Rotax 125 Max User Manual

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 25
December 01/2010
Exhaust valve
piston, cover
See Figure 18.
Proceed as follows to install the exhaust valve piston and cover:
NOTES: Turn the adjustment screw (15) into the valve cover (14)
(13 clicks from inside) - this is the standard adjustment.
Step Procedure
1 Degrease the valve rod housing (6), bellows (9) and exhaust valve piston (10).
2 Pull the small hose spring (11) over the bellows.
3 Fit the bellows over the valve rod housing (6). The bead of the bellows must
engage in the groove in the valve rod housing.
4 Coat the exhaust valve piston (10) with LOCTITE 648 with a cloth and fix it to
the valve rod.
Tightening torque 3-4 Nm (27 in.lb - 35 in.lb).
5 Tension the large hose spring (12) with installation tool part no. 276070.
6 Insert compression spring (13).
7 Position valve cover (14) and adjustment screw (15).
8 Fix spring clip (16) to cylinder.
9 Fasten the spring clip over the cover and adjuster and into the groove in the
valve housing.

Rotax 125 Max Specifications

General

Engine type	Single-cylinder, 2-stroke
Displacement	124.8 cc
Cooling system	Liquid-cooled
Bore x Stroke	54 mm x 54.5 mm
Starter	Electric starter
Intake System	Reed valve
Clutch	Centrifugal dry clutch
Fuel System	Carburetor
Exhaust system	With silencer
Maximum Power	28 hp (20.5 kW) @ 11, 500 rpm
Maximum Torque	21 Nm at 10, 500 rpm
Gearbox	Direct drive
Lubrication	Mixture lubrication