Ruddog RNX21.3 3.5ccm Nitro Off Road Competition Engine

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Ruddog RNX21.3 3.5ccm Nitro Off Road Competition Engine
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Price: $449.99

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The RUDDOG RNX21.3 3.5ccm Nitro Off Road Competition Engine is Ruddog's first high-performance nitro off-road engine. The high-quality 3.5cc competition engine features a specially developed crankcase for exceptional performance and great fuel economy with a rear ceramic main bearing and a DLC-coated and Tungsten-balanced crankshaft ensuring very high power output and reliable performance. The engine is a 3+1 port long-stroke design for high yet controllable torque especially in the lower RPM ranges, making it ideal especially for smaller or technical tracks. Other features include a 22D carburetor for smooth throttle response and high fuel economy while an O-ring equipped combustion chamber insert keeps dust away from the delicate parts of the engine. The engine is rounded out by a gold-colour cooling head whose standard height allows to run the engine leaner, extracting ever greater mileage from the engine.

  • Standard height cooling head for exceptional heat dissipation
  • Specially developed crankcase for high performance and improved mileage
  • 3+1 port design for high torque in the low to mid RPM range
  • Tungsten-balanced and DLC-coated crankshaft
  • Ceramic main bearing
  • 3-needle carburettor
  • 6.0mm and 6.5mm venturi insert included
  • Including engine storage bag
Displacement: 3.49cc
Bore: 16.27mm
Stroke: 16.80mm
Ports: 3+1
Carburettor: Sliding
Power output: 2.68PS @ 34,000RPM
RPM range: 4,000 - 42,000RPM
Weight: 352g

This product was added to our catalog on August 13, 2020

Verified Owner
Thursday, Jun 9 2022 (4 months ago)
Ruddog RNX21.3 3.5ccm Nitro Off Road Competition Engine
Great engine it definitely will get the job done but” Ruddog told me there is no rebuild kit nothing no piston rod sleeve I’m sure you can use OS parts but that’s besides the point ????