Hello. What is the length of the bush on the Matchless mainshaft. Ratchet pinion bush? Part No 184-X. Will any change in length of this affect gear shift in a CP grarbox?
This pin wears loose in the ally housing causing missed changes. The remedy i used was find a bolt shank cut to length slightly oversize from original pin and press and loktite in place. Lasted for 6 years before eventually loosening again.
I hope it solves your problem.Otherwise too much end play in your layshaft or mainshaft could cause jumping out of gears. But this happens more with the B52 box.
Hello Douglas, please let me know your email id. I clicked a few close up pics. Maybe that can help. You can send me a test mail at prataphenry@gmail.com.