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O.S. Engine MAX-21XZ-B v2 Off-Road Race Engine
We are pleased to introduce the MAX-21XZ-B Ver. II for drivers who demand performance close to that of our flagship model, the O.S. SPEED 21XZ-B spec. II but at a more affordable price. Many top drivers around the world choose O.S., relying on the renowned linear acceleration to get the best power at the right time. We developed the MAX-21XZ-B Ver. II based on the O.S. SPEED 21XZ-B Spec. II but adopted a single-needle carburetor for easier adjustment. We use the same piston/liner and connecting rod from the flagship model, the O.S. SPEED version, in the new MAX-21XZ-B Ver. II. The crankshaft has the Tungsten counter weights similar to the O.S. SPEED, but without the ultimate DLC coating, offering superb value for money.
Features:
Performance that rivals that of the acclaimed Speed 21XZ-B Spec II
Shares the same piston, liner and con rod as the (now discontinued) Speed version
Lightening holes in the cylinder head reduce overall weight
Other enhancements include a lower CG and improved cooling
A 22B2 single needle carb makes tuning a breeze
Optimized power band
Silicone filled crankshaft with tungsten counter weights
Blue anodized head
Incredible throttle response
7mm carb reducer is included
Specifications:
Displacement: 3.49 cc
Bore: 16.27 mm
Stroke: 16.8 mm
Practical RPM range: 3.000-41.500
Power Output: 2.56 hp @ 34.000 rpm
Weight: 362 g
