TOP PERFORMANCE Maxi Kit TPR Cilinder kit + krukas – 86cc Ø50 mm Slag 44 mm – Aluminium

The new aluminium cylinder-piston kit derives from the similar unit in cast iron. To further increase the high performance of the engine, the cylinder is made in a special aluminium alloy that ensures high rigidity levels even at high temperature such the one developed under an intense use.

To obtain high dependability, the cylinder barrel features a nickel and silicon carbide coating that guarantees wear resistance. The specifi cally designed piston is made in materials that keep unaltered their mechanical and shape features even at very high temperature. Its special geometry has allowed us to obtain a light piston that reduces inertia and allows the engine to reach very high speed.

The super-fi nished piston ring, made in spheroidal graphite cast iron with chrome coating, top off this piston-cylinder assy that combines performance and dependability.

WARNING INSTALL PART NO. 9924240 EXCLUSIVELY IF MATCHED TO CRANKSHAFT 9920410

Scope of delivery:

1 Combustion chamber cover for AM6

1 Cylinder Ø 50 Racing Aluminium – Stroke 44 mm (only for part no. 9924240)

1 Cylinder Ø 50 Racing Aluminium – Stroke 39 mm (only for part no. 9924130)

1 Lightweight piston Ø 50 Racing AM6

1 Chromed piston ring Ø 50 x 1

1 Bushing for reduction Exhaust Ø 28 mm

1 Bushing for reduction Exhaust Ø 32 mm

1 Hex.head screw M14 x 1.25; L = 11 Water drain

1 Adapter for head H2O (GAS 1/8)

1 Gudgeon pin 12 x 40

2 Gudgeon pin circlip Ø 12 AC

1 Roller cage Ø 12 x 15 x 15

1 O-ring Ø 104.37 x 3.53 Shaped

1 Gasket for water drain screw Ø 14.1 x 22 x 1

1 Compression seal O-ring Ø 53.7 x 1.78 Viton 

8 Green viton O-ring Ø 7.66 x 1.78 

1 Green viton O-ring Ø 22.22 x 2.62 

1 Cylinder base gasket 

1 green viton O-ring Ø 32 x 2.5 

1 Crankshaft w/stroke 44 mm (only for part no. 9924240) 

1 Combustion chamber, 44 mm stroke (only for part no. 9924240) 

1 Combustion chamber (only for part no. 9924130) 

1 Woodruff key, 0.6 (only for part no. 9924240) 

1 Bearing SKF 6204ETN9/C3H (only for part no. 9924240) 

1 Bearing SKF 6303TN9/C3 (only for part no. 9924240)

NOTE: IT IS NECESSARY TO OPEN THE CRANKCASE TO FIT THIS CRANKSHAFT, IT IS THEREFORE RECOMMENDED TO HAVE QUALIFIED MECHANICS PERFORM THIS JOB TO AVOID OPERATION AND RELIABILITY PROBLEMS.

Stroke mm

Squish mm

Bore mm

Displacement cm3

Timing diagram                                exhaust: 190°

Timing diagram  transfer                   ports   : 130°

Compression ratio                          geometric  14,8:1  / actual 8,1:1  

Recommended spark advance          17° (*)

(*) to obtain an advance of 17°, you need to use the supplied Woodruff key.