Benelli TRK 502 Service Station Manual

5 - 31
HEAD DISTRIBUTION
CYLINDER CHECK
Remove:
1. Coils and Spark plugs, see the section entitled “Coil and
spark plug removal”.
2. Head timing gear cover, see chapter entitled “Head timing
gear cover removal”
3. Head see chapter entitled “Head removal”
The following procedure applies the whole cylinder group.
Check:
• the cylinder walls with a special tool Fig. A.
If there are any vertical lines, replace the cylinder and the piston
all together and the relevant clips.
Measure:
• The cylinder bore Fig. B
Make different measurements at different distances of 10-43-90
mm from the head coupling surface.
The highest value is considered when calculating wear limits.
CYLINDER bore (C) = 69 (+0.01 , +0.02)
C=Max D1 or D2 65
Limit conicity:
• Max D1= 0.5 mm
• Max D2= 0.5 mm
• Max D3= 0.5 mm
• Max D4= 0.5 mm
• Max D5= 0.5 mm
Limit eccentricity:
• Max D1= 0.5 mm
• Max D2= 0.5 mm
• Max D3= 0.5 mm
• Max D4= 0.5 mm
• Max D5= 0.5 mm
A
B
- 0.002
- 0.003
mm
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