From O.S. Engine:
The Speed 21XZ-B Spec. II Ty 110% long stroke nitro engine continues the O.S. Speed legacy, with improvements that paved the way for acclaimed driver Ty Tessmann to take first place in the Nitro Truggy division at the ROAR Fuel Off-Road National Championships. The engine is available alone, or as part of a set with a T-2090SC exhaust pipe and manifold that offers lots oftuning options for truggy racers. The Speed 21XZ-B Spec.II Ty 110% is being produced in limited quantities — findout more by visiting osengines.com.
- A real difference-maker for serious off-road racers!
- Features a 7 mm venturi insert that boosts power whilereducing fuel consumption
- The 4 mm lower cooling head lowers overall center ofgravity for improved handling
- A T2090SC exhaust pipe with 90 mm manifold isincluded with OSMG2036 for consistent low idling andexcellent mid-range power
Displacement: .213 cu in (3.49 cc)
Bore: .641 in (16.27 mm)
Stroke: .661 in (16.8 mm)
Practical RPM: 4,000-42,000
Power Output: 2.61 hp @ 34,000 rpm
Weight: 12.45 oz (353 g)
Both include: carb, inner head, P3 plug and exhaust seal ring
OSMG2036 includes: T-2090SC exhaust pipe
OSMG2037 requires: tuned pipe set
Both require: 20%-30% nitro-methane fuel