Os XZ-R 21Speed 1/8th track motor

This competition engine has been specially developed to aim for the top of the 1/8 thermal track ranking. The black anodized casing has a carefully designed intake and exhaust. The DLC plated crankshaft features a tungsten ballast and machined lumens to reduce intake resistance. The carburetor is equipped with a new needle and a steel insulator which allows for richer running. All these factory settings allow you to deliver more torque when accelerating.

Evolution with torque optimization Based on the MAX-21XZ-R, the shape of the exhaust is even better studied and the needle is a new design which increases the torque and acceleration when starting and exiting corners. Small diameter cooling cylinder head to lower the center of gravity.

Technical specifications:

Cylinder: 3.49 cm3
Bore: 16.27 mm
Stroke: 16.8mm
Useful speed: 4,000 to 45,000 rpm
Power: 2.87 hp at 33,000 rpm
Weight: 338g