Join Date: Oct 2012
Location: Woodland Hills CA
ANything is possible BUT I had EXACTLY the same issue after my GL1500 sat for four years. I took it to my regular guy, twice, to a supposed GL1500 expert and it got better but had the flat spot. A mechanic (looked like he was not old enough to drive) in Kansas spotted the issue; a pin-hole in a diaphragm. Replaced the parts and it runs - perfect. Lots of so-called experts could not fnd the issue.