Knocking under load

Information and questions on GL1100 Goldwings (1980-1983)
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'80 GL1100 STD Vetter (2005-)
'93 GL1500 Aspencade (2017-)
'83 Trav-Lite Camper (2010-)
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'72 CL350 (1980-1988) sold
'78 Suzuki GS550 (1985-2005) sold
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Re: Knocking under load

Post by DenverWinger »

Doubtful it is Carburetor sync, that mainly affects the cylinder balance at idle and very light throttle. Once the throttles are opened to any degree the sync adjustment is insignificant.

A local inventor has figured a way to turn a sausage grinder backward to manufacture pigs. :lol:

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Motorcycle: 1983 GL1100A Aspencade
1984 CB550SC (Sold it :( )

Re: Knocking under load

Post by Lucky07 »

Pull the plugs and see what they look like. If it's a combustion issue you should see it there, might have a cylinder running lean/heavy or with weak spark. If all plugs are the exact same I'd be leaning towards something mechanical (not so good) but easiest first would be checking the plugs.
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