21 Technical Data; Engine - GAS GAS TXT Racing 125 2020 Owner's Manual

21 TECHNICAL DATA

21.1
Design
Displacement (All 125 models)
Displacement (All 250 models)
Displacement (All 280 models)
Displacement (All 300 models)
Stroke (All 125 models)
Stroke (All 250 models)
Stroke (All 280 models)
Stroke (All 300 models)
Hole (All 125 models)
Hole (All 250 models)
Hole (All 280 models)
Hole (All 300 models)
Primary transmission
Clutch
Transmission
Transmission ratio
first-gear
second-gear
third-gear
fourth-gear
fifth-gear
sixth-gear
Ignition system
Spark plug
Spark plug gap
Starting aid
100

Engine

1-cylinder 2-stroke gasoline engine, water-cooled, with
membrane inlet
124.8 cm³ (7.616 cu in)
247.7 cm³ (15.116 cu in)
272.2 cm³ (16.611 cu in)
294.1 cm³ (17.947 cu in)
54.5 mm (2.146 in)
60 mm (2.36 in)
60 mm (2.36 in)
60 mm (2.36 in)
54 mm (2.13 in)
72.5 mm (2.854 in)
76 mm (2.99 in)
79 mm (3.11 in)
27:75
Multidisc clutch in oil bath/hydraulically operated
6-gear transmission, GASGAS*Four / Six System
35x27x28:16x24x23
14:36
16:35
36x26x24:14x28x24
24:27
23:28
Contactless controlled fully electronic ignition with digital
ignition adjustment
NGK BPR5 ES
0.7 ... 0.8 mm (0.028 ... 0.031 in)
Kick starter system