I have gone and checked out a few bike and found some really nice 125s that are in my price range. Looking to spend about 1600 mabey a little more. I m 6'3 240 and dont know if the 125 will get me around a track like i am hoping. The 250 two stroke will have plenty of power but its alot harder to find one for the same price even years older than the 125s. My question is should i go with a 250 or would i be ok with a newer 125 thats already moded that i would eventually bore out to the 144 this summer. Is the 144 going to have plenty of power? Also i am just getting back into riding and this is going to be a learning summer on the track to get jumping and all that good stuff down again. I need to consider the 125 / 250 class competition even though i will start beginer i want to be competitive and think i might get blown away if i go right for the 250. What should i do.