Join Date: 09-07-2007
Location: A Canadian now back in Canada.
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Re: sputter/stumble under 2500 rpm
Hard to diagnose something based simply on a description, but my initial reaction is that maybe you should simply keep the revs up. I can't image riding at less that 5000 rpm, except in downtown traffic when still in first gear.
Did the bike ever spend a long time without running? like over a winter with normal fuel still in it? Maybe carbs and jets need a thorough cleaning. And how long has it been since the carbs were synchronised?
Was it rejetted for the Yoshi bolt-on?