cylinder misfire on 86 gl1200 a


Information and questions on GL1200 Goldwings (1984-1987)
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wingdean1962
Posts: 1
Joined: Fri Aug 26, 2016 11:31 am
Location: galveston tx.
Motorcycle: 1986 GL 1200 ASPENCADE

cylinder misfire on 86 gl1200 a

Postby wingdean1962 » Sun Sep 04, 2016 6:53 am



My 86 Aspy will not fire on one cylinder. carbs are good and set rich enough. It will idle if choked to start, but if I try the throttle it noses over or I get A little popping .The coil wire to that cylinder seems to be firing way too fast compared to the others. And the engine does try to run better when I tease the wire back A little. So my question is this. Is there A component on the bike that can cause erratic coil firing and restrict the fuel flow?



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julimike54
Posts: 226
Joined: Sun Feb 01, 2015 12:21 pm
Location: Euless, Texas
Motorcycle: 1986 GL1200A original owner
2016 HD FLTRU

Re: cylinder misfire on 86 gl1200 a

Postby julimike54 » Tue Sep 20, 2016 6:33 am

Could be poor electrical connection(s). Have you physically checked the dog bone fuse for cracking? 'Kill' switch contacts dirty, causing intermittent on & off condition? What ever wire you are "teasing" has a bad connection? If you get the bike to run with the choke in the 'on' position, that tends to indicate that the idle circuits of the carbs are dirty & need cleaning. Hope this is if some help.
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geraldm
Posts: 131
Joined: Fri May 15, 2015 12:07 pm
Location: pumphandle Saskatchewan ,Canada
Motorcycle: 86 gl1200 Aspencade

Re: cylinder misfire on 86 gl1200 a

Postby geraldm » Tue Sep 20, 2016 6:50 pm

Holding the high tension wire a bit from the plug intensifies the spark. As it retains the coil charge just a wee bit longer making the plug fire stronger. New plugs or not I would first swap the problem plug with one that is firing. It is also possible your compression is low in that cylinder and the same story the stronger spark will sometimes make it fire. Just a thought. Good luck


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