Robin - Subaru (INSIDE DRIVE) EHO35 33.5 cc 1.60 hp Four Cycle engine with the 24 oz on board tank. This Gear & Chain Drive kit is for Bicycles. The INSIDE Drive kit comes with most of the standard mounting parts for a "Outside Drive" kit, plus we send you a 9" long G8 bolt. The INSIDE Drive kit will be harder to install then the outside drive kit. You will have to design and buy the alum angle - flat bar if you want to mount it as shown. This customer did a outstanding job mounting it. He has safety bumpers on both sides to protect the engine if the bike falls over.