engine misfires

Information and questions on GL1500 Goldwings (1988-2000)
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Posts: 1
Joined: Wed Mar 06, 2013 3:10 pm
Motorcycle: 98 GOLDWING SE

engine misfires

Post by HEMTRAN »

97 GL1500 SE
backfires out right exhaust
spark plugs 2-3-6 white
1-4-5 black and little wet
disassembled carbs found clean internals float heights good

changed plugs ran fine for about 2 miles then progressively got worse, missing and backfires
not sure if secondary air injection could be involved
any suggestions

running excellent for 5 years
sat for 4 weeks now this

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Kurt J
Posts: 37
Joined: Sat Oct 28, 2017 7:47 pm
Location: Scarmento californa
Motorcycle: 2001 gl1800a

Re: engine misfires

Post by Kurt J »

DO you know what kind of condition the timing belts are in or when they where last checked?? I have heard of old belts jumping a tooth when motor was shut off. I would do a check on them and make sure all the timing marks are where they should line up.
Mind over Matter:
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Posts: 286
Joined: Tue Aug 18, 2015 2:15 pm
Location: Finland
Motorcycle: Honda GL1500-88

Re: engine misfires

Post by kane67 »

Check the carb’s choke plunger, when you push choke off. I had a case that left carb plunger stayed a bit open. Was a choke cable /carb mechanism issue.

Br, kane

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