random MOT Question

[Fisty]

hi all, The neutral light has died on my zxr 400, im told its a problem on sesnsor within the gearbox.
Anyway it will cost alot to sort and im strapped for cash.
Does anyone know if a none functioning neutral light fail an MOT?

Thanks, tom
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Quietly and consistently taking the piss.
TL1000R | Hayabusa | ZXR400 | TL1000S | Bandit 400 V
Fatter and faster than Fret

[hmmmnz]

you don't need any functioning warning lights for a mot.
just check that the bulb hasnt blown before you assume its something harder
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the humans are dead
I kick arse for the lord
Wiring Diagrams BIDNIP it bitches

[stinkwheel]

And the sensor won't be very complex if it is that. It's usually just a small plunger on a spring with a wire on one end. Probably just needs a clean.

All they usually do is make contact with part of the gear selector mechanism when it's in neutral and allow the warning light to earth itself. Nothing overly complex.

I don't know the exact details of your bike but it is usually somewhere in the area behind the front sprocket (under the plastic cover next to your left foot as you sit on the bike) with a single wire going to it.

Assuming the wire is intact (broken wire is another possible reason for neutral light failure, it's pretty exposed), the switch itself should simply unscrew. Just watch for a tiny little spring pinging off into the workshop drain as you do so. Then just a case of rubbing any muck off the contact with emery paper and refitting it.

Mind you, it is almost certainly the bulb because kawasaki use the neutral switch in their safety interlock. If you can start the bike in neutral without touching the clutch, the neutral switch is working ok.
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“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.

[Fisty]

hi again, thanks for your help!

Its def not the bulb or the wiring, that all checks out ok as does the sensor just infront of the sprocket.

im gonna fit a digi gear indicator methinks...........
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Quietly and consistently taking the piss.
TL1000R | Hayabusa | ZXR400 | TL1000S | Bandit 400 V
Fatter and faster than Fret

[stinkwheel]

[MattEMulsion]

I agree with stinkwheel, one of those components has more or less got to be faulty. The neutral switch/light doesn't get much more complex than a sensor, the wiring and the light on the dash.
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Yamaha YZF-R6

[carvell]

Have you used a continuity meter on the switch and the frame?

It should beep when in neutral, and be silent when in gear.
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Yamaha TDM 850

[mr.z]

Followup:

Bizzarely but its NOT the switch, it works perfetly (so does the spare) the problem is actually the tab inside the gearbox!

Apparently (a common fault) the brass neutral tab wears down, eventually so much that the switch isn't triggered, madness, but there's 3 others with the same problem an another forum, so just a shitty bit of design.. Engine out job to fix..

(think hes secretly pleased to have a feeble excuse for a tarty digi indicator)
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