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#687177 - 03/07/17 10:17 pm Clockwise or counterclockwise speedo  
Joined: Oct 2014
Posts: 48
thetylerguy Offline
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thetylerguy  Offline
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Joined: Oct 2014
Posts: 48
Texas, USA
I have a '67 Lightning with a Smiths SSM 5007/02A |600 speedo. When I disconnect the speedo cable from the rear wheel drive and spin it with a drill CLOCKWISE, the speedo does not work. When I reverse the drill and spin the cable COUNTERCLOCKWISE, the speedo works. So I hook it back up and make sure itstightened down, and go ride. NOTHING!

Am I doing something wrong?

The bike just got delivered, and for what I paid for it I expected a lot more than an inop speedo. Is it possible that the speedoomoter gearbox is the wrong one?

Any help would be appreciated.


1969 Thunderbolt
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#687178 - 03/07/17 10:28 pm Re: Clockwise or counterclockwise speedo [Re: thetylerguy]  
Joined: Oct 2008
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LarryLebel Offline
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LarryLebel  Offline
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Canada
Does the speedometer end of the cable turn when you spin the rear wheel? The cables do break. BTW you could have the wrong speedometer. The original speedometer would have 1000 after the serial number instead of 1600. This number is the turns per mile specification of the speedometer. The 1000 number correlates with a 15/12 drive gear which is normal for an A65. The 1600 correlates which a 2:1 drive gear that is original on BSA unit singles. Its not very often a unit single speedometer ends up on a twin, its usually the other way around. To determine what drive gear you have spin the wheel a few times and count the turns of the end of the cable.

Last edited by LarryLebel; 03/07/17 10:39 pm.
#687186 - 03/07/17 11:33 pm Re: Clockwise or counterclockwise speedo [Re: thetylerguy]  
Joined: Oct 2014
Posts: 48
thetylerguy Offline
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thetylerguy  Offline
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Joined: Oct 2014
Posts: 48
Texas, USA
I put a toothpick in the speedometer gearbox and spun the rear wheel and determined that the output from the gearbox does spin the cable counterclockwise. I then put a toothpic in the speedo head and when turned counterclockwise, the speedo works.

Both ends of the cable appear to be mostly square and not rounded off.

Baffling!

Correct me if I'm wrong, but it has to be either the cable end into the gearbox is either too short or is in fact rounded off .... OR .... the speedo gearbox is defective!?


1969 Thunderbolt
#687187 - 03/07/17 11:35 pm Re: Clockwise or counterclockwise speedo [Re: thetylerguy]  
Joined: Oct 2014
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thetylerguy Offline
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thetylerguy  Offline
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Texas, USA
I'll give that a try, Larry.


1969 Thunderbolt
#687189 - 03/07/17 11:44 pm Re: Clockwise or counterclockwise speedo [Re: thetylerguy]  
Joined: Oct 2014
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thetylerguy Offline
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thetylerguy  Offline
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Joined: Oct 2014
Posts: 48
Texas, USA
Spun the cable, Larry. The cable spins fine.

Now that I think about it, I'm going to have to put it all back together and ride it some distance and see if the odometer IS working. I thought it was, but I may be mistaken. If it works, but the speedo part doesn't ... at least that'll narrow it down for when I call Nisonger tomorrow.


1969 Thunderbolt
#687198 - 03/08/17 1:24 am Re: Clockwise or counterclockwise speedo [Re: thetylerguy]  
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LarryLebel Offline
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LarryLebel  Offline
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Posts: 1,654
Canada
The collars on either end need to be threaded on all the way, so the cable is not loose at all. I find the threaded collars are easy to cross thread which gives the false impression they are tight. Also, if the cable is too short you won't be able tighten the collars.

Last edited by LarryLebel; 03/08/17 1:26 am.
#687380 - 03/09/17 5:53 pm Re: Clockwise or counterclockwise speedo [Re: LarryLebel]  
Joined: Oct 2014
Posts: 48
thetylerguy Offline
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thetylerguy  Offline
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Joined: Oct 2014
Posts: 48
Texas, USA
I'm getting a new cable from the BonnevilleShop.com. I think the cable that's in there is not actually long enough, as I put it all back together and the odometer does not work either, but the speedometer rear axle gearbox is good and the instrument is good.

We'll see!

Thanks,

Roger


1969 Thunderbolt

Moderated by  Allan Gill, Jon W. Whitley 


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