
ENGINES
M2 KARTSPORT Specializes in the 250cc TAG 4 Stroke engines. Specifications
HORSE POWER RELIABILITY TORQUE
ORAL RACING 4TK

MONOCYLINDER 4 STROKE ENGINE:
Bore:
78 mm
Stroke:
52 mm
Capacity:
248.5 cm3
Conrod length:
100 mm
Clutch:
Centrifugal
Main power transmission device:
Chain
Timing device:
Two camshafts on cylinderhead
Inlet/exhaust valves:
4 valves
INLET SYSTEM:
Carburettor:
Dell'Orto 030 mm (optional: 026 038)
Air filter:
Airbox with possibility to remove filtering element
Acoustic level:
<100 dbA
COOLING SYSTEM:
Water circuit cooling device
Water pump fully integrated into engine body
IGNITION SYSTEM AND STARTER:
Electronic ignition device with variable spark advance
Backup battery and generator
Engine speed revs. limiter by software
Electrical engine starter
EXHAUST STYEM:
Exhaust silencer as per rules
Pollution as per EU rules
ENGINE BEHAVIOUR:
K1 version:
38 mm carburettor, 29.1 kW (39 CV) @ 13.000 revs/1'
K2 version:
30 mm carburettor, 26 kW (35 CV) @ 13.000 revs/1'
K3 Junior version:
20 mm carburettor, 16.7 kW (22.5 CV) @ 13.000 revs/1'
VAMPIRE VT250 V2 SPECIFICATIONS

SINGLE CYLINDER, 4-STROKE ENGINE:
Capacity:
249.83cc
Bore/stroke:
75.0/56.5mm
Compression ratio:
12.7:1
Carburettor:
Dell'Orto ? 30mm
Engine speed:
13,000 rpm
Performance:
34 HP 26.5KW at 9,250 rpm
Valve gear:
4-valve/DOHC with flat-base tappets
Lubrication:
semi-dry sump with integrated oil filter
Motor oil:
0.7 litres vampire blood
Drive train:
type 2 1 9 chain
Transmission ratio:
from 11:93 to 14:70
Cooling system:
liquid cooled, external water pump
Clutch:
SRT five plate centrifugal clutch
Ignition:
Kokusan CDI
Weight:
17.6 kg
Dimensions in mm:
L 321, W 225, H 425

| Cubic capacity Cylinders Stroke Bore valves number Timing system Valve train Carburetor Ignition Lubrication Transmission Starter |
250 cc 1 50,9 mm 78,9 mm 4 double camshaft (DOHC) timing gears by Dell’Orto digital capacitive with variable spark advance force feed lubrication at dry oil pan centrifugal clutch electric |

|
Engine type |
Single cylinder 4 stroke with balance shaft |
|
Power |
35 / 39 HP at 10'000 rpm with 30 / 34 mm carburetor |
|
Displacement |
249.6 cc |
|
Bore / Stroke |
75 / 56.5 mm |
|
Engine housing |
gravity die cast Aluminium |
|
Cylinder |
Aluminium gravity die cast with Nicasil liner |
|
Cylinderhead |
4 valves per cylinder, DOHC on rollerbearings |
|
Crankshaft |
Steel, forged, rollerbearings |
|
Piston |
Aluminium forged |
|
Conrod |
Steel, forged, rollerbearing |
|
Cooling system |
Water cooled, Waterpump integrated in engine block |
|
Lubrication system |
Integrated dry sump with diaphragm pump |
|
Ignition system |
Digital DCI with rev. Limiter |
|
Carburetor |
Dell'Orto 30 mm / 34 mm |
|
Fuel pump |
Vacuum pump integrated at the engine housing |
|
Gearbox |
Direct drive with centrifugal clutch and chain drive |
|
Dimensions |
L/W/H = 410/190/330 mm |
|
Engine weight |
15 kg including starter |
* CALL FOR CURRENT PRICING ON ALL ENGINES*