Iso · 1951–1957
Isomoto 125: history and buying advice
The same split-single, but as an ordinary motorcycle.
History
The Isomoto was the motorcycle version of the Iso 125, without the scooter panels. The split-single had two 38 mm bores and a 55 mm stroke, a Dell’Orto carburettor and a flywheel magneto. It produced 6.7 hp at 5200 rpm and had three gears with foot change.
It weighed 103 kilos ready to ride, reached almost 80 km/h and used about 2.2 litres per 100 kilometres. Later came a Sport version with four gears and a 150 cc version. Sources disagree about the end: the Nicolis museum gives 1957, an Australian magazine 1962.
Key data
| Engine | split-single two-stroke, 125 cc (2 × 38 mm bore, 55 mm stroke) |
|---|---|
| Power | 6.7 hp at 5200 rpm |
| Gears | 3 (Sport: 4) |
| Weight | 103 kg ready to ride |
| Top speed | almost 80 km/h |
| Later | 150 cc version |
What to check when buying
- Have the split-single checked by someone who knows this type.
- Fill with premix according to the instruction book.
- Check the frame and suspension.
- Parts are rare; ask a club.
SourcesOld Bike Mag: Isomoto 125 (English)Museo Nicolis: Isoscooter (English)