Just got the bike back to its new home after not seeing it for almost a year.

My mechanic friend suspects and air leak someplace where the carb connects to the engine or maybe in the crankcase.

All was well until I took the carb off last summer. The bike was hard starting before so I cleaned the fuel screens in the tank (well I cleaned them and then later they kinda crumbled and broke so I removed them). I also flushed particles out of the tank and replaced the formed fuel hose with a new one that did not leak.

The carb was nice and clean, but I cleaned it anyway in varsol and blew the passages out with canned air.

After I carefully reassembled everything, set the air and idle back to specs from the manual - the problem you heard started. It idles at about half throttle and bogs at full power.

I am debating doing a leak down test at the local shop but for now will look at the boot a bit more when I get some time this week.