It's almost certainly a carburetor passage or passages that you didn't get clean. These carbs are famous for that... they look clean, but somewhere where you can't see it, they're not clean.
I've always done my own carb work, but when my 250 started acting up I sent the carbs to Ducatiman here on the board, and he brought them up to like-new spec.
Last futzed with by Triple Jim; June 8th, 2021 at 02:51 PM.
|