got a 1990 kx 250 that i bought off a guy. bike runs strong but smoke a good bit. its a blue smoke so i know its oil. im thinking topend rebuild b/c i can push my kickstarter down with my hand really easily. this is my first 2 stroke and i have a question on it. should i put a new topend kit in it or just new rings. i have built many car motors and 4 stroke wheeler motors. but never a 2 stroke. just wondering what everyone thought. o also it takes like 20 kicks to get it to fire. seems like quite a lot to me since my 450r kicks on the first or second kick. just a few questions and any help is greatly apreciated.