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Rotax 125 Max Retrofit Instruction

Rotax 125 Max
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Umbauanleitung/retrofit instruction 125 MAX Series
RETROFIT INSTRUCTION FOR ROTAX 125 MAX ENGINES
1. General precaution and safety information for engine reconstruction
Warning: For the best possible engine operation, compliance with the following advice
regarding reconstruction of the engine is required.
Warning: Engine operation is permitted only with equipment supplied by ROTAX.
Warning: Modifications on engine or equipment are not allowed.
2. Special tools
All packing material is recyclable and should be disposed of accordingly.
part no.
special tool
application
676035
insertion tool
for installation of piston pin circlips
676052
fixing plate
engine
877930
trestle support
engine
580130
tin wire 3 mm
inspection of squish gap
580132
tin wire 2 mm
inspection of squish gap
676110
wrench adapter
cylinder
Note: This retrofit instruction describes the most extensive reconstruction of a ROTAX kart engine
(from MICRO to MAX). For other reconstructions you can refer to the similar working steps
in this document.
Note: In case of participating in the ROTAX MAX CHALLENGE (RMC) the engine must be verified
for conformity with the technical regulations and sealed.
The serial number of the seal must be entered in the engine identity card.
Seite/page 31/59
Ausgabe/Edition 09/2014

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Rotax 125 Max Specifications

General IconGeneral
Engine typeSingle-cylinder, 2-stroke
Displacement124.8 cc
Cooling systemLiquid-cooled
Bore x Stroke54 mm x 54.5 mm
StarterElectric starter
Intake SystemReed valve
ClutchCentrifugal dry clutch
Fuel SystemCarburetor
Exhaust systemWith silencer
Maximum Power28 hp (20.5 kW) @ 11, 500 rpm
Maximum Torque21 Nm at 10, 500 rpm
GearboxDirect drive
LubricationMixture lubrication

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