Clutch -VESPA type 6 springs (Ø=108mm, VNB4, VNB5, VNB6, GT125, GTR125, Super, TS125, VBB2T, GL125, GL150, Sprint125, Sprint 150, Super125, Super150)- 4 friction plates - 22 tooth (type Sprint)

Old clutch type with small diameter (Ø108mm) as used in the 125-150cc Vespa largeframe engines (clutch sits on the crankshaft) from about 1962 on (exception GS150). In Vespa circles this type of clutch is often called sprint clutch to distinguish it from the later PX types.

In principle it is identical in construction to the PX clutch type, but the clutch height is greater. The coupling pinion, which is easy to measure, is used here as a scale.

The coupling pinion of the Sprint models has a height of approx. 34mm, that of the later PX models only 32.5mm.

This means that the Sprint clutch type described here can only be driven with a thin (1.5mm) washer under the clutch. The PX uses a 3.3mm washer due to the lower clutch height.

outside Ø: 108mm

plates: 3

springs: 6x

pinion: 22 teeth (original Sprint 150)

sprocket height: 34mm (type Sprint)

However, it is also possible to use the newer clutch type of the PX models on the old motors with Sprint clutch. You only have to use the thicker washer of the PX models (3,3mm). This way you can also equip an oldie motor with modern clutch technology, e.g. a bgm PRO Superstrong clutch. In addition to the other washer, only a modified clutch cover (or that of a car with Ø115 clutch, Rally180, Rally200, PX200) and a minimal modification of the housing is necessary (see text notes at the corresponding clutches).

This clutch type is available with 21 or 22 teeth. Both can be used on the same primary gear without any problems. With 21 teeth the total reduction is shorter than with an original 22 teeth coupling. Ideal for shortening the gear ratio, e.g. for converting a sidecar to a sidecar.

(US)

We recommend BGM Pro Street gear oil (BGM2025, complies with specification API GL-3) as a lubricant.

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