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Ossa M.a.r. Header Pipe Removal

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I think the Mr Gasket material should work. It is only 1/16" thick so you may need to stack more than one to fill the gap. Better ask them how you are supposed to cut it.

Surely you can get the correct one from the US?

Ossaworld

Ossa Planet run by Keith Lynas - he must have one as he sells the thread repair inserts and does complete rebuilds

Hogans

If you use any kind of sealing paste in those fine threads you may come to regret it. In my MAR, I use the copper ring from In Motion which seals fine. If the ring starts to undo itself, wire it to prevent it.

  • 2 weeks later...
  • Author

I ended up going to an automotive supply store and buying an exhaust gasket (crushable metal type) for $2.50. When I got home I found out it was slightly too large in diameter to fit into the cylinder so I cut about 1/4" out of the ring and it easily bent into a smaller diameter to fit into the recess in the cylinder.

Fired the bike up for the first time today, sounded good and no exhaust leaks. I did use anti-seize on the threads and noticed the retention ring did loosen a bit after a couple of minutes of running. I'll keep an eye on it and safety wire if required.

Thanks for the tips everyone!

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