29
Cylinder fins (Cooling system)
Check periodically.
Clogged fins will result in poor engine cooling.
Remove the air cleaner cover and the air filter, and the spark plug lead.
Remove the three bolts of the cylinder cover.
Loosen the two mounting bolts of the cleaner case.
Lift the cylinder cover up to the cushion of the cleaner case and pull it out.
Remove dirt and dust from between fins to let cooling air pass easily.
Assemble the components in reverse order.
Do not forget to fasten the two loose bolts of the cleaner case.
Silencer
Remove the clutch cover and pull the front hand guard backwards.
Remove the spark arrester screen bolt and pull out the screen from the silencer body.
Clean carbon deposits from the silencer components.
Replace the screen if it is cracked, or has holes burned through.
Assemble the components in reverse order.
Replacement guide bar and chain
1. Cylinder
cover
2. Spark
plug
3. Three
bolts
4. Cleaner
case
5. Two
bolts
6. Cushion
7. Cylinder
fins
NOTE
Carbon deposits in silencer will cause drop in engine output.
The spark arrester screen must be checked periodically.
1. Silencer
2. Front hand guard
3. Bolt
4. Spark arrester screen
IMPORTANT
Only use replacement bars and chains specified by the manufacture or the equivalent.
Otherwise, there may be a risk of accidents and damage to the machine.
Length
cm
Guide bar
Chain
Clutch drum
(Part number)
33
Y33S21-56ML- SD
21BPX-56E
(A556-000481)
Y33S20-56ML- SD
95TXL-56E
38
Y38S21-64ML- SD
21BPX-64E
Y38R21-64AA- ST
Y38S20-64ML- SD
95TXL-64E
45
Y45S21-72ML- SD
21BPX-72E
Y45R21-72AA- ST
Y45S20-72ML- SD
95TXL-72E
50
Y50S21-80AL- SD
21BPX-80E
Y50R21-80AA- ST
Y50S20-80AL- SD
95TXL-80E