Benelli TNT125 Service Manual

Cylinder pressure is too high:
 There is carbon deposition in the combustion
chamber.
Insufficient engine output power:
 Clutch is slipping
 Oil level is too high;
 Oil viscosity is too high;
 Drive system fault;
 Brake dragging.
Improperly adding lubrication oil:
 Oil level is too low;

Oil is poor or not applicable.
Oil cooler is abnormal:
 The oil cooler is blocked.
Clutch is abnormal:
Clutch is slipping:
 Friction plate wear or deformation;
 Steel wear or deformation;
 Clutch spring damage or poor elasticity;
 Clutch jacket is worn and uneven;
 Clutch master cylinder fails;

Clutch slave cylinder fails.
Clutch cannot be properly separated:
 Clutch plate is deformed or too rough;
 Clutch spring compression is uneven;
 Oil deterioration;
 Oil viscosity is too high;
 Oil level is too high;
 Clutch jacket and drive shaft is seized;
 Clutch jacket nut is loosened;
 Clutch jacket spline is damaged;

Clutch friction plate is installed incorrectly.
There is a problem with shifting
：
It is unable to engage the gear; control pedal cannot be reset
：
 Clutch cannot be separated;
 Shift fork is bent or stuck;
 Shifting gear is stuck at the shaft;
 Shifting lever is blocked

Shifting reset spring has poor flexibility or is
damaged;
 The pin of shifting reset spring is loosened;
 The spring at shifting link rod claw
 is broken;
 The shifting link rod claw
 is broken;
 The shifting claw is damaged.
Trip Stop
 The fork of shifting fork is worn or bent;
 Shifting gear groove is worn;
 The joint between the protrusion at the inner edge
of gear and concave hole is worn;
 Shifting drum groove is worn;
 Gear lever spring has poor flexibility or is
damaged;
 Shifting fork guide pin is worn;
 Drive shaft, output shaft and / or gear spline is
worn.
.
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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