Looking into New Speedometer - Honda Rebel Forum
 
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post #1 of 7 Old 12-28-2019, 12:33 PM Thread Starter
 
Join Date: Dec 2019
Posts: 25
Looking into New Speedometer

Dear Forum,

I am thinking of swapping my stock speedo with a new minimal small one. I am thinking a speedo like this.

My questions are about the cable nut and whether this will fit on my honda rebel cmx 250? Do I have to change the whole cable? what is the nut size of the stock cable?

Any info or pointers to aftermarket speedos with a minimal feel that can work with the bike will be much appreciated!
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post #2 of 7 Old 12-30-2019, 03:57 AM
 
Join Date: Oct 2019
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Don't see why not...just from looking. Not sure on the threads but they should be standard threads.

2009 Kawasaki Vulcan 900
2005 Honda Rebel 250
2018 Kymco Spade 150
JHCO50 is offline  
post #3 of 7 Old 01-05-2020, 06:46 PM
 
Join Date: Jun 2012
Location: Boston
Posts: 76
I'm considering one of these for my Nighthawk project bike, yes it's in KPH but I think with a cheat sheet and a few miles that I can adjust. For that price I'd think it'd be worth looking into.

https://www.ebay.com/itm/Universal-M....c100009.m1982

92 CB250 Nighthawk - partsbike
93 CB250 Nighthawk - partsbike
92 CB250 Nighthawk - project
78 CB400T - partsbike
81 CM400C - Project, on the road
73 CB750K3 - Long term project
Alan F. is offline  
 
post #4 of 7 Old 01-05-2020, 06:49 PM
 
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Posts: 55
This guy has posted before about the exact same thing, generic speedos will not fit, the wiring is completely different to the rebel

1997 Honda CA125 Rebel
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post #5 of 7 Old 01-05-2020, 06:52 PM
 
Join Date: Jun 2012
Location: Boston
Posts: 76
And with a wiring diagram in hand they cannot be adapted to work the same as every other motorcycle?
Alan F. is offline  
post #6 of 7 Old 01-06-2020, 12:03 AM
 
Join Date: Jun 2019
Location: Colorado
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How do generic mechanical speedos work? It just senses the speed of the wheel so road speed will depend on the wheel size - is there an industry-standard speedo cable factor that the gearbox on the wheel adapts to?


As for wiring, you'll have to get creative with the turn signal connection (if you don't know what a diode is you probably won't figure it out on your own ) but the rest should be a piece of cake with a diagram

'09 Rebel 250
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post #7 of 7 Old 01-07-2020, 05:10 PM
 
Join Date: Jun 2012
Location: Boston
Posts: 76
Quote:
Originally Posted by alexisv View Post
How do generic mechanical speedos work?
The speedometer drive gearbox at the wheel translates one wheel rotation to X amount of rotations of the speedometer cable.
There are a few different ratios in use but most Hondas use something like 2240=60MPH there is an equal metric ratio that is something like 1440=60KPH but it works out to be the same.

92 CB250 Nighthawk - partsbike
93 CB250 Nighthawk - partsbike
92 CB250 Nighthawk - project
78 CB400T - partsbike
81 CM400C - Project, on the road
73 CB750K3 - Long term project
Alan F. is offline  
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