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D3 rear wheel speedo drive help?
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Dave1
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April 30, 2019 - 3:10 pm
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Hi guys, 

I have a weird problem. I took my rear wheel out of my D3 Bantam yesterday for some routine maintenance.

When I put the wheel back together, and did the speedo drive nut up tight, it tightens the whole rear end. So that the rear wheel spindle doesn't rotate, and the speedo dive rotates with the wheel. 

If I slacken off the speedo drive lock nut, then it rotates with the wheel. 

I'll post a photo. 

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cocorico
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April 30, 2019 - 3:19 pm
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Take your pick from ** Please log in to view ** previous questions and answers.

The Bantam Club Forum - all the answers are in there. If not, Google may.

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Dave1
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April 30, 2019 - 3:26 pm
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Here's the photo. I'm missing the felt washer? Anybody else notice anything?

speedo.jpg

Edit. Hi Rooster, yes I did a search yesterday on here. What I read was confusing with people posting opposites. I will have a look at what you've posted.

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Dave1
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April 30, 2019 - 4:30 pm
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cocorico said
Take your pick from ** Please log in to view ** previous questions and answers.  

Hi cocorico, I've searched. The only thing I think I'm missing is the felt washer, and maybe a washer on the inside of the speedo gearbox itself. Can anyone please confirm if there is a washer that goes on the inside of the gearbox it's self?

I did try a washer on the inside of the gearbox, but I found it made no difference?

I'm at a loss guys? Help please. 

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mike p5xbx
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April 30, 2019 - 5:37 pm
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is this for a swing-arm or Plunger i think the spacers differ

D? - D10- D14 Bantams 350 AJS -500 Triumph http://bsanotru.....lfire.com/

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Dave1
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April 30, 2019 - 5:55 pm
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Hello Mike, it's for a plunger rear end. 

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Cornish Rooster
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April 30, 2019 - 5:58 pm
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Any success ?

BSA Bantam D1 "150" in use regularly often as general purpose transport, quite a few other bikes as well. Cornwall Area Rep. 

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Cornish Rooster
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April 30, 2019 - 6:00 pm
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Like I said in the PM I sent you, what you need is a washers (or washers) to get the drive the correct distance from the hub, i.e. no spacers (washers) and you will clamp the drive to the hub.  

BSA Bantam D1 "150" in use regularly often as general purpose transport, quite a few other bikes as well. Cornwall Area Rep. 

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Cornish Rooster
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April 30, 2019 - 6:01 pm
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Put the washers behind the speedo drive by the way just to make that clear, 

BSA Bantam D1 "150" in use regularly often as general purpose transport, quite a few other bikes as well. Cornwall Area Rep. 

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Dave1
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April 30, 2019 - 6:33 pm
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Hi Cornish Rooster. I haven't received a pm? Thanks for the replies here. I'm at work now. I will let you know how I get on.

I've already tried shimming the speedo drive by putting washers on the inside of the speedo gearbox, which rest up against the spacer. 

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Cornish Rooster
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April 30, 2019 - 6:42 pm
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Not sure why the PM's didn't come through ? Yes what you need is sufficient washers behind the speedo drive to keep it off the wheel hub and the drive dogs on the speedo drive should obviously line up with the slots on the wheel hub. Then the locking nut fits outside of the speedo drive, this "locks" the speedo drive in place and stops it rotating, this outer nut is the thin one flat on both sides and should ideally be nipped up once the wheel is fitted, and again ideally you will need a thin spanner. Maybe you didn't have enough washers on the inside of the drive if the wheel was still locking up once everything was tightened ???

BSA Bantam D1 "150" in use regularly often as general purpose transport, quite a few other bikes as well. Cornwall Area Rep. 

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Dave1
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May 7, 2019 - 7:07 pm
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Hi Rooster, I managed to sort out the speedo drive today. In the end I had to go through all my washers to find a combination that works. Unfortunately most of my washers are from bulk washer packs. So are the same thickness. Really had to hunt for a thin washer to combine with my 1/8th inch washer.

Good result all. 

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