speedo drive gear trouble

[superbob]

my crm 250 mk3 keep shredding its plastic drive gears for the speedo what other speedo drive gears will fit it because I think that the genuine honda ones are pretty expesive. I think I have fixed the problem for the time being. However what can cause this

[rich1960]

II had a similar problem but I think I've fixed it.

Firstly I cleaned the housing really well, and made sure there was no muck/plastic left, I then inserted the two thrust washers that go in to the housing before the gear (sometimes left off) and a bit of light grease, all runs really smooth and (for now) seems OK.

Richard

[knackeredMk1]

It can be caused by muck in the drive and a stiff/twisted/worn cable.

[rich1960]

Well.....I thought the problem was sorted, but last week, after approx 1000-2000 miles the speedo has stopped again, so took it off and found that the nylon gear was worn out (again), so, I have concluded that the worm drive is f*&^%ked.

Does anyone know if you can get the worm drive out and if so, whether that part can be purchased, or is it as I suspect, a new speedo drive from Lings/Silver at 82 squid ....ouch

[superbob]

I think an xr 250 speedo drive is pretty similar so dat mite b worth lookin at am goin 2 have a look about a bike breakers 2 see if they have anything wat wud do if its in gd condition