An old Bultaco has become my 'trials' Bullet's stablemate over here, and that's prompting me to change direction on the Enfield a bit. I want to put knobby tires on and race some AHRMA vintage MX, alongside my buddies on AJS singles and Triumph 500 twins.
That means a lot of little changes and a few big ones. The biggest is probably the fact that AHRMA won't countenance the Enfield 5-speed gearboxes. Rather than swap in a 4speed, however, I'm considering locking out 5th gear, which I believe will pass tech... but I don't know how to do it.
So I come to you: Is there anyone here who can say with reasonable confidence what the easiest (and least likely to cause problems) path would be to locking out my 5th gear?
I picture a big zip-tie or a few wraps of safety wire might do the job, if wrapped and secured around just the right parts of the gearbox. But that's a very abstract idea. Thoughts anyone?