BRP-Rotax
REPAIR MANUAL
INSPECTION OF THE EXHAUST VALVE (125 MAX ONLY)
Instructions See following figure.
Preparation The following preparation is required before removal.
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 applicable 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 bellow (5) for cracks or porous areas and replace if applicable.
6. Inspect exhaust valve piston (6) for cracks or deformation by caused overheating and re-
place if applicable.
7. Inspect valve cover (7) for cracks or deformation caused by overheating.
Figure 4.19: Exhaust valve
1 Exhaust valve 2
O-ring RED
3
Valve rod housing
4 Oil seal
5 Bellow 6
Valve piston
7 Valve cover
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Chapter 4
Page 20
Effectivity: 125 MAX evo, Junior MAX
evo, Mini MAX evo, Micro MAX evo
Edition - February 01 2018 /Rev. 0
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