Piston/Cylinder - Determining The Mounting Clearance; Checking The Oil Pumps; Disassembling The Autodecompressor - KTM 400 EXC AUS 2011 Repair Manual

301ENGINE - WORK ON THE INDIVIDUAL PARTS
128
Piston/cYlinder - deterrnininllhe mounti!!l clearance
- Check/measure the cylinder.
(r
p. 126)
- Check/measure the piston. (r p. 127)
- The smallest piston/cylinder mounting clearance equals the smallest cylinder bore diameter minus the largest piston diameter. The
largest piston/cylinder mounting clearance equals the largest cylinder bore diameter minus the smallest piston diameter.
Guideline
Piston/cylinder - mounting clearance
Size I 0.040 ... 0.082 mm (0.00157 ... 0.00323 in)
Size
II 0.043 ... 0.085 mm (0.00169 ... 0.00335 in)
Wear limit 0.120 mm (0.00472 in)
Chackinl tha oil
pum~
• Info
I
Checking of the oil pumps is shown here using the suction pump as an example, but the procedure applies to all oil pumps.
Disassamblinllha autodacomprassor
30045\-10
- Use feeler gauge. to measure the play between the external rotor and the engine
case.
Oil pump
External rotor/engine case clear-
ance
I
S 0.20 mm (S 0.0079 in)
• If the measured value does not comply with the specification:
- Replace the oil pump or, as the case may be, engine case.
- Use feeler gauge. to measure the play between the external rotor and the internal
rotor.
Oil pump
External rotor/internal rotor clear-
I
S 0.20 mm (S 0.0079 in)
ance
• If the measured value does not comply with the specification:
- Replace the oil pump.
- Take lock ring. from the autodecompression shaft and dispose of it.
- Pull autodecompression shaft. out of the camshaft.
301ENGINE - WORK ON THE INDIVIDUAL PARTS
128
Piston/cYlinder - deterrnininllhe mounti!!l clearance
- Check/measure the cylinder.
(r
p. 126)
- Check/measure the piston. (r p. 127)
- The smallest piston/cylinder mounting clearance equals the smallest cylinder bore diameter minus the largest piston diameter. The
largest piston/cylinder mounting clearance equals the largest cylinder bore diameter minus the smallest piston diameter.
Guideline
Piston/cylinder - mounting clearance
Size I 0.040 ... 0.082 mm (0.00157 ... 0.00323 in)
Size
II 0.043 ... 0.085 mm (0.00169 ... 0.00335 in)
Wear limit 0.120 mm (0.00472 in)
Chackinl tha oil
pum~
• Info
I
Checking of the oil pumps is shown here using the suction pump as an example, but the procedure applies to all oil pumps.
Disassamblinllha autodacomprassor
30045\-10
- Use feeler gauge. to measure the play between the external rotor and the engine
case.
Oil pump
External rotor/engine case clear-
ance
I
S 0.20 mm (S 0.0079 in)
• If the measured value does not comply with the specification:
- Replace the oil pump or, as the case may be, engine case.
- Use feeler gauge. to measure the play between the external rotor and the internal
rotor.
Oil pump
External rotor/internal rotor clear-
I
S 0.20 mm (S 0.0079 in)
ance
• If the measured value does not comply with the specification:
- Replace the oil pump.
- Take lock ring. from the autodecompression shaft and dispose of it.
- Pull autodecompression shaft. out of the camshaft.