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Neutral Light failure on heat soaked engine

R

Richard Martin

Just got it firing!
Joined
Nov 26, 2014
Messages
18
Location
Wellington, New Zealand
Anyone experienced the neutral light failing to come on after being stopped for a while with a heat soaked engine. This never occurs with the engine cold, only after being stopped following a minimum half hour run. The engine is always turned off when in neutral.
The model is a 1200 4V Sport, hatched in 2010 with now 31,000km on the clock.
I suspect the sensor on top of the gearbox is being affected by both heat and age. Any thoughts on this ?
 
Sometimes the connection to the sensor is not good. However once you get to it to check the connection, you might as well just replace the sensor. Do make sure you have a good, clean connection before you button everything up.
 
If you want to just fix connection and are good using a long needle nose pliers, it's doable. I reach in and slide the connector off, It's a top hat post on sensor and the spade connector has a slot in it, I just squeeze slightly on the spade and make sure it's a snug fit w/you slide it back on. I find that easier than removing the tank & airbox unless it's the sensor. By now it could have a bit of corrosion on it too.
 
I did replace the sensor with a new one and also discovered another avenue to get at the thing without removing the tank and airbox. Take off the right hand side front footrest and brake assembly. Four bolts and zip tie it to the frame further back and access to the neutral sensor is easy.
Incidently the problem was fixed with a new part. Good as gold since.
 
Interesting that the neutral switch doesn't appear in any of the spare parts manuals I have. I also looked thru the Norge and Breva without success.

Perhaps my eyes are just painted on?
 
I have this same exact problem. But I can’t find the sensor. Could anyone help point me in the right direction please? Can it be seen from the side or is it from looking up from beneath? I’m not usually this stupid.

thanks,

david
 
David Bracey said:
I have this same exact problem. But I can’t find the sensor. Could anyone help point me in the right direction please? Can it be seen from the side or is it from looking up from beneath? I’m not usually this stupid.

thanks,

david
Click to expand...

At the rear of the gearbox on the top side. It is buried under the battery holder so not easy to get to like on a 5 speed.
 
Well, I decided to tackle this today and I have to say I doff my Moto-Guzzi cap to you guys that can change that sensor from the side. I ended up with tank and air box off again.

Having removed the sensor I can see why the connection is dodgy. Amongst a very big list of crap design choices made in Mandello del Lario this has to be near the top.
 

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The neutral light switch on my B1100 failed having done about 50,000 miles. I went through all the connection checks to no avail and eventually took it out, checked it's operation which was OK. I found in my collection of old unloved washers one that was the same size and type as the original but 0.5mm thick instead of the original which was 1mm thick. Problem solved.
 
Davy said:
The neutral light switch on my B1100 failed having done about 50,000 miles. I went through all the connection checks to no avail and eventually took it out, checked it's operation which was OK. I found in my collection of old unloved washers one that was the same size and type as the original but 0.5mm thick instead of the original which was 1mm thick. Problem solved.
Click to expand...
Hi Davy, you beat me to it! My sensor also tested out good but there was a bit of play in the spring so I swapped it out with a new one. I also wired in a new spade connector as well. But after fitting it still didn’t work until I backed it out a bit and fitted a washer.
 
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