Engine
ENGINE
Specification
Desc./Quantity
Engine type Single cylinder 4-stroke Piaggio Hi-PER4
Bore x stroke 39 X 41.8 mm
Cubic capacity 49.93 cm³
Compression ratio 11.5 :1
Timing system single overhead camshaft, driven by a chain to the left side.
Depression carburettor KEIHN CVK 18
CO adjustment 3,2% ± 0,5
Engine idle 1900 ÷ 2000 rpm.
Air filter Sponge, soaked in a mixture (50% SELENIA Air Filter Oil and
50% unleaded petrol).
Starting system electric starter/kick-starter
Lubrication Engine lubrication with lobe pump (inside the crankcase),
chain-driven, and double filter: mesh and centrifugal.
Fuel supply Gravity feed, with unleaded petrol (with a minimum octane rat-
ing of 95) with carburettor.
Max. power (crankshaft) 2,5 KW (3,4 CV) at 6500 rpm.
Cooling system forced coolant circulation system
Valve clearance intake: 0.10 mm discharge: 0.15 mm
MSS Fly 50 4T Characteristics
CHAR - 9