Hi Rotaxmxr, it may be possible to weld external damage without removing the seal. Here is the complete regulation.
C2.4.1 Modifications: The engine and its ancillaries may not be modified in any way unless
otherwise indicated by these regulations or the official MSA fiche.
UNLESS IT STATES THAT YOU CAN DO IT YOU CANNOT!!!
The engine must be raced in standard form as manufactured and supplied by Rotax unless otherwise stated. Filing, grinding, polishing, surface treating, machining or lightening of any component is forbidden unless otherwise stated. The addition of material to any component is not allowed unless otherwise stated. All parts used in or on this engine must be of original manufacture or source as supplied by Rotax except where expressly allowed. The engine is to be used with air box, carburettor, fuel pump, radiator, wiring loom, ignition system and exhaust system as supplied by Rotax for the FR125 Max unless otherwise stated. Position and method of mounting the battery, wiring loom and
exhaust system are free providing they are securely fixed to the satisfaction of the meeting’s scrutineers and in accordance with MSA Regulations. Filing of crankcase to allow easy fitting of water connection is allowed. Fitting of helicoils and inserts to repair damaged threads is allowed, except for the spark plug thread in the cylinder head insert, providing such repairs are not used to derive any benefit other than rectification of damage.
Minor damage to the cylinder or crankcase may be repaired by welding but only to restore the component to the original specification.
The use of thermal barrier coatings/ceramic coatings on or in the engine or exhaust system is not allowed. Replacement connectors to repair wiring loom are permitted. Repairs to starter motor are also allowed.
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Check the Rotax's etc for antifreeze!!!!!!!!!!!!!! by 'alanrr' (04 Dec 2008 @ 15:20)
