wyokenn wrote on 04/26/23 at 19:35:52:It also got me thinking that there may be an airflow issue since it felt more responsive. Poked around a bit more and found that both the carb vent hoses dumped into the air intake. I had assumed that this was where they were supposed to go due to some emissions regulations. On a hunch, I took both hoses out of the airbox and took it for another ride - voila! everything worked great!
I figure that at higher throttle positions there must have been enough of a vacuum on the vent hoses to screw up the mix in the carburetor. I'm sure the carb cleanings also helped.
Looks like my problem was mostly self inflicted...
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Wow. Who would have thunk? I'm struggling to make sense of this one but hey, if it's working then more power to ya!
If the problem does come back, I would start with the slide. I had a worn one when I got my bike and it stuck during a shift and my bike topped out at 45 mph. I pulled over, fussed around with the throttle a bit and it came back to life.
Another time the bike stuck at 20 mph. I pulled the airbox and the slide was stuck. A little nudge with a screwdriver and the bike came back to life. The slide had a significant amount of wear on the slide and some of the black coating was building up on the carb body.
My bike was really clean and had 3k miles on the odometer when I got it, But who knows what the PO did with it. For all I know, he pulled the speedo cable and ran an open carb for 10k miles.