Top Performances "Due Plus" Racing Cylinder-piston kitRef : TPF00178A / 1127340

With this new head, more of the combustion chamber comes into contact with the coolant to keep temperatures within an ideal range for improved engine efficiency. The compression ratio has also been modified to take account of the new temperature values.

Delivery contents:

• 1 ˜ 49.5 mm cylinder in special "MINACROM" cast iron (with chrome additive)
• 1 Piston ˜ 49.5 with high silicon content
• 1 chromium-plated steel piston ring, thickness 1 mm
• 1 Piston pin˜ 12 x 42 mm
• 1 Bearing for piston pin ˜ 12 x 15 x 15 mm
• 2 Circlips for piston pin
• 1 Combustion chamber
• 1 Combustion chamber cover
• 8 Green Viton O-ring ˜ 7.66 x 1.78
• 1 Green Viton O-ring ˜ 53.7 x 1.78
• 1 Green Viton O-ring ˜ 22.22 x 2.62
• 1 green Viton O-ring ˜ 28.24 x 2.62
• 1 O-ring ˜ 104.37 x 3.54
• 1 Reducer for temperature sensor
• 1 Cap M14 x 1.25
• 1 Aluminium gasket for cap M14 x 1.25
• 1 Cylinder base gasket, thickness 0.5 mm
• 1 Reducing sleeve for muffle connection (from ?˜ 28 to ?˜ 25 mm)

Bore mm: 49,5
Stroke mm: 39
Displacement cm3: 75
Flattening mm: 0,9 ±0,1
Distribution diagram: exhaust: 195° transfer ports: 128°
Compression ratio: geometric: 14.5:1 real: 7,9:1