26 - English
Centrifugal clutch
13.1 Dismantling
1. Make sure that the chain brake is disengaged.
2. Remove the cylinder cover.
3. Remove the clutch cover, bar and chain.
4. Disconnect the spark plug cable. Remove the spark
plug and fit piston stop 502 54 15-01 in its place.
5. Fit the special tool 530 03 11-12 on the centrifugal
clutch. Use a socket wrench to loosen the
centrifugal clutch. See Figure 1.
6. Remove the clutch, washer, the clutch drum, washer
and bearing. See Figure 2.
13.2 Cleaning and inspection
Clean all components and check the following:
• That there is no play between the clutch shoes
and the clutch hub.
• That there is no wear on the chain drive sprocket.
• That the needle bearing is in good condition and
that there is no damage on the journal surface on
the crankshaft.
• That the friction surface on the clutch drum is
intact and that the bearing surface is undamaged.
• That the thickness on the clutch shoes is no less
than 1 mm at the most worn point. See Figure 3. If
the thickness is less, change the entire clutch.
13.3 Assembly
1. Assemble the clutch as outlined in Figure 4.
2. Grease the bearing.
3. Fit the the clutch, washer, clutch drum, washer and
bearing on the crankshaft as outlined in Figure 2.
4. Screw the clutch (anti-clockwise) until it stops.
Tighten using tool 530 03 11-12.
5. Remove the piston stop and fit the spark plug and
spark plug cable. Fit the bar, chain, clutch cover and
cylinder cover.
13 Centrifugal clutch
Fig. 1
Fig. 2
Fig. 3
Fig. 4
1 mm
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