trying to diagnose poor top end running, and find that after doing high speed plug chop (the right way, from advice here) it seems to be running much too rich: i.e. black soot on #4 plug, 1-2-3 looking black but not as sooty.
Since the PO had no air filter and gutted exhausts, maybe he up-jetted to compensate. But now that I've reinstalled an air filter and mufflers... anybody out there know the stock main jet size for a 1982 GS650GLZ? I'll go to that for a starting point.
Low speed running (up to about 1/8 throttle) is great, got the air screws fiddled right. And the mid-range jet needles are clip-adjustable, that's next.
Since the PO had no air filter and gutted exhausts, maybe he up-jetted to compensate. But now that I've reinstalled an air filter and mufflers... anybody out there know the stock main jet size for a 1982 GS650GLZ? I'll go to that for a starting point.
Low speed running (up to about 1/8 throttle) is great, got the air screws fiddled right. And the mid-range jet needles are clip-adjustable, that's next.
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