you are fine all my cars have pull start's but i start them with boxes and only use the pull start if i am far away from the starter box ,as far as your flywheel i dont know but if in the rare case that it does not work well with your box you can find one for cheep from AE MIP or RRP7. Yack so you broke your tz in with out a starter box I bet you have a few skinned nuckles a fresh tz is verry tight ,it is funny i have never used the pull start to start my tz I have only used it to get the piston out of the pinch py pulling it like a inch .