Purple Plug??

I just got done installing a K&N air filter and jet kit. The bike is all stock except for the rmovale of the baffle. I did exactly as the instrucins said, I used the 142 main the neddle in the third position, but i only turned the air screw out 2 1/2. the bike runs so much better, but i was wanting to know if something is wrong. i don't want to huet the engine. the bike is only 8 months old.

if u listend to the structions its ok, jus go up in the main till it blubbers and cuts, then back down one.

that's alot of work to keep changin the main. Is it worthe all the effort. Or can you change it withiut removin the carb.

near the choke, ther is a hex bolt, remove the hex bolt and take theplate that comes off, off, the use a jet wrench to pull the main off,easy, check the manual, it might hav that lil hatch thing.