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5
General Information
Specifications - General
Items
CM 50
Dimensions
Wheelbase
35.75” (908mm)
Wheel size
10” (254mm)
Seat height
23.9” (607 mm)
Engine
Type
2-stroke, single cylinder, reed valve
Cooling system
Liquid-cooled
Coolant
Liquid Performance
Mini Coolant or Antifreeze
Displacement
49.8 cc
Bore and stroke
39 mm x 41.7 mm, “V” head
Ignition system
Electronic, analogic advance
Spark plug
Champion 8339-1, 8332-1 hotter, 8904-1 colder
Gap 0.023” – 0.025” (0.58 – 0.64 mm)
Ignition timing
0.045” (1.14 mm) Before To Dead Center (BTDC)
Fuel type
High octane pump gasoline
RACE FUELS ARE NOT RECOMMENDED
Oil type
Cobra Venom
2-cycle Race Oil
Fuel / oil mix ratios
Between 32:1 and 40:1 (after engine Break-In)
Carburetion
14 mm Dell’Orto
Main Jet 92
Slow (Pilot) jet 55
Float Height 16mm + 0.5mm (0.63” + 0.020”)
Transmission
Speed / Clutch
Single / Cobra 3 shoe
Final drive ratio
13/38T or 14/38 T
Chain
420
Transmission / clutch oil type
Cobra Venom 3 Shoe Clutch Milk
Quantity 235 ml (8.0oz)