Yer not gonna believe this but i dropped the fecking bike today.
Right on the edge of a step, and now i've got a great big ding and a crack in the CDi cover.
Suggestions??

Don't drop the bike.  

HTH

Oops too late.

Thank you ian.
and now for my next trick...................

chances are it wont weld (mig or tig) & if it will it will cost you a pretty penny.
try something like plastic metal applied on the inside of the casing then sand it with fine grade wet & dry & paint it-that or find a used cover from a breakers.
HTH

I thought about the breakers but these things are like carrot meat!!
might have to be a chemical metal job.

serves me right for being a twonk....

lucky though another 2 feet backwards and it would have been off the drive with me in tow.

Try using some JB weld and some sandpaper.

I had an engine casing welded years ago. I just popped in to a local engineering firm and they charged me a tenner. The welder wasn't sure if it would weld, he said the magnesium content in the alloy might be too high, but it was fine. That was on a Kawasaki GT 750. A bottle of gas and the wire would cost you twenty quid anyway so an engineering firm may be the same.

whoops, I've just noticed the date on your post. It wasn't the bike that got nicked and trashed was it?

yep that's the one

I would leave it as is mate. Just let the mud fill the crack, no-one will notice.

ya think??

you utter bast**d Zombie-talk about kicking a man when he's down
(wish i'd thought of it 1st )

I have used a similar putty type compound like the one described by T.C called Quick Steal ( £6 approx), i use it in conjunction with a piece of aluminiumm mesh used for car body repair. Cut the aluminium mesh to sit in side the caseing and press the putty into the mesh wich bonds with the caseing, use a knife with a little water to shape the putty before it goes hard.

I then use the putty to repair any visible damage on the out side again useing a knife with a little water, when it is dry you can use a fine grade wet and dry paper with water to smooth it all off. Essential that the casing is free of oil and crap.

I repaired a GPZ750R cam chain cover this way, it had a large chunk missin and in order to get a good seal on the rim once in place i pressed it into place on the engine before it dried to give me a good mateing surface when tightened down.

No.