The TM Series bodies are designed to accept Power Jet Kits. Power Jet Kits are normally used on carburetors in two-stroke engine applications to prevent leaning out during extended full-throttle running. Converts standard round or flat slide carbs to power jet carbs. Power jets deliver fuel at high RPM s allowing a reduction in the main jet of about 25%. This yields a better mid-range setting and better fuel-air mixture at the top end for more power and improved economy (mpg).