Inexpensive kit assembles very easily I installed it in about an hour and a half sipping my coffee taking a few pictures as I went a trip to keep in mind when you're done is you may have to increase your pilot jet size? In my own opinion I think when you buy a cylinder and piston like this it may be best to buy a VM 22 carburetor intake neck boot kit that way you can get Mikuni getting and adjust the carburetor perfectly for the size of the new piston and believe me this engine will run a lot better with that carburetor and cylinder configuration, or you can just use the stock carburetor no problem you may have to keep an eye on your Pilots yet sometimes you do sometimes you don't but people USA has all the parts all the Jets all the carburetors all the guests that you'll ever need, just ask Rob or Vince they're the best.