Benelli TRK 502 Service Station Manual

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ENGINE/SPARK PLUGS
SPARK PLUG CHECK
In general, the table contains the typical conditions of spark
plug with the various degeneration causes and corresponding
solutions.
SOILED
SPARK PLUG
OVERHEATED
SPARK PLUG
Cause
Solutions Cause Solutions
Over rich mix of air/fuel
-Wrong setting of the carburetion.
Electrical system fault
-Imperfect coil connection
Specifi c riding conditions
-Prolonged periods at “minimum”
-Long sections at low speed
Spark plug too cold
The fuel/carburettor system
needs to be fi ne tuned
Check the coil connections
and relevant impedance
Èvery so often, the bike
needs to be taken to speeds
of about 80 km/h
Use a warmer spark plug, as
per specifi cations
Ignition too advanced
Insuffi cient air/fuel mix
Insuffi cient coolant and/or
lubricant
Spark plug torque too low
The spark plug used is too
hot
Adjust advanced ignition
Adjust air/fuel ratio
Add coolant and/or lubricant
Tighten to the correct torque
Use cooler spark plugs as per
specifi cations
COPY - Moto GB - Grant Martland - grantmartland@motogb.co.uk

Benelli TRK 502 Specifications

General

Displacement	500 cc
Transmission	6-speed
Fuel Tank Capacity	20 liters
Seat Height	800 mm
Wet Weight	235 kg
Bore x Stroke	69 mm x 66.8 mm
Compression Ratio	11.5:1
Clutch	Wet multi-plate
Frame	Steel trellis
Wheelbase	1505 mm
Ground Clearance	190 mm
Max Power	47.6 hp (35 kW) @ 8500 rpm
Max Torque	46 Nm @ 6000 rpm
Front Suspension	50 mm upside-down fork
Front Brake	Double floating discs, 320mm, 4-piston calipers
Rear Brake	Single 260 mm disc
Fuel System	Electronic Fuel Injection (EFI)
ABS	Dual-channel ABS
Front Tire	120/70 R17
Rear Tire	160/60 R17
Engine Type	Liquid-cooled, four-stroke, parallel twin cylinder, DOHC, 4 valves per cylinder