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TM Engines
The philosophy that has always distinguished TM is without doubt the choice of materials, which must always be of the highest quality, and the workmanship, even defined by some as “obsessive”, not to mention the high performance of the engines used on the standard bikes, in many cases far superior to those of the most prestigious competitors. This justifies the prices of these jewels of engineering that appeal to a niche market made up of very demanding customers. They can in fact purchase a standard product with which to race in high level competition.
All the rest is recent history.
Mini 60cc
EVO-EN-TM-MINIMAXIMUM DISPLACEMENT: 60cc
CARBURETTOR MINI KART: From 18,00mm., dish-shaped, non-electronic, with valid National homologation.
CRANKSHAFT WEIGHT INCLUDING CONNECTING ROD, EXCLUDING PISTON: 1228gr
MAXIMUM BORE: 42,1mm
NUMBER OF ADMISSION CHANNELS: 2
GUDGEON PIN: 16gr
STROKE: 43mm
WIDTH OF THE EXHAUST PORT: 28mm (Template provided by the manufacturer)
PISTON ROD: 88 mm
ADMISSION SYSTEM: Piston Port
WIDTH OF THE INTAKE PORT: 26mm (Template provided by the manufacturer)
VOLUME OF THE COMBUSTION CHAMBER: 6,8cc minimum, verifiable with insert (as per procedure)
OK Junior
EVO-EN-TM-OKJVOLUME OF CYLINDER: 124.36 cm³
NUMBER OF EXHAUST PORTS/DUCTS: 3
CONNECTING ROD:
Connecting rod centreline 104 mm
Diameter of big end 26 mm
Diameter of small end 19 mm
Min. weight of the connecting rod 86 g
BORE: (Original: 53.95 mm - Maximum: 54.08 mm)
SHAPE OF THE COMBUSTION CHAMBER: Spheric with variable radius+SQUISH
PISTON: Number of piston rings 1 or 2 - Min. weight of the bare piston including piston rings 104 g
STROKE: 54.40 mm
CRANKSHAFT:
Number of bearings 2
Diameter of bearings 2
Minimum weight of crankshaft 1753 g
GUDGEON PIN: Minimum weight 26 g
NUMBER OF TRANSFER DUCTS, CYLINDER/SUMP: 5 / 3
BALANCE SHAFT
Minimum weight of balance shaft 332 g
Percentage of balancing 25 %
OK Senior
EVO-EN-TM-OKSVOLUME OF CYLINDER: 124.36 cm³
NUMBER OF EXHAUST PORTS/DUCTS: 3
CONNECTING ROD:
Connecting rod centreline 104 mm
Diameter of big end 26 mm
Diameter of small end 19 mm
Min. weight of the connecting rod 86 g
BORE:
Original: 53.95 mm
Maximum: 54.08 mm
SHAPE OF THE COMBUSTION CHAMBER: Spheric with variable radius+SQUISH
PISTON:
Number of piston rings 1 or 2
Min. weight of the bare piston including piston rings 104 g
STROKE: 54.40 mm
CRANKSHAFT:
Number of bearings 2
Diameter of bearings 25
Minimum weight of crankshaft 1753 g
GUDGEON PIN: Minimum weight 26 g
NUMBER OF TRANSFER DUCTS, CYLINDER/SUMP: 5 / 3
BALANCE SHAFT:
Minimum weight of balance shaft 332 g
Percentage of balancing 25 %
KZ10C - Black Edition
EVO-EN-TM-KZ10CVOLUME OF CYLINDER: 124.66 cm³
NUMBER OF CARBURATION SYSTEMS: 1 carburetor
CYLINDER WALL MATERIAL: Aluminium alloy + Nicasil
BORE: (Original: 54 mm - Maximum: 54.07 mm)
NUMBER OF TRANSFER DUCTS, CYLINDER/SUMP: 5 / 3
LENGTH BETWEEN THE AXES OF THE CONNECTING ROD: 109.8
STROKE: 54.43 mm
NUMBER OF EXHAUST PORTS / DUCTS: 3
VOLUME OF COMBUSTION CHAMBER: 11 cc
COOLING SYSTEM: Acqua
SHAPE OF THE COMBUSTION CHAMBER: Sferica con raggio variabile+SQUISH
NUMBER OF PISTON RINGS: 1 o 2
KZ 10 C
EVO-EN-TM-KZ10CVOLUME OF CYLINDER: 124.66 cm³
NUMBER OF CARBURATION SYSTEMS: 1 carburetor
CYLINDER WALL MATERIAL: Aluminium alloy + Nicasil
BORE: (Original: 54 mm - Maximum: 54.07 mm)
NUMBER OF TRANSFER DUCTS, CYLINDER/SUMP: 5 / 3
LENGTH BETWEEN THE AXES OF THE CONNECTING ROD: 109.8
STROKE: 54.43 mm
NUMBER OF EXHAUST PORTS / DUCTS: 3
VOLUME OF COMBUSTION CHAMBER: 11 cc
COOLING SYSTEM: Acqua
SHAPE OF THE COMBUSTION CHAMBER: Sferica con raggio variabile+SQUISH
NUMBER OF PISTON RINGS: 1 o 2
