DK00026.fm
REPAIR MANUAL
BRP-Powertrain
Effectivity: 125 MAX/125 Junior MAX/125 Mini
MAX/125 Micro MAX
Edition 2 / Rev. 0
Chapter 4
Page 21
December 01/2010
3.8) Inspection of exhaust valve (125 MAX only)
Instructions See Figure 15.
Graphic Removal of exhaust valve (125 MAX only)
Figure 15 K00023
Step Procedure
1 Clean oil or oil deposits from all parts with a suitable cleaning agent.
2 Check the smooth movement of the exhaust valve (1) in the cylinder, if appli-
cable remove carbon deposits on the outlet valve and in the cylinder.
3 Inspect condition of O-ring (2).
4 Check that the impulse bore in the valve rod housing (3) is open.
5 Inspect bellows (4) for cracks or porous areas and replace if applicable.
6 Inspect exhaust valve piston (5) for cracks or deformation by caused over-
heating and replace if applicable.
NOTES: Overheating may be caused by leaks.
7 Inspect valve cover (6) for cracks or deformation caused by overheating.
Part Function
1 Exhaust valve
2O-ring
3 Valve rod housing
4 Bellow
5 Exhaust valve piston
6 Valve cover
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