Installed this kit along with the Tbolt cam and spring kit on a 2019 Vader. All the parts were very nicely made and arrived in perfect condition. With a bigger carb and exhaust It provides big power increases throughout the RPM range and in the case of my Vader it lets the engine rev to the end of the tachometer with the stock CDI. I have put about 600 miles so far and for the first two hundred miles it ran better and stronger each road. I am happy to say that there is not a single oil leak, no smoke and no unusual oil use. It brings the Vader to life and is kind of a mush have upgrade.