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Home Onroad RC Red Racing M7R .21 On-Road Nitro Engine

Red Racing M7R .21 On-Road Nitro Engine

Red Racing M7R .21 On-Road Nitro EngineReds Racing unveils the new M7R .21 7-Port M Series on-road nitro engine! The new engine features a lightweight design that delivers power, performance and reliability at a mid range street price. Each M7R is assembled by Mario Rossi himself to ensure the best performance. Features include an extra long stroke for more power down low, a 7 port sleeve for tons of high RPM power and excellent fuel economy, an extra long glow plug for easier tuning and reliability and a set of high quality ball bearings. Check out the rest of the details after the break.

Red M7R
Made in Japan front bearing, made in Japan glow plug, lightweight back-plate design, lightweight cooling system, flat piston, chrome steel Swiss made rear ball bearing, XL extra long stroke, high bottom torque and power for high efficiency and low fuel consumption.

High Quality Bearings
The new made in Japan 7x19x6mm front bearing is especially designed for high RPM. It features high precision, better sealing compared to metal shielded bearings, low friction and high reliability. Red’s Swiss made chrome steel rear ball bearing guarantees longer life at high temperatures.

7 Port Sleeve
The Reds M7R guarantees high power at high RPM and low fuel consumption thanks to the 7 ports ABC cylinder new timing. The M7R engine has been provided with flat and a special combustion chamber which allow to increase torque. Flat piston technology guarantees additional power at low and medium RPM preserving fuel consumption.

Extra Long Stroke
The Extra Long Stroke engine geometry gives exceptional power at low-medium RPM for a greater acceleration. M7R crankshaft is surprisingly strong and reliable thanks to our special steel and heat treatment. Our special silicone filling reduces the inertia to rotation.

Glow Plug
The Reds M7R nitro engine comes with TS7 made in Japan glow plug. This plug quarantees easier tuning and high reliability starting from the break in process.


  • Displacement: 3.5cc
  • Bore: 16.04mm
  • Stroke: 17.32mm
  • Inlet ports: 7
  • Outlet ports: 3
  • Front ball bearing dimension: 7x19x6mm
  • Rear ball bearing dimension: 14×25,4x6mm
  • Carburetor diameter: 8.0mm (optional), 9.0mm
  • Carburetor setting: 2 needle
  • Glow plug: TS7
  • Weight: 310g


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