This is the O.S. 21XZ-B ABC Engine with 21J2 Carburetor for 1/8 scale Off-Road Buggy Racing. ****** Because of the expressed racing nature of this engine, *****...More

This is the O.S. 21XZ-B ABC Engine with 21J2 Carburetor for 1/8 scale Off-Road Buggy Racing. ****** Because of the expressed racing nature of this engine, ****** ****** it is NOT covered by the O.S. 2 Year Warranty ****** ****** per page 8 of manual. ****** Carburetor Settings, NOTE carburetor is preset at factory and requires very small adjustments Needle Valve: Approximately 3.5 turns open from fully closed Throttle: Approximately 0.5mm open from factory setting with reducer removed Metering Needle: Rotate until slotted head is 1.5mm away from ball link body Mixture Control Valve: Rotate until slotted head is flush with carb body jxs 11/01/10 ir/jxsLess