250-500cc 2002 Wr360 - Standard Piston Wear?

Don't worry, I measured the hole, it's well within spec...




She's cooked! Brand new piston too... 1st ride... I had a hairline crack in the head which was welded, she got hot and the weld let go, and slowly dripped coolant into the barrel while I was trying to get off the mountain and back to where I was staying. She gave up at the gate.

Lesson 1. I guess I should have bought a replacement head...

This may sound dumb but could your head / gasket if fitted have been fitted back to front/ upside down ???? as the marks on the jug dont line up where the water passages are

Man that is tough but there is a post of a member parting a 360....or could an excuse for a decomp head?:-)

Sadly, there's no decomp heads available for purchase unless you get a unit that's used or already been sold.

Yeah... Those marks look like a backwards head alright! I can assure you it wasn't though, the hole in the piston formed right under the crack in the head, which was where the decompressor had been welded in many moons ago. This is also where I had the head repaired when I bought the bike a few months ago.

I think I'd prefer the unmodified head after all the dramas I've had with this. My original 360 back in the day was a hefty thing to kick, but it seems that when this particular decomp was originally installed that it's weakened the head considerably.

I know you dont want one but decomp heads are available at R & D Husky http://www.husky.com.au/html/parts/parts.htm
It's a new casting that seems to be well engineered. I got one a while back and it's been awesome. Not cheap though

They still list them but the bloke has stopped doing them.

360 is a breeze to start anyway....if your schwartzeneger!!!

Stu

Cheers for the heads up lads. Shes going to be put in the garage for a while, I've got a ride coming up in April and have decided to lash out on a new banger, but that's another story.

So I popped the head off again, and as per Johnnys comments above, it looks like there's something amiss between the barrel and head... Or did they come from the factory this mismatched? The holes are waaay out of whack...