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 29
December 01/2010
4.3) Cylinder installation
General See Figure 20.
Special tools The following special tools and equipment are required:
Instructions Proceed as follows to install the cylinder head:
Graphic Cylinder head
Figure 20
K00102

WARNING
NOTICE
Use only the piston/cylinder pairings specified by the
table in Chapter 4 Section 3.2. All other combinations
may lead to engine damage.
Part number Description Use
Part no. 897651 LOCTITE 243 Stud bolts
Step Procedure
1 NOTES: Coat the stud bolts (1) on the longer thread end with
LOCTITE 243 and screw into the crankcase. Tightening
torque 5 Nm (44.25 in.lb).
2 Position new cylinder base gasket (0.5 mm).
3 Coat cylinder bore and piston (2) with engine oil.
4 Press piston ring into the piston with two fingers.
5 Do not damage the gasket.
Position the cylinder (3) over the piston.
6 Screw cylinder crosswise to the crankcase with the four studs. Tightening
torque 24 Nm (18 ft.lb).
NOTICE
Part Function
1 Stud bolts
2Piston
3 Cylinder
1
2
3

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