Re: [St] Speedo pickup on RS/ST

["Chris Harwood" <Chris@xxxxxxxxxxxxxxxxxx>]

It could well be and it's easier to check than wiring intermittents. 
The other thing is that it may be damaging the magnet - although a
replacement might not cost much, the bits could chew up the whole sensor
from inside.
 
Chris Harwood
00 RS


>>> david_f@xxxxxxxxxxx 27/09/2008 06:42:30 >>>
I have a 2002 RS that randomly the spedo does not work.
Sometimes I can go a few miles, stop/start the bike and it is fine.
Everything seems to come on with no problems, just appears to possibly
be
the speed sensor.
Think this is the same thing?



-----Original Message-----
From: st-bounces@xxxxxxxxxxxxxxxxxxxx 
[mailto:st-bounces@xxxxxxxxxxxxxxxxxxxx] On Behalf Of Chris Harwood
Sent: Thursday, September 25, 2008 8:13 AM
To: ST@xxxxxxxxxxxxxx 
Subject: [St] Speedo pickup on RS/ST

My speedo died on the way to work yesterday and I happened to see it
go.
Quite funny really.  It read 0 from about 0 - 10mph then 1 from
10-40ish
and I managed to get it up to 11 on the motorway!  Hopefully you can't
be
prosecuted on that evidence.

I was pretty sure what the problem was (front wheel sensor) so pulled
it off
this lunchtime.  It now works again but the cause might be of some
interest
to listers.

A couple of years ago I had the front tyre replaced and on my way
home,
noticed the speedo was not working so returned to get the job done
properly(?).

The drive for the spinning magnet is via a tabbed washer and it needs
to be
'mated' with the magnet before fitting the wheel to the forks.  If you
don't
bother, and tighten the wheel anyway, the tabs get bent away from the
magnet
and if you don't straighten them they will never mate correctly and
will
chip away at the magnet every time the bike goes forwards or
backwards.
This gets worse if the grease on the magnet gets clogged with dust and
dirt,
raising the resistance to turning.

So, if you have the front wheel off, I suggest checking that the tabs
are
not deformed - i.e. the face of the washer is flat and the tabs stand
out at
90 degrees to it.  When fitting to the wheel, try to line up the slots
with
the tabs by eye then apply light pressure while turning the wheel until
you
feel the sensor drop into engagement.

HTH

Chris Harwood
00 RS
_______________________________________________
Triumph Sprint ST/RS mailing list
Send list posts to ST@xxxxxxxxxxxxxx 
Change your list options at www.Triumphnet.com 

_______________________________________________
Triumph Sprint ST/RS mailing list
Send list posts to ST@xxxxxxxxxxxxxx 
Change your list options at www.Triumphnet.com 

_______________________________________________
Triumph Sprint ST/RS mailing list
Send list posts to ST@xxxxxxxxxxxxxx
Change your list options at www.Triumphnet.com