There are two switches on the back of the
gearbox. One on top of the other. The bottom one is the neutral switch.
The other one gear indicator, The bottom one is the culprit.
Soak it in petrol allow to dry and then spray with Q20 and allow it
to soak in. That usually solves the problem. Kak job...
The gearbox support brackets help to stiffen up the mounting points for the rear
subframe. I have seen quite a few broken gearbox casings. Change the left cam chain tensioner for an
upgraded one. Original fastens with a 17mm spanner. Upgrade with a 15mm spanner.
Check the final drive swivel...