PLUS.21-4BTT


   Displacement: 3,49 cc
   R.P.M. (max power): 35.000 RPM
   Practical range: 6.000-37.500 R.P.M.
   Bore x stroke: 16,26x16,80 mm
   Sleeve: 4 ports
   Rear ball bearings: steel
   Front ball bearings: steel
   Crankshaft: 14 mm - turbo - tuned
   Carburetor: plastic - 9 mm - reverse
   Glowplug: Turbo (C6TGC)
   Exhaust position: rear
   Starting: -
   Weight: 363 g
   Fuel type: 25% nitro
download-exploded-view
carburetor-setting
instruction-manual

Only available with rear and front steel ball bearings (Plus.21-4BTT/A)


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   24063    
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.


   

 

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