NOVAROSSI (#PLUS21-7BT) PLUS 21-7BT Off-Road Engine
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|Sleeve: The sleeve is a 7 ports design type, the best compromise to obtain a linear power supply and the minimum fuel consumption.
Long stroke : This engine's long stroke, 16.80mm with a bore of 16.26mm, allows having a bigger torque at low rpm.
Piston: The piston is realized with a new technique (microcasting) developed by Novarossi; it is stronger and lighter than standard pistons; it better keeps compression at high temperatures.
Conrod: The 7075 aluminium alloy conrod is designed with small section to decrease weight, taking care of the strength and reliability; the performances are increased thanks to the lower weight of the moving parts.
Crankshaft: The diameter has been increased to 14,5mm in order to improve the torsional resistance ; the balancing has been obtained putting one wolfram alloy insert..
Rear ball bearing : The outer diameter of 26.00mm has been adopted in order to avoid ring distorsions and to increase fatigue resistance.
Engine Size: .21
Displacement 3.49 cm3
2.62 hp 2.72 hp
R.P.M. (M.P.) 31.300 rpm 32.800 rpm
6.000÷ 38.000 rpm 6.000÷38.500 rpm
Bore x Stroke 16.26 mm x 16.80 mm
Ports nr. 7
Piston type Microcasted
Crankshaft Ø 14.5 mm
Crankshaft Type SG
Glow Plug Type Standard
Exhaust Type Rear