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  • BMW/aprilia so the rotax 4/5 valve a cylinder?

    There are kits but never used them. Try the owners clubs as they may have an exchange scheme.

  • Yeah that one. Uk forums are dead now for those bikes unfortunately.

    Is one of the exhaust valves seems to keep closing up its gap every 6 to 8 k. Not massive but it is on the move. Cyl heads are cheap though so will just swap it out when it inevitable eats through the seat

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