BRP-Rotax
REPAIR MANUAL
INSTALLATION OF EXHAUST VALVE, GASKET, VALVE ROD HOUSING
Exhaust valve,
gasket, valve rod
housing
See Figure: Exhaust valve.
1. Insert exhaust valve into the slot in the cylinder head (1). Pay attention on the installation di-
rection and make sure that the valve is not ranging into the exhaust port!
2. Position the gasket (4), making sure that the impulse bore on the cylinder is not covered.
Note the installation direction!
3. Insert the valve rod housing (5).Coat both side of oil seal (6) with Engine oil and insert into
the valve rod housing.
4. Screw in 2 Allen screws M6x25 (7) and spring washers (8) onto the cylinder (1) and tighten.
5. Check the movement of the exhaust valve.
6. Tighten Allen screws (7). Tightening torque 10 Nm (90 in.lb).
Figure 4.21: Installation direction of exhaust valve
1
Cylinder head
2 Exhaust valve
3
O-ring 6x2.5 RED
4 Gasket
5
Valve rod housing assy.
6 Oil seal 6x11x3/4.5
7 Allen screw M6x25 8
Spring washers B6
______________________________________________________
INSTALLATION OF THE EXHAUST VALVE PISTON
General In order to protect the piston pin circlip from unintentional loss in the crankcase, a suitable
clean cloth should be used to cover the open cylinder bore.
Instruction See Figure: Exhaust valve piston.
1. Degrease the valve rod housing (1), bellows (2) and exhaust valve piston (3).
2. Pull the small hose spring (4) over the bellows.
Chapter 4
Page 22
Effectivity: 125 MAX evo, Junior MAX
evo, Mini MAX evo, Micro MAX evo
Edition - February 01 2018 /Rev. 0
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