Decompression Valve - Pressure Testing - Jonsered CS 2141 Workshop Manual

Repair instructions
• Measure piston ring wear. This should not
exceed 1 mm. Use the piston to push down the
piston ring.
• The needle roller bearing is undamaged.
• The inlet manifold is undamaged.
• Pressure test the decompression valve.
• Also refer to Jonsered's Analysis guide for piston
failures, art. no. 108 07 01-01.
Decompression valve – pressure
testing
1
Connect tool 502 50 38-01 to the decompression
valve.
2
Pump up the pressure to 80 kPa (0.8 bar).
3
Wait 30 seconds.
4
The pressure should not be less than 60 kPa
(0.6 bar).
48
– English
Piston and cylinder – refi tting CS 2147,
CS 2149, CS 2150, CS 2152, CS 2156,
CS 2159
1
Lubricate the little end bearing with two-stroke oil
and insert it in the connecting rod.
2
Fit the piston with the arrow pointing towards the
exhaust port. Push in the gudgeon pin and fi t the
circlips. If replacing the cylinder, fi t the decompres-
sion valve, tightening to a torque of 12–14 Nm.