21 TECHNICAL DATA
100
21.1
Engine
Design
1-cylinder 2-stroke gasoline engine, water-cooled, with
membrane inlet
Displacement (All 125 models)
124.8 cm³ (7.616 cu in)
Displacement (All 250 models)
247.7 cm³ (15.116 cu in)
Displacement (All 280 models)
272.2 cm³ (16.611 cu in)
Displacement (All 300 models)
294.1 cm³ (17.947 cu in)
Stroke (All 125 models)
54.5 mm (2.146 in)
Stroke (All 250 models)
60 mm (2.36 in)
Stroke (All 280 models)
60 mm (2.36 in)
Stroke (All 300 models)
60 mm (2.36 in)
Hole (All 125 models)
54 mm (2.13 in)
Hole (All 250 models)
72.5 mm (2.854 in)
Hole (All 280 models)
76 mm (2.99 in)
Hole (All 300 models)
79 mm (3.11 in)
Primary transmission
27:75
Clutch
Multidisc clutch in oil bath/hydraulically operated
Transmission
6-gear transmission, GASGAS*Four / Six System
Transmission ratio
first-gear
35x27x28:16x24x23
second-gear
14:36
third-gear
16:35
fourth-gear
36x26x24:14x28x24
fifth-gear
24:27
sixth-gear
23:28
Ignition system
Contactless controlled fully electronic ignition with digital
ignition adjustment
Spark plug
NGK BPR5 ES
Spark plug gap
0.7 … 0.8 mm (0.028 … 0.031 in)
Starting aid
Kick starter system
