What kind of 3.5 HP push lawn mower uses a chane that can be used to make a motorbike?

you would have to get a side shaft engine a typical push mower spins at the bottom ...for example a lawnmower with a under blade compared to a edger with a side blade you would need a edger style engine you would have to get a side shaft engine a typical push mower spins at the bottom ...for example a lawnmower with a under blade compared to a edger with a side blade you would need a edger style engine