Benelli TNT125 Service Manual

●Measure the height of camshaft [a] with a micrometer.
○Allowable limit: Height of exhaust camshaft: 29.5376
mm
Height of intake camshaft: 29.5426 mm
●
Compress the valve spring with valve spring
compression tool and remove valve cotter.
●Disassemble:
Valve upper spring seat [1]
Valve spring [2]
Valve[3]
Valve cottter [4]
Valve lower spring seat [5]
Checking Cylinder Head
●Clear the carbon deposits on the cylinder head.
●
Measure the flatness of the cylinder head joint
surface.
○Allowable limit: 0.05mm。
★
When the flatness of the cylinder head joint surface
exceeds the use limit, place a fine sandpaper on the flat
plate, make the cylinder head joint surface fit the
sandpaper and sand the surface in 8 shape.
- 214 -

Benelli TNT125 Specifications

General

Displacement	125 cc
Transmission	5-speed
Fuel System	EFI
Fuel Capacity	7.2 liters
Seat Height	780 mm
Dry Weight	116 kg
Bore x Stroke	54 mm x 54.5 mm
Starting System	Electric
Wheelbase	1215 mm
Engine Type	Single cylinder, 4-stroke, air-cooled
Front Suspension	Upside-down fork
Front Brake	Single disc
Rear Brake	Single disc
Front Tire	120/70-12
Rear Tire	130/70-12
Max Power	8.2 kW (11.1 Cv) @ 9500 rpm
Rear Suspension	Swing arm with lateral shock absorber with adjustable spring preload