Impersonating a mechanic
Join Date: Mar 2010
Location: Kennett Square, PA/Sun Valley, ID
Year: 1982 & 1985
Model: 82 GL1100-I PA/85 GL1200-A ID
Originally Posted by Sprocketrocket55
When there is a missfire it will cause backlash noise in the gears.
No problems when running, just at idle, and it seems to have corrected itself. (Well. ok, with a little help from me -- and this forum.)
I installed new plugs, put 7 oz of Seafoam in the tank, filled it up and went for a a ride. When I got back, the knock was gone. I did notice that it's idling a little over 1000 RPM now -- that's up a couple hundred, so maybe it just needed to be run more.
Anyway, thanks to all who commented. Your help is much appreciated.
82 GL1100-I -- PA
85 GL1200-A -- ID