Has anybody found they have a false neutral between 3rd and 4th, also sometimes jumps out of 4th unless very positive with change. Not long finished rebuilding and wondering what I might have got wrong. Gearbox is the early Navigator type. All else seems good - exception is a slight whine in third, but happy to live with that.
Just tried my own early gearbox. Bike on the centre stand and rear wheel in the air. Engage first by lifting the gear lever by hand and it should go in with a good click as the detent plunger goes into the camplate 1st gear hole. If the gear dogs baulk the action, rotate the rear wheel slowly as you engage first gear. Then go back to neutral. Feel the action of having to draw the plunger out of the detent, slide, and then fall into the next detent position.
It sounds as though your gear lever is not moving the camplate enough to get the detent into the fourth gear detent hole.
With a good LED torch and most oil drained from the gearbox you can see the action of the gearchange pawl through the gearbox inspection cover. Are the ends of the hair spring in place? and the pawl engaging properly on the up and the down changes? You can reposition the ends of the hair spring if not in their slots. - with a thin screwdriver plus torch.
Tell us how you get on.
generally gear change is ok, just found that if not particularly "positive", prone to missing or occasionally jumping out. Looking for worries perhaps..
Andrew, If you ride a modern bike too, the gearchange action on the Lightweight will feel agricultural. That's how it is. Forget about snicking it into top, keep pressure in the gearchange until you feel it fully engage and hopefully your problems will disappear. I always blip the throttle when changing down to help things engage more smoothly in the gearbox.
Think tractor, not race bike, and you won't be disappointed.
quite right,other bike is Triumph sprint, big culture change. Have to say really enjoy the Navi, gear changes are much better than I expected, though I have to sort out oil leak in gearbox - now narrowed down to drive side. very confortable to ride and quite fast enough though still running in so will wait and see how it goes. Learning journey.