Ok, started phase two of the Indians' engine upgrade. Here I have a Harbor Freight 6.5 hp 200 cc air cooled engine other wise known as the "Greyhound" or "Honda GX 200 clone". BTW they are one sale now so get one now if you are interested. They are internally governed to not rotate past 3500 rpm. They can spin to 6500 rpm but you must do a couple of things first to keep it from blowing up, which is what I am doing now. After disassembly and removal of the mechanical RPM governor the connecting rod and the valve springs must be replaced. The connecting rod is merely adequate for 3500 rpm operation. The bearing surfaces on the crankshaft are steel, but on the connecting rod they are just machined into the aluminum. The rod is also thin and will most likely snap and go through the case. For higher rpm duty you need to upgrade to a billet aluminum connecting rod that has steel bearing surfaces for longevity. The valve springs are far too light. They need to be upgraded to 18lb springs to prevent valve float. I am not making this engine for all out power, just the ability to rev higher so the CVT transmission can spool up fully. If I were to truly go all out for all the power I could get I would also upgrade to roller rockers and a high performance cam shaft. Here is the new engine apart with the china girl cylinder for size comparison.
Here is the upright orientation of the clone engine. Normally the engine has the cylinder pointed to the rear, but I am pointing it strait up for looks. Everything is tipped 90 degrees North.
Here is a groove that I ground out to be able to drain all the engine oil out of the case. The oil drain hole is too high when tipped 90 degrees so this little channel that I made will allow most of the oil to now be drained out during oil changes.