MV21

Italsistem MV21 Engine

Italsistem

The Italsistem MV21 Engine is a 100cc Rotary Valve Engine

Specifications

• First Bore:
• Max Bore for 100cc:
• Max Bore for 106cc:
• Stroke:
• Conrod Length: 100mm
• Sprocket: Outboard
• Ignition: Inboard
• Main Bearing Ignition Side (Left): 6304 C4 (ID 20, OD 52 W 15)
• Main Bearing Sprocket Side (Right): 6204 C4 (ID 20, OD 47 W 14)
• Oil Seal Ignition Side (Left): 20x35x7 or 20x35x8
• Oil Seal Sprocket Side (Right): 17x28x7
• Big End Bearing:
• Little End Bearing:
• Crank Pin Diameter: 28mm
• Crank Pin Length: 46.3
• Rotary Valve Outer Diameter: 109mm
• Rotary Valve Drive: 30mm Flat to Flat, Hex Drive
• Rotary Valve Cover Gasket Inner Diameter: 110mm
• Rotary Valve Cover Bolt Hole Spacing 6x 63mm
• Exhaust Gasket: Exhaust Port Hole Width 43mm x Height 25mm Stud Holes 7mm
• Ignition Timing: ~ 2.1 BTDC
• Rotary Valve Timing: ~80/135
• Spark Plug:B10EGV or Equivalent
• Squish:
• Cylinder Layout:
• Engine Sprocket: 9t, 10t or 11t

Images