Benelli TNT125 Service Manual

●Measure the roundness of inner wall of cylinder (inner
diameter difference between X and Y directions).
○ Allowable limit: 0.05mm.
●
Measure the cylindricity of inner wall of cylinder
(inner diameter difference between X and Y directions
in upper, middle and lower positions).
○Allowable limit: 0.05mm.
●Check the planeness of cylinder surface.
○Allowable limit: 0.05mm.
●
Measure the inner diameter [A] of connecting rod
small end.
○Allowable limit: 14.05mm.
Installation
●Install piston ring.
○Apply oil to
the piston ring and piston evenly, make
the piston ring mark side up and install it properly.
Note
Do not scratch the piston and do not break the piston
ring.
After the piston ring is installed, it can rotate freely
in the piston ring groove.
Inner diameter of small end of
connecting rod
Upper
Middle
Lower
Ruler
Feeler gauge
Cylinder
Top ring
Second ring
Oil ring
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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