pdlouche-
Well spotted, found them earlier, but China and amazon together.
Motorworks (indy bmw specialist) are getting some made for them currently and just waiting on them clearing uk customs, so at some point this year.
Will have a go with some strip alloy and "seal all the things" type pasteOne of the manifold gaskets was to totally disappeared as well and can't really bodge that, will turn up in the post at some point
Exhaust studs came out nicely though, previous owner "rebuilt" engine which was always dubious over but I've put a lot on that thing, 45 to 60k of mostly city courier type abuse and engine internals have been solid.
Sat on a honda crf300, can't really tell the difference from the older 250 road bike, but would defo go a 300 rally if i was going to do the TET. Think the rally version is still less than a crf450, but both are still prety much £9k which is mental when they are barely $9k in usd
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BrickMan
Bike in for its MOT, literally on the way to the MOT maybe gave it too much and finally blew out the remains of the exhaust gasket (manifold to mid pipe area), so obviously became an MOT fail, they also spotted I'd lost a bolt off a rotor, not an issue immediately but if I was to loose another then maybe the rotor might make a break for it.
Unfortunately bike is ancient and BMW + Aprilia (Who actually make the thing) are fresh out, have been for 10 years.
Its a graphite joining ring type, dimensions 35mm OD, 30mm ID and 20 or 25mm length (can shave down the larger if needed).
Closest I could get locally was from Honda for a similar age africa twin, 35mm OD, 28mm ID and 25mm length. But despite being super careful on the lathe the boring bar dug in and exploded it. Due to the way they are made really not possible to change its OD or ID, only part off its length.
Anyone come across this material and found a place that has loads of them in various sizes?