problem with speedometer not working

[Chouiyekh]

Hello, I own a Honda CBX250 TWISTER 2008, my problem is with speedometer not working i don't know where the problem is and from where to start checking and trying to find the problem where, please help me, is the problem coming from speedo cable or from speed sensor .. ect i took my bike to some technicians but the problem is with the parts are not available to test, so what need now, is to help me somehow to test my own parts related to speedometer if it work or not and which part is the problem coming from then i will buy the part from the internet.
thanks

[jaffa90]

I would remove the cable from the speedo clock and tie it nearby to see if the inner cable rotates when riding.
If not then remove the cable from the front wheel and try to rotate the inner cable by hand while watching the other end at the clock.

[Chouiyekh]

[bikenut]

You know of cmsnl ??

Find your bike on there for the exploded views which can only help.

Yes disconnect the speedo cable from the speedo head, the clock, and then rotate the front wheel, does the speedo inner cable turn ?

Insert a square section "probe" into the speedo head to act as a dummy cable and rotate in the direct of the speedo needle, does the speedo needle move ?

Has this problem started after removing/refitting the front wheel ???

If so then 10 to one its a bent "dog plate".............any takers...... :D
____________________
nuts about bikes

[Chouiyekh]

I tried what you said and the speedo inner cable turn, when the front wheel rotate, so what next i can do ?

[Chouiyekh]

I don't know when the problem start, because i just bought the bike used condition not new, i bought it with the problem exist, i don't know how it's happened

I don't know of cmsnl what is it ?

[Islander]

It may be that the cable has worked loose at the speedo - I've seen that happen a few times. Try putting it all back together properly and see if it works.

[Chouiyekh]

[jaffa90]

Hold on, the cable and inner cable is for the speedo clock (mph or kph).
The sensor wire is for the tacho clock ( engine revs per minute).
Which are you talking about????????????

[Chouiyekh]

[jaffa90]

New on me and cannot help any more,
https://www.google.com/search?q=Honda+CBX250+TWISTER+2008+speedo+cable&tbm=isch&tbo=u&source=univ&sa=X&ved=2ahUKEwjMwdSBubHdAhWJKVAKHc4pDdQQsAR6BAgGEAE&biw=1440&bih=763#imgrc=EcjdCzoe6SQe-M:

[Chouiyekh]

[cresad]

Hi

I've had a look at the pics/diagrams on that link and it looks like there is a cable that connects to a speed sensor then to the clocks. If you've checked the cable turns when the front wheel rotates but when connected to the sensor doesn't move speedo needle then it does look like you might have a problem with either the sensor or the clocks.
You have 2 options , change the sensor and hope that sorts it or get a second set of clocks and test it by attaching them to you system.

Don't know of a way of testing the output from the sensor unfortunately.

Adam

[Islander]

This site shows you how to test a speed sensor - it's quite straightforward.

https://www.speedwaymotors.com/the-toolbox/testing-2-and-3-wire-speed-sensors/28754

[Chouiyekh]

[Chouiyekh]

[Islander]