Team Orion CRF .21 Offroad USA Spec Engine
Team Orion has come out with new engine specifically for their USA racers and fans alike. Team Orion said their existing CRF engine was just too powerful and with this .21 CRF USA Spec Offroad engine, it is now smoother while still keeping the awesome torque and at the same time better in the mileage efficiency. Great stuff indeed. 
The CRF US Spec is the result of intensive testing with the collaboration of our talented team drivers Ryan Cavalieri, Jorn Neunmann and Philipp Guschl.
ORI81594: New crankcase with modified machining process: better tolerances for more power in hot conditions.
ORI81595: New black anodized back plate for smoother throttle response.
ORI81596: Lightened head for better handling of the car, same good cooling efficiency.
ORI81597: New generation crankshaft with closer timing and smaller inside hole to increase throttle response.
ORI81598: New carburator for smoother use.
ORI81599: New venturi set of 8, 7 and 6.5 mm with CRF design for better torque and mileage.
ORI81600: Main needle support: stronger material and marked for easier tuning.
ORI81601: Throttle unibal: marked for easier tuning.
ORI81602: New bottom needle for smoohter response and better mileage.
For info, this is the same CRF engine design used by Jared Tebo to win the 2009 Silver State Nitro Challenge.
Source: Team Orion
