CBR125 speedo all over the place

dave_bole · Borekit Bruiser Joined: 03 Apr 2012 Karma :

I finally got the 2004 CBR125 working but have one finally small problem...

When accelerating, the speedo jumps about all over the place until i let off the throttle and it levels out to the correct speed.

Any ideas on a first port of call?

Moxey · World Chat Champion Joined: 11 May 2011 Karma :

2004 CBR has analogue speedo with cable doesn't it?

Check the cable isn't snagging and is freely moving first, if all seems ok from that end I would suspect the needle bearing may have gone up at the clock, watchmakers of some sort may be able to repair that for you (Timpsons or similar).
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Fairies attack · Banned Joined: 21 May 2011 Karma :

Had a problem like this before.

Can't remember if it was Speedo or Tacho, but it turned out to be the battery at fault.

Give that a check to see if it is charging properly.
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P.addy · Red Rocket Joined: 14 Feb 2008 Karma :

The speedo mech on the front wheel hasn't been put on properly. Thumbs Up

CaNsA · Super Spammer Joined: 02 Jan 2008 Karma :

i had this on my 1st zxr400, i was doing 30mph then 140mph then 10mph, then 90mph all in the space of 3 seconds...... turned out the speedo cable was fuxord.

dave_bole · Borekit Bruiser Joined: 03 Apr 2012 Karma :

i have ordered a new speedo cable.

Already ruled out the battery as i have just bought a new one.

Ill let you know how it goes on the weekend when i get a chance to have a look at it

P.addy · Red Rocket Joined: 14 Feb 2008 Karma :

CarlosCBR · World Chat Champion Joined: 12 Mar 2010 Karma :

Definitely the speedo cable. They dry out inside the sheath and eventually snap, common fault, make sure you lube the new one before you install it.

Can be a pain in the arse getting the cable out of the drive so be gentle or you risk snapping the bit off the back of the speedo drive.
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