Fred's Derbi Dirtkid 12 , same 50cc 4 stroke as the Dirtboy 10 just bigger wheels and longer swing arm / forks giving around 150mm extra seat height .
Fred's Derbi Dirtkid 12 , same 50cc 4 stroke as the Dirtboy 10 just bigger wheels and longer swing arm / forks giving around 150mm extra seat height .