Started right up. It comes with oil already installed but I recommend replacing it with an oil you can trust. It's as close to a Honda as you can get. Based on reviews, it should perform and last a while. I'm using it on a Honda S65. It bolts right up. I have to convert the bike to 12 volts but not an issue. Purchased an additional harness to accommodate the wiring. Have a kill or ignition switch installed before you start this engine! It will let off some smoke as it heats up and burns off surface oil that might be left on it. The carburetor idled high out the box and needs adjustment but if you're using this engine, you should know how to do this.

Looked in the comments as for the wiring. Everything fit sound except the carb intake, sits to the side an my frame was in the way on the z20. Had to use old intake. Started first kick, carb needed a little tunning after. Clutch seems smooth. The shifter is way too long.Especially if this is for a kid. Had to change the gearing front sprocket down to a 14T might even need a 13 T. Remember y'all there's no oil in the bike. Besides that 2 weeks later bikes still running good.

Great engine, always starts first kick, the only problem is sometimes shifting into second from third it goes into neutral when you're going hard on it.

I purchased this motor 7 months ago for my sons SDG110 pit bike and it is still running strong. He rode almost daily in the summer and every weekend for sure. I have change the oil 3 times and show no metal other than what you would expect to see during new motor break in. I did have to grind a few cooling fins down around the exhaust port to fit our flange, but your experience my vary depending on the exhaust you have. My only recommendation if you buy this motor is, get a good quality clutch cable and lever. It takes a little tuning to get the clutch into the sweet spot and a sloppy no name cable and lever will make things much harder. Overall, I am very impressed with this motor and will buy again.

why tf wouldn't it come with motor mounts