Maintenance & Technical > KX500 Original

Welding an engine case

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Adz478:
Hi guys, As you will see by the photos i have a broken mount on the Left hand side casing where the front sprocket cover mounts. The thread part of it is still attached so iam thinking of having it welded back on. My question is will the heat from the Aluminium welder effect my clutch bearings/seals and countershaft seal? Obviously it would be better to have the whole engine in bits, but the finances dont allow at this point. Any help is appreciated.

dieselbeef:
thats  diff repair..i weld alum and that will be hard to fix..not imposs but tricky...it will need to be dont with the bike on its side..probly wont need to take it apart but fer sure youll be drilling and tapping the repaired hole...

i dont run a front sprkt cover...why bother

Motoroost1:
I tig weld a fair amount of aluminum as well , and that part can certainly be repaired . However , to do it right , a fair amount of heat will go into that case and I doubt the seals will like it very much .

cobbs:
I agree with motoroost to weld aluminum you have to get it really hot and I'm pretty sure you would be saying good buy to your seals and then would have to split the cases anyway so if I were you I would just leave it till you decide to to take it apart ,that's just one of the things you have to deal with on a regular baisis (vibrations braking things) my licences plate on mine broke off I still have half of it still bolted to my bike I've never seen a licence plate break that but that's what these big bikes like to do is vibrate and brake stuff

Adz478:
Sounds like i will be leaving it until rebuild time, the only other concern was that if the bike ever threw a chain the aluminium spacer that sits underneath the sprocket cover will help protect the casing from damage. Without it, it could possibly smash the case to bits. A rare thing to happen, but i have seen it happen. Thanx everyone for your input.

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