2008 Specifications:
2-stroke, single cylinder, reed valve
Cooling system: Liquid-cooled
Coolant: Liquid Performance Mini Coolant or Antifreeze
Displacement: 49.8cc
Bore and stroke: 39mm x 41.7mm
Ignition system: Digital Quick Spin Ignition
Spark plug: Champion 8339-1, 8332-1 hotter, 8904-1 colder
Gap: 0.023”–0.025”(0.58–0.64mm)
Ignition timing: 0.080”(2.0mm) Before Top 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: 19mm Dell’Orto
Main Jet: 95
Pilot Jet: 60
Float Height: 16mm + 0.5mm (0.63”+0.020”)
Wheelbase: 39” (991mm)
Wheel size: 10”(254mm)rear, 12”(305mm)front
Seat height: 26” (660mm)
Transmission: Automatic
Final drive ratio: 14/38T
Chain: 100 links 420
Front tire: 2.50 - 12
Pressure: 16psi minimum
Rear tire: 2.75 - 10
Pressure: 16psi min.
Front fork: Cobra 30mm USD
Fork oil type: SAE 5 weight
Fork oil amount: 107 ml (3.6oz)
Rear shock: (std. settings) Compression 16 clicks out Rebound 12 clicks out