TOP perfomances 9920590 Manual De Instrucciones página 8

No. Q.ty Description
1) 1 Cylinder in special "MINACROM" cast iron
(with chrome additive)
2) 1 Piston with high silicon content and tin insert
3) 1 Piston ring, 1 mm thick, in chromed semi trapezoidal S10
4) 1 Piston gudgeon pin with biconic drilling
5) 2 Gudgeon pin circlips
6) 1 Head in aluminium with truncated cone-shaped combustion
chamber
7) 1 Cylinder base gasket
8) 4 O-ring Ø 6.35 x 1.78
9) 1 O-ring Ø 51.50 x 1.78
10) 1 O-ring Ø 98.05 x 1.78
11) 1 Water hose union
12) 2 M5 x 14 screw securing union to head
13) 1 O-ring Ø 22.22 x 2.62
14) 2 M6 x 20 muffl er stud bolt
15) 1 Clamp Ø 16 x 25
16) 1 Clamp Ø 12 x 22
CYLINDER TECHNICAL FEATURES:
Bore:
Displacement: 69.9 cc.
Timing diagram:
Compression ratio: geometric: 14.7:1
N.B.: It is absolutely essential, if you want to obtain high performance,
to match suitably designed parts enhancing the specifi cations of this
cylinder-piston unit. Some of these parts are the following:
THE KIT CONSISTS OF:
47.6 mm
exhaust: 193°
IMPORTANT NOTES
Stroke: 39.3 mm
Squish: 0.8±0.1 mm
transfer ports: 130°
actual: 7.94:1
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