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For the KZ class

A unique first of its kind engine.


- Architecture conceived to keep the overall dimensions and weights to a minimum.
- Cylinder inclined towards the rear, to improve the suction flow.
Inlet type
- Carter with removable insert in thermally insulating material, for
contain the temperature of the aspirated mixture and improve the
volumetric efficiency.
- Resin insert modifiable in shape and volume.
- Separate lubrication between gearbox and primary transmission.
- Water-cooled gearbox to lower the oil temperature
lubricant and to contain the amount of oil.
-Domposable head into 2 parts with dome machined from solid.
- Bronze ring shown in the upper part of the cylinder, optional.
- Main bearings housed on a removable metal bushing.

Engine Information

Cilindrata 125 cc
Homologation 1/M/21
Category 125 KZ2/KZ1
Bore/stroke 54 x 54,43 mm
Max power 44 cv (DIN)
Max rpm 15000 rpm
Cooling Water
Ignition PVL 105-458
Transmission 6 speed gearbox
Clutch 5 dry disks
Inlet type Reed Valve
Carburetor Dell’Orto VHSH 30
Connecting rod length 106 mm
Combustion chamber vol. Minimo 11 cc
Number of transfers 5
Number of exhaust ports 3
Main transfer opening 130,5°±1°
Height of secondary ports 126,5°±1°
Central pouring height 128,5°±1°
Discharge height 195°±1°
Expansion muffler Expansion
petrol mixture 4%
Dry weight 18 kg

homologation fiche

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Data Sheet

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