? (not me, my bike) Help.



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RBGERSON
Posts: 2625
Joined: Tue Mar 09, 2010 7:57 am
Location: SCOTTSDALE, AZ
Motorcycle: 98 SE GL 1500
had every year from 75 to 83

Re: backfiring????

Postby RBGERSON » Tue May 25, 2010 3:38 pm

Back firing out the pipes is from the timing being off and the cylinder firing when the exhaust valve is open a bit..so check timing, check valve setting..one could be hanging open.
HAD LOTS OF GOLDWING 75-83
NOW INTO 1500'S..RIDING A 1998 SE

FAIR WINDS,
RB

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WingAdmin
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Location: Strongsville, OH
Motorcycle: 2000 GL1500 SE
1982 GL1100A Aspencade (sold)
1989 PC800 (wife's!)
1998 XV250 Virago (sold)
2007 Aspen Sentry Trailer

Re: backfiring????

Postby WingAdmin » Wed May 26, 2010 1:08 pm

It can also be from a faulty ignition system or spark plug. If the plug is only firing some of the time, then the times it doesn't fire, unburned fuel/air mixture is sent into the exhaust. Then the next cycle when the plug DOES fire, the hot exhaust ignites the fuel/air mixture still in the exhaust pipe from the previous cycle, and BANG.

If you have an infrared thermometer ($10 at Harbor Freight) point it at each of the exhaust manifolds coming from each cylinder and see if they are the same temperature.


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