This motor doesn't need high performance upgrades to smoke nearly 2-stroke close to. With its stock minimal profile head, speed carb, significant bore exhaust, and 80cc crank setup, this engine gets exactly the same speed as sup'ed up 66cc's- if no more! Slick Tires: Slick tires Use a easy, treadless https://bike-engine-parts26047.jts-blog.com/33900825/facts-about-chinese-made-dirt-bike-engines-revealed