Benelli TNT125 Service Manual

●Remove the piston ring.
○Check the piston, piston pin and piston ring.
Note:
Do not break or damage the piston ring.
○
Clear the carbon deposits inside the piston ring
groove.
Check
●Install the piston ring.
○
Measure the clearance between piston ring and piston
ring groove.
○Allowable limit: top ring: 0.09mm.
Second ring: 0.09mm.
●
Remove the piston ring and install the piston rings at
the bottom of cylinder.
Note:
Press the piston ring in the cylinder by using the
piston head.
○Measure the piston ring joint clearance
○Allowable limit: First ring: 0.5mm
Second ring: 0.8mm.
●Measure the inner diameter of piston pin hole.
○Allowable limit: 14.04mm.
Piston
Test gauge
Push
Piston ring
Test gauge
Piston ring
Test gauge
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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