Disassemble speedometer gear assembly

Tim Allman · Post by **Tim Allman** » Thu Jan 17, 2019 3:28 pm

The speedometer gear assembly on my CB77 is a bit 'crunchy' when I turn it by hand suggesting that there is some grit in it. Has anyone taken one apart to clean? There's a small brass screw on the underside of it but I can't remove it.

Thanks

Merz64cb77 · Post by **Merz64cb77** » Thu Jan 17, 2019 8:51 pm

Hi Tim, I think G-man has. I had some issues with my speedo and erratic needle movements but that’s not your issue. Hopefully someone else will offer a resolution.

Lm, recommended lubrication in my case which worked very well!

Thanks

rrietman · Post by **rrietman** » Thu Jan 17, 2019 11:16 pm

I have never gotten that tiny brass screw to thread out. It's a problem detail when refinishing. drill and heat will get the drive out, but then when you put it back together, It's hard to make it look right. soaking , scrubbing, and air will get the grit out (maybe the best solution)
Good luck
Randy

G-Man · Post by **G-Man** » Fri Jan 18, 2019 3:29 am

Those little screws are generally made of brass and, as usual, an oddball size. I took a couple of drives apart and the screws came out of one OK but I had to drill the others out.

I re-threaded the holes for an ISO size and used stainless-steel grubscrews.

To get teh brass screws out you need a reall good fitting screwdriver to avoid breaking them.

G

Tim Allman wrote:The speedometer gear assembly on my CB77 is a bit 'crunchy' when I turn it by hand suggesting that there is some grit in it. Has anyone taken one apart to clean? There's a small brass screw on the underside of it but I can't remove it.

Thanks

Tim Allman · Post by **Tim Allman** » Fri Jan 18, 2019 10:01 am

Thanks very much. I have a new helical gear in my parts box so I figured the assembly could be, well, disassembled.

Is the 6mm screw there to allow it to be greased?

LOUD MOUSE · Post by **LOUD MOUSE** » Sun Jan 20, 2019 6:40 pm

Sure is. .............lm

Tim Allman wrote:Thanks very much. I have a new helical gear in my parts box so I figured the assembly could be, well, disassembled.

Is the 6mm screw there to allow it to be greased?

rrietman · Post by **rrietman** » Sun Jan 20, 2019 11:08 pm

But--- go easy, you can blow grease past the seal very easily and then where is it? on the brake shoes. just lube on assembly. clean and repeat now and then.
Good luck
Randy

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Disassemble speedometer gear assembly

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