dhz outlaw 140

ok ive done a few threads today and ive decided on the dhzs, but its my first pit bike so im not sure if i should go with 125 or the more powerful 140. I'm not sure wether the 140 is bigger than the 125, im 6 foot if that changes anything. Cheers

Sup guys today i woke up to star track callin me and telling me my bike arrived :) So i went there and picked it up and me and me mate put it together, i put oil in the engine and fired her up and the revs were way too high. When i twist the throttle the revs died down and the bike stopped. Any...