This is the Ultimate Engine M-4RC Tuned Combo. This is the Ultimate .21 off-road Ultimate M-4R Tuned Engine which has bee designed and developed by the Modelix team. The M-4R is a 4 port engine with tuned crankshaft and represents the most powerful and speedy 1/8 off-road engine of the Ultimate Engines line, with great and linear power at both low and high R.P.M. It boasts the most advanced technology and a top level human capital that team up to further improve fuel mileage, overall performance and reliability.

The M-4R has all what an engine needs to compete against other market leading engines, but at an affordable and very competitive price for a top quality race engine.

The combo includes:
Engine- M-4R Tuned Engine
3 venturies: 6.5mm, 7.0mm & 7.5mm
Exhaust system-Ultimate EFRA 2123 pipe+manifold w/masterfix system
Clutch – Ultimate Racing Compak clutch system with aluminium shoes and 1 mm springs UR620-XA
Clutch Bell – UR 13T ventilated clutch bell with UR bearing
Air filter – Ultimate Racing air filter case pre-oiled foam

Specifications:

Displacement: 3,49 cc
R.P.M. (max power): 34.500
Practical Range: 7.000-36.500
Bore x Stroke: 16,42x16,42
Sleeve: 4 ports
Rear Ball Bearing: steel
Front Ball Bearing: steel
Crankshaft: 13 mm - turbo - tuned
Carburetor: plastic - 9 mm - reverse
Glowplug: Turbo (C6TGC)
Exhaust Position: rear
Weight: 350g
Fuel type: 25% nitro. Recommended fuel Nitrolux.