CG125 Exhaust Refitting

[treeno]

Hi!

I was on my way home today when I noticed that one of the nuts holding the exhaust to the studs on the cyllinder head had somehow come off. I pressed on but by the time I got home they had both gone! So I took the exhaust off because I was planning on swapping out the gaskets in my cyllinder head for new ones anyway. When I went to refit the exhaust I noticed that the metal semi-circles that crush the exhaust gasket down when you tighten the flanged are both missing. I have tried fashioning some metal plates into the correct shape but it seems not to work as I am still getting a sort of flapping sound from the general location of where the exhaust meets the cyllinder head and I can also see a small amount of smoke there. So I am guessing I have not got an air-tight fit. This was using a new exhaust gasket by the way.

Anyway, those 'metal semi-circles' I would guess have fallen out in the road and I now have no idea what they are called or where I can get some new ones. I have searched online but can't find them. Here is a picture of the assembly:

https://i47.tinypic.com/2dchf69.jpg

Any idea what they are called and where I can find them?

Cheers

[treeno]

Never mind, they are called collars or collets and I have found them on eBay!

[bladerunner]

Aye you got the right name. Even genuine ones should only be a few quid. Always slacken off the back exhaust mount first before you tighten the front mounts to allow you a bit of "wiggle" room to make sure the exhaust header pipe and flange fits square to the new gasket.
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Current bikes...cbr929, KDX200's, Rd125lc mk2, RGV250's

[treeno]