Cracked crankcase

Got a 2012 wr450 a while ago.

Recently put on a new chain and it snapped and took out a big chunk of the crankcase, around where the shifter rod is.

I'm going to order some new cases and change everything over.

Is there any other parts i need to order? Bearings, gaskets etc. Bike has 2000km on it.

How the heck  did the chain snap?

Was your rear wheel loose?


No way to know what else you need till you open it up, but of course you will need new seals and gaskets for sure.

Probably had it on too tight?

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