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Broken Speedometer Needle Shaft/Post

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stepper
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Joined: Fri Apr 22, 2016 11:51 pm
Location: Virginia Beach

Broken Speedometer Needle Shaft/Post

Post by stepper » Sun Jul 03, 2016 10:33 am

As I had mentioned in a previous post (and in the classifieds), I had broken my speedometer needle shaft while trying to pry it off for disassembly.

I have posted in the classifieds and am scouring Ebay and Craigslist for a replacement but I was wondering if anybody knows if there is any other bike (possibly the baby dream?) that I can salvage a replacement shaft from?

Thanks for any replies.
JV

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G-Man
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Post by G-Man » Tue Jul 12, 2016 1:04 am

There are a lot of basic similarities between speedos / tachos of all of the 'family' of 305 bikes. It may be possible to transplant (if you are very careful) the shaft out of anything you can find.

This is a CL77 part....

Image


G
'60 C77 '60 C72 '62 C72 Dream '63 CL72
'61 CB72 '64 CB77 '65 CB160
'66 Matchless 350 '67 CL77
'67 S90 '77 CB400F

stepper
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Posts: 89
Joined: Fri Apr 22, 2016 11:51 pm
Location: Virginia Beach

Post by stepper » Tue Jul 12, 2016 9:21 am

Thanks G,
The speedo you show actually has a different set of worm and drive gears and the shaftlooks to be shorter than mine.

I ended up buying a broken unit off of Ebay for parts.

The unit I bought was an identical looking Nippon Seiki unit that used philips head screws on the face and back instead of the flat head screws on mine. I planned on scavenging just the needle and shaft but I found that there doesn't seem to be an easy way of removing the shaft from the inner cup. So I decided to just fit the entire cup and shaft assembly onto my unit. But I then found that the two units used different cup sizes and a slightly different frame design as well!

In the end I pieced together a good mix of both units using the broken speedo's frame, cups, shaft and needle along with my old speedometers worm and drive gears, digit assembly, face and housing. I buttoned it all up with silicon glue.

I am quite proud to say that the unit now looks and functions great!

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G-Man
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Location: Derby, UK
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Post by G-Man » Tue Jul 12, 2016 11:43 am

Stepper

That's the way to do it. There's always a way out of these problems which just costs a bit of time and ingenuity.

Looks like you have a result and some useful education to go with it.

G
'60 C77 '60 C72 '62 C72 Dream '63 CL72
'61 CB72 '64 CB77 '65 CB160
'66 Matchless 350 '67 CL77
'67 S90 '77 CB400F

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