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PostPosted: Sun Oct 29, 2017 2:38 pm 
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Joined: Tue Jun 23, 2009 12:55 pm
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Current ride: S1W,XB9R,690SM,TTR
Location: Preston, Lancs
Thought I'd take one last trip out on the S1 before SORNing it. In a short run out of no more than 20 miles it went from missing a little to being almost unrideable.

Symptoms:
    - Tacho was unstable (and getting worse). Initially reading up to 1000rpm higher than a expected but later sometimes 3000rpm
    - Though initially it would idle OK, heading home it needed to be held above idle to remain running
    - With the ignition on and but the bike not running the tacho needle would also jump to a value
    - Moving the bars or moving the loom near RHS of the headstock sometimes made the tacho needle jump

i had taken the tank off for some fettling of the mounts just prior to going out and the bike was running fine last time out. The tank vent line was clear and disconnecting it while running did not improve the engine behaviour

So I figure there is something electrical in the loom. Anyone had this before on a tuber and know any weak points or known problems with these symptoms

Ta.


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PostPosted: Sun Oct 29, 2017 5:00 pm 
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Location: Glossop in't th'hills
I'll give you 50 quid for it Jez as spares or repair for mine..... :yup:


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PostPosted: Sun Oct 29, 2017 5:21 pm 
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Location: Glossop in't th'hills
I thought I'd get in there first as there are some charlatans out there who'd offer you well below it's market value. I hope you look upon this generous offer favourably being a fellow white lightning owner.........Dave :coat:


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PostPosted: Sun Oct 29, 2017 5:22 pm 
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proff. patpending
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Current ride: Victoria Sponge
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Loose connection on the coil?

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08 Specialized Langster


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PostPosted: Sun Oct 29, 2017 7:53 pm 
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Current ride: S1W,XB9R,690SM,TTR
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DaveH wrote:
I'll give you 50 quid for it Jez as spares or repair for mine..... :yup:
DaveH wrote:
I thought I'd get in there first as there are some charlatans out there who'd offer you well below it's market value. I hope you look upon this generous offer favourably being a fellow white lightning owner.........Dave :coat:

Think I'll do some fault finding first......but if you'd included a couple of bags of Pickled Onion Space Raiders I'd have been biting you hand off......

pash wrote:
Loose connection on the coil?

First thing I checked when I got home (to the spark plugs at least). I'll whip the tank off next weekend and have a nosey at the other side of the coil. Could this produce the dancing Tacho needle?

.....bloody hate electrics snags..... :evil:


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PostPosted: Sun Oct 29, 2017 8:19 pm 
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Current ride: 2004 Buell XB 12s
Location: Schoorl ,Netherlands
Could be the same,
viewtopic.php?f=8&t=21978

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PostPosted: Sun Oct 29, 2017 8:41 pm 
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proff. patpending
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That’s what I’m on about

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PostPosted: Mon Oct 30, 2017 7:09 am 
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Current ride: S1W,XB9R,690SM,TTR
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brother in buells wrote:
Could be the same,
viewtopic.php?f=8&t=21978


Thanks. Will have a look at the weekend


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PostPosted: Mon Oct 30, 2017 12:53 pm 
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Current ride: 98 S1W
Location: Perth, not the Scottish one
I got some new connectors, but still haven't fitted them, just used a ring connector and a nut, as suggested by Brother in Buells :P


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PostPosted: Mon Oct 30, 2017 1:15 pm 
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Current ride: S1W,XB9R,690SM,TTR
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Bonzo wrote:
I got some new connectors, but still haven't fitted them, just used a ring connector and a nut, as suggested by Brother in Buells :P


Was your tacho erratic prior to identifying this?


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PostPosted: Mon Oct 30, 2017 1:43 pm 
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Current ride: 98 S1W
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jeznewsome wrote:
Bonzo wrote:
I got some new connectors, but still haven't fitted them, just used a ring connector and a nut, as suggested by Brother in Buells :P


Was your tacho erratic prior to identifying this?


Yes


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PostPosted: Mon Oct 30, 2017 6:26 pm 
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Current ride: S1W,XB9R,690SM,TTR
Location: Preston, Lancs
I'll keep my fingers crossed that this is my problem too then :D. Thanks

Bearing in mind it was running ok before I faffed with the tank mounting rubber I wonder if I have disturbed the coil at the same time.


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PostPosted: Mon Oct 30, 2017 7:16 pm 
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proff. patpending
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I wonder too...

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PostPosted: Mon Oct 30, 2017 9:43 pm 
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Current ride: Buell X1 2001
Location: southampton
well there's a fair chance & it will be an easy fix hopefully :yup:

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PostPosted: Sat Nov 18, 2017 2:21 pm 
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Current ride: S1W,XB9R,690SM,TTR
Location: Preston, Lancs
Finally got round to lifting the tank this morning and it appears that the front coil connector was loose. Pushed back on and no tacho needle jumps and ran OK at idle (which it wasn't after the last ride). Good call Pash and Bonzo.

Hopefully all will remain well come March!


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