Speedo working backward ???

Got a spanner in the works? Post your motorcycle problems here.
OnHellas
Posts: 2613
Joined: Sat Oct 18, 2014 2:12 pm
Location: By the sea, Kent, UK
Has thanked: 572 times
Been thanked: 894 times

Speedo working backward ???

Post by OnHellas »

Help!

During my Triumph Legend TT Bobber build we fitted a lovely small speedo.
It's only about 1.9" in diameter.
However, it runs backwards, and the miles went from zero to 99,999.9 etc.

Has anybody have any ideas?
And no, I can't ride it in reverse!

Can speedos be dismantled and the direction reversed inside, or do Triumph speedo cables spin the other way (oh er misses!).

Help appreciated, witty comments welcome.......

image_2014-12-07.jpg
image_2014-12-07.jpg (56.05 KiB) Viewed 1302 times
sprintster
Posts: 2866
Joined: Tue Aug 06, 2013 4:49 pm
Has thanked: 105 times
Been thanked: 71 times

Re: Speedo working backward ???

Post by sprintster »

Maybe you've put the wheel on the wrong way round! ;)
User avatar
Mickdb1
Posts: 644
Joined: Sun Aug 07, 2011 5:57 pm
Location: Derbyshire
Has thanked: 16 times
Been thanked: 86 times

Re: Speedo working backward ???

Post by Mickdb1 »

It may be a daft idea - but I am the first maybe to say - turn your wheel tutherway around and swap fork legs so yer disc is on other side
I may need to get me coat
You dont pack up biking when you grow old

You grow old when you pack up biking
OnHellas
Posts: 2613
Joined: Sat Oct 18, 2014 2:12 pm
Location: By the sea, Kent, UK
Has thanked: 572 times
Been thanked: 894 times

Re: Speedo working backward ???

Post by OnHellas »

sprintster wrote:Maybe you've put the wheel on the wrong way round! ;)
As the single brake caliber still sits over the single brake disc, I think I got it about right. B)
Next idea............
herman
Posts: 5359
Joined: Mon Jul 19, 2010 7:51 pm
Has thanked: 878 times
Been thanked: 632 times

Re: Speedo working backward ???

Post by herman »

The original may of had a bevel gear or at least an extra gear. Probably need to get a cable made up using your old one? so yes it spins backwards.
The secret of a long life is knowing when its time to go.
OnHellas
Posts: 2613
Joined: Sat Oct 18, 2014 2:12 pm
Location: By the sea, Kent, UK
Has thanked: 572 times
Been thanked: 894 times

Re: Speedo working backward ???

Post by OnHellas »

Mickdb1 wrote:It may be a daft idea - but I am the first maybe to say - turn your wheel tutherway around and swap fork legs so yer disc is on other side
I may need to get me coat
Well either you can get your coat or I'll get mine.
Good idea, but surely the brake caliper would be outside in? :S
OnHellas
Posts: 2613
Joined: Sat Oct 18, 2014 2:12 pm
Location: By the sea, Kent, UK
Has thanked: 572 times
Been thanked: 894 times

Re: Speedo working backward ???

Post by OnHellas »

herman wrote:The original may of had a bevel gear or at least an extra gear. Probably need to get a cable made up using your old one? so yes it spins backwards.
Thanks for that, although I'm struggling to keep up.
I'm using a genuine Triumph speedo cable for the correct bike.
How do I change its direction?
Is the speedo just not compatible?

Sorry if I'm being thick.
User avatar
bowber
Posts: 2240
Joined: Tue Oct 29, 2013 9:48 pm
Has thanked: 34 times
Been thanked: 179 times

Re: Speedo working backward ???

Post by bowber »

Weird!
When you spin the wheel does the cable spin clockwise? It should or the original speedo had another set of gears to reverse the direction internally.
Does the new speedo work anticlockwise?

Also most speedo's have a mechanism to stop reverse winding of the mileage for obvious reasons.

Steve
User avatar
zimtim
Posts: 2605
Joined: Sun Nov 14, 2010 10:01 am
Has thanked: 623 times
Been thanked: 548 times

Re: Speedo working backward ???

Post by zimtim »

Or maybe you've built a time machine :whistle:
OnHellas
Posts: 2613
Joined: Sat Oct 18, 2014 2:12 pm
Location: By the sea, Kent, UK
Has thanked: 572 times
Been thanked: 894 times

Re: Speedo working backward ???

Post by OnHellas »

zimtim wrote:Or maybe you've built a time machine :whistle:
I think that I could have bought one for the money that I've spent on the build! :ohmy: :ohmy:
Post Reply

Return to “TECHNICAL”