The absolute ultimate 200cc OHC ATC 70 performance engine. This engine modification is unique. The engine is originally an upright design based on a Honda XR200/200X. The cases are re-machined to move the head and cylinder to the front of the engine. A cover plate bolts on to where the cylinder used to mount and doubles as an inspection point for the crankshaft and gearbox. This modification enables the engine to be bolted into a Honda ATC 70 with minimal frame work. I have been doing this modification for 15 years and it has been proven to be ultra-reliable. Following is a list of this engine's features: Electric start, bearing cam, oversize inlet valve, multi-plate cam chain, long stroke, six spring heavy duty clutch, cylinder mounted cam chain adjustment. This engine has 6 hours ride time and is in perfect condition. There are no modified special cam chains or weird internal components in these engines. Everything internally is stock and readily available. So, if you want to roost all over your friends or just scare yourself silly, this is the engine for you! Can also be mounted into TRX90's or Pit Bikes. It is just two inches longer and one inch wider than a 125cc pit bike engine, but about 10 times quicker. Comes with a complete wiring harness, inlet manifold and carb and frame mod templates. Can also fit a Honda TRX70 or TRX90. *PLEASE NOTE* This is a high performance overhead camshaft engine, not one of the sluggish 200cc push rod engines for sale on Ebay.