I have done everything possible to fix this off idle flat spot on my stock 1200 with 28pict carb. When I mean everything, I mean replacing carb after rebuilding it twice, replacing dizzy, using an electronic ignition, doing valves, timing etc etc ad nauseum.
Today I put my hand on the heat riser tube and noticed it is cool to the touch even after 10 minutes of warm up and idling. Have I discovered my problem?? I'm hoping so. Input would be appreciated. Thanks, Courtney