Well now it seems to want to run like crap, back fires out the intake and out the exhaust. took apart the carb and it was pretty nasty, put it all back together and still ran rough. finally figured out the left handle bar has a sensor of some sort above the clutch handle, looks as if that was a rear brake lever that someone took off, so I unhooked the harness and it would rev up alot better. long story short only time I got it to run perfect is when my hand was over the snorkle looking thing that comes up between your legs moreless. just lightly having the hand over that opening and she would rev to the moon and very quickly and responsive. also backfires out the exhaust and then sometimes thru the intake. I didn notice that the K&N air filter does not sit well in the holder. kinda rigged it up so it made a better mateing but still runs like crap. I noticed the main jet has a 150 I belive and it also has a big gun exhaust. any ideas ?? also how many turns out should the a/f screw be ?