*** PLEASE Note This engine typically comes with a steel rear bearing, but our Version has a Rear Ceramic bearing.
The 7th in the JX series is the new power source for 1/8 GP buggies!We are releasing the Ninja JX21-B07 off-road engine with Ceramic rear bearing.It combines the proven track record from the B06 and earlier models to provide the best possible fuel economy and driving feel. The 16.4mmX16.4mm square stroke remains the same, but the case, carburetor, and rear cover have been changed. The PC has also been changed to provide lean rotational output characteristics and improved fuel economy.
Stock Carb Settings - low speed needle flush. high speed needle 1/2 out from flush, and mid-range needle flush
