Aluminum piston cylinder Ø38.95 mm MBK 51 AV10 liquid Doppler ER1

Upper engine Doppler ER1 MBK 51 AV 10

New complete piston liner kit adaptable for 50cc MBK 51 moped, Motobécane 51 and 881 with AV10 engine. Also remember to replace the piston pin needle cage of dimension 13x16x14 mm which is not supplied in the high engine kits (this bearing is sold separately).

This piston cylinder block kit includes

• 1 x cylinder block
• 1 x piston
• 1 x cylinder head
• 1 x set of seals
• 1 x segment
• 2 x circlips
• 1 x gudgeon pin

Technical characteristics and dimensions of the cylinder block kit

• Mark: Doppler
• Model: ER1 liquid
• Cylinder color: gray
• Color of cylinder head: shiny black anodized
• Cylinder material: Nikasil treated aluminum
• Cylinder head material: CNC aluminum
• Piston diameter: 38.95 mm
• Piston pin diameter: 13 mm
• Cylinder Shim Thickness: 1 mm
• 6 architecture transfers with booster exhaust
• Cylinder head without decompressor