I have a 38cc ohc 4 stroke friction drive installed on a fixie with 700c wheels, it works great but i believe i can improve it by converting it to chain drive. Have any of you all done this? What do i need? What size drive and driven sprockets? Whats my best option on a transmission?Any and all answers would be greatly appreciated! I have also a 26" beach cruiser with a 49cc HS pushrod engine the 38cc has a way higher top speed!