WM, Workshop Manual, K650, K700, K950, K1250, 2001-06, Power ...

5
Cylinder and piston
Unscrew the cylinder screws and lift off
the cylinder.
Dismantle the spacing piece from the
cylinder.
502 50 57-01 502 50 18-01
Unscrew the cylinder screws with key No.
502 50 57-01 (3/16”) and lift the cylinder
at an angle forwards/upwards
Place a clean cloth in the crankcase
opening to prevent dirt from dropping
down into the crankcase.
Work off the throttle wire guide and remove
the screws that hold the spacing piece to
the cylinder.
TIP!
The spacer can also be removed without
first removing the throttle cable guide.
Insert the T-spanner (502 50 18-01) into
the tapped holes for the carburettor screws
and undo the screws which hold the spacer
to the cylinder.
Inspect the spacing piece and intake pipe
for signs of cracking and other damage.
Check that the impulse channel is open.
Inspect the spacing piece and intake pipe
for signs of cracking and damage on the
sealing surfaces to the cylinder and
carburettor.
Check that the impulse channel is open.
Replace damaged parts.
Cleaning, inspection
The different parts are cleaned after dismantling:
1. Scrape off soot deposits on the piston crown.
2. Scrape off soot deposits in the cylinder's combustion chamber.
3. Scrape off soot deposits in the cylinder’s exhaust port.
NOTE!
Scrape carefully with an object which is not too sharp so that the soft aluminium parts
are not damaged.
4. Clean the decompression passage in the cylinder wall.
5. Wash all parts clean.
6. Inspect the different parts for damage and wear.
7. Check the middle piece and inlet pipe for cracking and to see if leakage has occurred,
etc.
See also the chapter ”Analysis and procedure”.
Check the piston and cylinder for seizing damage and wear.
See also the chapter ”Analysis and procedure”.
Check the piston ring for damage or fracture.
See also the chapter ”Analysis and procedure”.
Check the gudgeon pin.
– If it shows signs of bluing it should be replaced.
– If it runs too easily in the piston both the piston and piston bolt should be replaced.
Check the needle bearing. If it is discoloured or damaged it should be replaced.
Check the circlips. If they show signs of cracking or are discoloured they should be
replaced.
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