KEEP-OFF.21-4


   Displacement: 3,49 cc
   R.P.M. (max power): 36.000 RPM
   Practical range: 6.000-38.000 R.P.M.
   Bore x stroke: 16,26x16,80 mm
   Sleeve: 4 ports
   Rear ball bearings: ceramic
   Front ball bearings: steel
   Crankshaft: 14 mm - turbo - tuned
   Carburetor: plastic - 9 mm - reverse
   Glowplug: Turbo (C6TGC)
   Exhaust position: rear
   Starting: -
   Weight: 360 g
   Fuel type: 25% nitro
download-exploded-view
carburetor-setting
instruction-manual

Also available on request with rear and front ceramicl ball bearings.


FEATURES

02663   08502-11   15007T   21000-2
Coolinghead:
This a 'Lighter&Lower evolution 2' type of cooling head.
It is drilled and milled out to reduce the mass of the coolinghead which sits high up in the car and thereby lowering the Center of Gravity of the engine/car.
  Sleeve:
The sleeve has 4 transfer ports , the best compromise to make a linear power supply with minimal fuel consumption combination possible.
  Crankshaft:
As this engine comes as "Factory Tuned" we have modified the crankshaft to futher improve the power output and driveability.
  Gasket:
The inner shape of the gasket has a new shape, and with that more material.Together with a change in material these gaskets are more resistant to high temperatures.
biella-R7   13020   carb-off-2reg   16607
Conrod:
The R7 conrod is made from a superlight alluminium which has been checked ultrasonic. The specific form of the R7 creates little turbulence inside the engine while running.
  Backplate:
The rear cover presents a round shape to optimize the filling and reducing the dead spaces. the steel plate is to reduce friction and to expand the lifespan of the conrod.
  Carburettor:
The carburettor of this engine is made from plastic and in "reverse" style and has a sliding throttle valve. The new three tuning needles gives a better idle and improves the ability of the engine to return to low rpm after throttling.
  Rear ball bearing:
The new ball bearing reduces the inertia of the rotating masses and increases the engine's scavenging. You can see both the ball bearing and the manufacturing process result in the picture. These novelties give an increased throttle response and a higer top speed.

 

51006M5101651020M 410214102941030
300213435036000 cand-cons-1a8off
 
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