Ø 25.95 mm
roller (125): Standard Diameter
Ø 18.9 ÷ 19.1 mm
Roller: Standard Diameter
Diameter 20.5 - 20.7 mm
roller (125): Minimum diameter allowed
Ø 18.5 mm
Roller: Minimum diameter permitted
Ø 20 mm
Refitting the driving pulley
- Preassemble the movable half-pulley with the
roller contrast plate by putting the rollers in their
housings with the larger support surface touching
the pulley according to the direction of rotation.
- Check that the roller contact plate does not have
flaws and is not damaged on the grooved edge.
- Mount the complete bushing unit on the driving
shaft.
- Fit the driven pulley/Clutch/belt unit on the en-
gine.
Engine B 125-250
ENG - 122
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