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Re: Speedo gearbox question

Posted: Mon Oct 15, 2018 1:35 am
by nevhunter
The speed reading and the ODOmeter reading are in the correct relationship. Is this a front wheel drive set up? There's less to be out with the front wheel driven unit. Nev

Re: Speedo gearbox question

Posted: Mon Oct 15, 2018 7:08 am
by simon.holyfield
nevhunter wrote:The speed reading and the ODOmeter reading are in the correct relationship. Is this a front wheel drive set up? There's less to be out with the front wheel driven unit. Nev


Yes, it's my W/NG Nev. I'll need to be counting turns and teeth next time I have the front wheel off.

Re: Speedo gearbox question

Posted: Mon Oct 15, 2018 11:56 am
by nevhunter
Do you know the correct gears? I've been working on a couple lately and can tell you details I would be surprised if anything but he correct ones will fit the threaded hub and mesh correctly . I will be giving mine more love than previously I neglected the open ones and wrecked both. I'll be greasing them about every 2,000 miles at the most from now on. Nev

Re: Speedo gearbox question

Posted: Mon Oct 15, 2018 12:50 pm
by simon.holyfield
I'd appreciate you summarising the gear teeth and the gearbox ratio as you see it Nev. I know that I have 14 teeth on the small gear (I have a picture of it) but anything else will need it to come apart.

The W/NG is my only running bike while I search for the misfire on my SQ4.

Re: Speedo gearbox question

Posted: Mon Oct 15, 2018 5:50 pm
by alan.moore
simon.holyfield wrote:I'd appreciate you summarising the gear teeth and the gearbox ratio as you see it Nev. I know that I have 14 teeth on the small gear (I have a picture of it) but anything else will need it to come apart.

The W/NG is my only running bike while I search for the misfire on my SQ4.


Simon,
See my earlier post in page two of this topic. Looks like you may also have a gearbox with an 8 tooth/14 tooth gear set .
Cheers
Alan

Re: Speedo gearbox question

Posted: Tue Oct 16, 2018 5:20 am
by nevhunter
I have just checked 3 different W/NG front wheels and the 14 /43 external gears and the internal ratio of 8: 12 as per Alan's post is confirmed. so the 12 % error may be expected, if the speedo itself is the same. Nev

Re: Speedo gearbox question

Posted: Mon Nov 26, 2018 7:17 pm
by simon.holyfield
Alan,

Did you ever get this resolved? I'm thinking we are both looking for 8:12 speedo drive gears?

Re: Speedo gearbox question

Posted: Mon Nov 26, 2018 7:41 pm
by alan.moore
Yup all sorted (I hope) I bought one from Reins on the forum. I can confirm the one he sent me has a 8:12 ratio. Compared with what is being asked for these drives on Ebay his was a reasonable price. I believe he had two so maybe he has another to sell. Will PM you

Cheers
Alan

Re: Speedo gearbox question

Posted: Thu Feb 27, 2020 7:44 pm
by EricBorg
Reviving an old topic to help me understand what I have (rather what I have missing).

So I’ve got myself a nice WD Smiths speedo for the WNG, had it serviced by Russell and now I’m itching to get it on the bike and see it working as it should.
My problem now lies with the speedo drive gearbox,
I’ve got the 43T on the drum and was missing the 14T drive sprocket which I now have too.
Now I notice I’m missing the shaft (???) that the 14T sprocket rides on. Don’t know what it’s called as it looks part of the gearbox on my parts list book.

Can anyone tell me what this missing part is called please so I know what to look for.
Better still, can anyone suggest where I might find one??

Thanks

Re: Speedo gearbox question

Posted: Thu Feb 27, 2020 10:38 pm
by nevhunter
It has a skew gear on the end of the shaft. I've never seen these parts separately. There's a place in Melbourne who probably make them and may be capable /willing to do the whole drive in bronze. The original case is muckmetal. I'm pretty sure the add was in Classic bike or some Australian magazine. You can surf the net as well as I can . The AU dollar is low and getting lower so that's in your favour if you want anything from HERE. Let me know if you have any success and I may be able to "case the joint" for you. Nev