i can't get this thing to run right. i've gone up and down with mains, needles and pilots. it runs fine and about 5 min of riding maybe less, it boggs heavy and runs like it doesn't have enough fuel. i'm at the 4th clip on the needle, 42 or 45 pilot, and i just went up to a 195 main gradually going up from a 170. it starts right up and seems to respond to throttle movements fine for about a lap. then it boggs coming out of a turn or any time it goes from idle back on the gas. it takes numerous twists of the throttle to get it to rev back up, but it will not run right till after it sits for alittle. any ideas... i think i'm going to bring it to the shop. i wasted at least 4 days on it and have no clue.
i also had the engine rebuilt with a new piston and valves. so i know it's a carb issue. the carb also has a boyesen acc. pump cover.