You ask, we answer - Can a hole in my crank case cover be welded?

Posted: 20 Jul 2013

DRZ400S

Tom Briggs got in touch with us recently via Facebook with a question about his bike. We asked one of our experts to provide him with some advice.

TOM ASKS:

Can I have a hole in my crank case cover welded? It's a magnesium alloy cover from a DRZ400

OUR EXPERT ANSWERS:

Yes, it can but needs to be done by a specialist who is told what material they are dealing with. This enables correct preparation of material/edges to be welded especially if a filler material is required. Any grinding of material should be treated with care because particles can ignite with the heat produced.

The casing needs to be removed from the bike for repair and cleaned before refitting. Magnesium is a strange concoction and suffers from degradation; this is why magnesium products are usually coated.

In racing applications, particularly in stressed areas, for example fork lowers and yokes, key components have a working life of only three years.

Latest Advice
  • BikeSocial is offering three lucky home mechanics the chance to WIN a Haynes manual of their choice. Enter over on our Facebook page today.
    WIN a Haynes manual of your choice! | Rewards Giveaway
  • If your fork seals leak your motorcycle will handle poorly and be unsafe. Here’s how you can fix them yourself, with our DIY guide to motorcycle maintenance
    How to replace fork seals, oil and bushes
  • If your motorcycle’s brakes aren’t working right and you’ve bled the system and checked the calipers, the master cylinder might be bad. Here’s how to fix it
    How to rebuild a motorcycle brake master cylinder
  • What is BikeSafe? Ex-police sergeant Dave Yorke talks to the leader of this unique advanced motorcycle training to find out what you can expect…
    What is BikeSafe advanced motorcycle training?