View Full Version : Interchangeable speedo's?
Chrissy_Tgirl
11-01-2007, 08:34 PM
deleted due to lack of interest
trikerdrew
12-01-2007, 07:03 AM
part nos could help....
okay this is probably posted else where but if not then here goes
You canb connect directly to honda service centres computer and use their electronic parts finder, just like at the dealers and find your part nos.
servicehonda.com lets you connect up to their server with a remote desktop session and view their parts fiche's for every single honda motorcycle in existence.
1 - start->programs->accessories->communications->remote desktop
2 - type in 69.213.66.54
3 - Then hit connect, once the session starts up, hit ok on the error message if it comes up.
4 - Then when the program opens, click the green book icon on the left side.. pretty simple.
all the numbers you could ever imagine, okay
Blatantly swiped from the most excellant guys at www.chopperbuilder.co.uk
Another top bloke is www.davidsilverspares.co.uk worth a word in his ear.
Something that will work is pushbike speedo (LCD one) tidy and cute as well
OK.I don't know but there are loads that will :D
good luck,
Drew
Blackjack
12-01-2007, 11:32 AM
That aside.
Yes you're right, in fact pretty much any mechanical jap speedo will work.
peter-dog
12-01-2007, 07:59 PM
That aside.
Yes you're right, in fact pretty much any mechanical jap speedo will work.
just be careful to check the ratio's
Blackjack
12-01-2007, 08:28 PM
just be careful to check the ratio's
Speedo.
Not a tacho.
While you get different ratios on mechanical tachos, Jap speedos are 2:1.
Harley ones are different.
http://www.jwmotorcycles.com/customparts/gauges.html
peter-dog
13-01-2007, 12:38 AM
i stand corrected :rolleyes:
The speedo has to come from a bike with the same wheel diameter.
Dougie
13-01-2007, 09:38 AM
You sure?Thought it was the speedo drive that made the difference.......
Blackjack
13-01-2007, 05:08 PM
It is Dougie. That's why all the speedos are 2:1.....
However, sadly,the fact that a speedo off of a bike built on a Tuesday, will not work on a bike built on any other day, or on one built on a Tuesday if its a different colour is one that I just completely made up.
Basically what it all boils down too is that yes the bloody XR600 speedo ought to work on the 250 RS cable and drive and still be about as accurate as it ever was.
I'm sure I put a speedo off a 19" wheel on a 17" and it was about 20% out, so I assumed (should never do that really) that the wheel size affected it as well.
But thinking about it, bloody obvious it wont affect it. DOH!!!
wheel size wont matter as the drive is from the spindle.
Chrissy_Tgirl
14-01-2007, 10:49 PM
deleted due to lack of interest
trikerdrew
16-01-2007, 08:43 PM
Surely,if speedo drive is ratio from spindle it needs must have a direct correlation to rim/tyre profile.
Have I missed something??
Hope the honda parts thing works out for you :)
Cheers
Drew
Blackjack
16-01-2007, 10:51 PM
Surely,if speedo drive is ratio from spindle it needs must have a direct correlation to rim/tyre profile.
Have I missed something??
Hope the honda parts thing works out for you :)
Cheers
Drew
The DRIVES have different ratios, speedos don't.
INDIANDRAG
20-01-2007, 10:18 AM
Surely,if speedo drive is ratio from spindle it needs must have a direct correlation to rim/tyre profile.
Have I missed something??
Hope the honda parts thing works out for you :)
Cheers
Drew
No matter what the size of wheel/tyre,it will still rotate the same number of times per miles per hour. :)
trikerider
22-01-2007, 05:24 PM
To travel a mile, a smaller tyre/wheel will have to revolve more times.
So therefore, the spindle will revolve more times.
So therefore, tyre diameters and circumferences DO make a difference.
Regardless of ratios or whatever! :confused:
no the spindle is a fixed size no matter what the Dia of the wheel is, otherwise youd need a new speedo every time you change wheel or tyre
Chrissy_Tgirl
22-01-2007, 08:36 PM
deleted due to lack of interest
Blackjack
22-01-2007, 08:49 PM
To travel a mile, a smaller tyre/wheel will have to revolve more times.
So therefore, the spindle will revolve more times.
So therefore, tyre diameters and circumferences DO make a difference.
Regardless of ratios or whatever! :confused:
If a spindle revloves, it isn't a spindle, it's an axle.
Yes, different size wheels rotate a different number of times when travelling a fixed distance.
To compensate for this, the speedo drive ratio is chosen so that the cable turns a fixed number of times for a given distance travelled.
So......
If the only thing you change is the speedo, then it's going to be retain a similar level of accuracy to the departed unit.
If you change an 19" wheel for a 21" wheel and keep everything else speedo related the same, the the speedo will read slow. To correct this you need to use a speedo drive from a wheel with the same rolling diameter as the new one, or at least as close as you can find, so probably one off of a trail bike fitted with a 21" wheel is going to work. Equally if you use a speedo drive from, say,a 19" wheel with a 17" wheel, it will make the speedo read fast.
Chrissy_Tgirl
22-01-2007, 08:56 PM
deleted due to lack of interest
INDIANDRAG
23-01-2007, 07:17 AM
If a spindle revloves, it isn't a spindle, it's an axle.
Yes, different size wheels rotate a different number of times when travelling a fixed distance.
To compensate for this, the speedo drive ratio is chosen so that the cable turns a fixed number of times for a given distance travelled.
So......
If the only thing you change is the speedo, then it's going to be retain a similar level of accuracy to the departed unit.
If you change an 19" wheel for a 21" wheel and keep everything else speedo related the same, the the speedo will read slow. To correct this you need to use a speedo drive from a wheel with the same rolling diameter as the new one, or at least as close as you can find, so probably one off of a trail bike fitted with a 21" wheel is going to work. Equally if you use a speedo drive from, say,a 19" wheel with a 17" wheel, it will make the speedo read fast.
EXACTLY what I was getting at.
Blackjack
23-01-2007, 01:22 PM
The whole issue can't be that much of a problem anyway... otherwise no bugger would ever change their tyre sizes, let alone wheel sizes... :)
I think the discussion has gotten a bit away from your original question.
The answer to which was, yeah you can use the other speedo.
Otherwise, you're right, like most things is not much of an issue as long as you have some grasp of what you're doing. :eek:
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