Benelli TNT125 Service Manual

●Check the valve guide and remove the carbon deposits
in the valve guide with a reamer before check.
Note
Rotate the reamer clockwise and do not rotate
the reamer counterclockwise.
●Allowable limit: Measure the inner diameter of valve
guide [a]. Allowable limit:
○Intake valve：4.55mm，
○Exhaust valve：4.54mm。
●Allowable limit of clearance between valve and valve
guide:
○Intake valve：0.1mm。
○Exhaust valve：0.1mm。
Replacing Valve Guide
Note:
If the clearance between valve and valve guide
exceeds the limit, replace the valve guide. After the
valve guide
is replaced, the valve seat ring surface
must be finished.
●Put the valve guide in the freezing cavity of
refrigerator to cool it for an hour.
●Use the electric furnace or oven to heat the cylinder
head to 100-150℃.
Valve reamer
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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