Hi from London.
There are some old posts here re. neutral switch problems.
I encountered this problem with my CBRXX5 less than a year ago.'Usual symptoms: bike fires up and runs well for any journey but once up to temperature (85-100 degrees) bike will not restart when switched off (or more embarrassingly if mistakenly stalled in heavy traffic!). The neutral light doesn't light up when in neutral and the bike behaves as though it's in gear, (my clutch switch override has never worked!). Once the bike cools down again whilst switched off, it will restart fine once the temperature gets down to around 75 degrees.
On advice I changed the neutral switch for a Tourmax replacement item for about £10 on ebay. The old and new switches looked identical and the original seemed to operate as per new. On closer inspection I noticed that the spring loaded contact on the original switch had worn down by about 1mm-1.5mm. This was obviously the problem as the replacement cured all symptoms once installed. I just thought I'd share that for anyone suffering the same problem.
My present question is this: 8 months on from replacing the neutral switch, I have had exactly the same problem again!!! I have just had to replace the neutral switch again for the same reason!!! I have been riding for 40+ years on countless machines of all ages (except new!) and I've never had to change a neutral switch!!! Why is my bike 'eating" neutral switches???
2005 CBR XX5 low mileage, well maintained, ridden all year round, regular oil changes, parked outdoors, no other mechanical problems.