O.S Max 28XZ Motor

With input from top truggy drivers, O.S. has developed the ideal engine for these hybrid hot rods! The 28XZ produces more low-end torque, providing the rpm/torque balance that heavier truggies require. The result is power that’s incredibly smooth, for truggies more drivable than ever thought possible!

Features:

• The larger head aids in cooling, and is a 2-piece construction with inner head button.
• A sealed front bearing and high-performance inner bearing are part of the new crankcase design.
• The high-performance con rod features oiled bushings.
• Three needles enhance fine-tuning on the 21J slide-valve carb.
• Comes with a high-performance P3 hot turbo plug.
• The Mark Pavidas Edition Tuned Pipe (OSMG2969) is the perfect accessory for the 28XZ; flywheel sets are required (OSMG2648 for Mugen, OSMG2649 for Kyosho, both available separately) for certain truggy models.

Specifications:

• Displacement: 0.284 cu in (4.65 cc)
• Bore: 0.728 in (18.5 mm)
• Stroke: 0.681 in (17.3 mm)
• Practical rpm: 4,000-38,000
• Power Output: 3.31 hp @ 32,000 rpm
• Weight: 13.1 oz (375 g)

Included:

• O.S. 28XZ Engine
• O.S. P3 Glowplug
• Rubber covers for exhaust, fuel inlet and carb
• Silicon Exhaust Seal
• Alternate venturi insert w/Silicone seals
• Copper head shim
• Instruction manual

 

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