GY6 Fuel Injection 171cc Performance Kit

This is our all in one fuel injected 171cc big bore performance kit. This kit will bring your 150cc engine from 7.5 hp to around 13 hp. The best thing about this kit is how easy everything is! We spent years dialing in this EFI kit. 3 wires installs it, and best of all it tunes it self tunes (auto tune), no need to deal with a carburetor and jetting. This kit is specifically tuned for the 171cc engine. Cold starts very easy, auto tunes for outside temperature and altitude. Just get on and ride, no baloney!  Choose your stator size in the drop down so the proper EFI magneto is supplied. This has all the performance you need put into one kit! We have spent years testing and selling other kits. Some things we liked and others we didn't. We pieced this kit together with the best of the best materials (rings, gaskets, springs, and metals). This 171cc kit (or as some call it 172cc) requires no case boring unlike some others on the market, and is also a "drop in" kit. It is the largest big bo