JMCHstore Performance Carburetors For Coleman CT100U CC100X RB100 98cc Mini Bike; Massimo MB100 79cc mini bike; For Predator 3 HP (79cc) OHV Horizontal Shaft Gas Engine. For FRP Mini Dirt Bike GMB100 99cc 3hp For Coleman SK100 CK100-S CK100 GK100Go kart , Realtree RTK100 Go kart; 154F 3.0 hp OHV Engine Parts W/ Replaceable Main Jet, Direct replacement for stock carb ( stock carb Cannot change main jet ). Not only a replacement, but also provide possibility to high performance. W/ Replaceable Main Jet, Direct replacement for stock carb ( stock carb Cannot change main jet ). Not only a replacement, but also provide possibility to high performance. Carb w/ replaceable main jet for different elevation to ensure normal function of your mini bike. So your mini bike can reach the best performance & function as designed.