This is New MAX.21 351R QUADRIFOGLIO .21 On/road engine.
This engine is Full tuned by Massimo Fantini!
This engine, is the best product of Max Fantini engine, with treatment DLC Long Life
The new crankshaft gives the engine a better balancing. This will reduce the vibration produced by the rotating and the alternating masses. With Special "Long Life DLC" treatment.
New type, Very hot style, used in world champion in California.
Rear Ball Bearing
Is e ceramic swiss quality.
9 Ports AAC Piston Sleeve
The new sleeve is in special ALU Material, and has 9 transfer ports and an exhaust with booster ports.
The special shape and positioning of the ports, covered by a patent, improve the internal fluid-dynamics to obtain the maximum possible performance.
The TUNED crankshaft gives the engine a better balancing. This will reduce the vibration produced by the rotating and the alternating masses. With Special "Long Life DLC" treatment.
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.
Displacement 3.5 cc
Power 2.98 HP
RPM 42,100 g / min.
Bore 16.26 mm
Stroke 16.80 mm
Cylinder AAC with coating
Piston BAR (CNC)
Shaft diameter 14.50 mm
Tree with Tungsten YES
Tree type SG
Silicone insert YES
Front Bearing Steel (OPT. Ceramic)
Rear Bearing Ceramic
Carburetor Aluminum - 9 mm - sliding
Recommended blend 16% / 25%
Weight 325 gr.