1978 750K - Starts fine but will accelerate only with choke out, even when warmed up. It won't even allow me to put in gear and pull away. I have removed the air filter assembly and cleaned out the carbs thoroughly while running with Gumout. There is about 3 gallons of premium in the tank which is a couple of months old that has Stabil in it as well as Amsoil P I. I have new points and condenser installed also. Dwell and timing set and timing advance checked.
It could be a combo of a couple of things, the float bowls could be out of whack (misaligned) or clogged main jets. These problems would require the removal of carbs and a sycronization after re-install. If you have mechanical skills this can be done in your garage,the re-sync needs to be professionally done. Hope this helps even thought it is not all good news.
Stabil gums up carbs drasin the gas and run a carb cleaner through that should fix the problem
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