JD Jetting offer a wide range of carburetor tuning options, helping to get the best performance out of your carb equipped dirt bike. Whether your off road moto features a Keihin or Mikuni OEM or aftermarket carby, you can achieve professional high performance results with the addition of a JD jetting kit. These dyno proven jet kits have been developed to allow for a range of popular settings to offer the best performance at multiple altitudes - from sea level to high altitude extreme enduros.  Whether you are on a KTM250 2 stroke, a Suzuki DRZ400E or a Honda CRF450R, a James Dean Custom JD Jetting jet kit others a variety of factory needle options to assist in helping even the home tuner improve the throttle response of their machine.