ZZR1100 sidestand issues.

Hey guys,
Have got myself a ZZR1100, 91 model, bit of a project to fix up and get roadworthy, and get on the road.
I'm having trouble working out some starting problems.
Bike starts and runs well on the centre stand.
Put the sidestand down and the bike cuts out.
Start the bike with sidestand down and clutch in, bike starts no worries, let clutch out, bike cuts out.
There wasn't a sidestand switch on the bike when I got it.
Have got a secondhand one from the wreckers and fitted it.
But switch seems to work in reverse?
Have replaced clutch switch with a new one.
Still no joy.
Neutral switch seems to work correctly?
Lights up when in neutral, goes out when in gear?
Pretty much, its doing my head in!
Any help or suggestions would be much appreciatived.
Thanks.
Pat.
Have got myself a ZZR1100, 91 model, bit of a project to fix up and get roadworthy, and get on the road.
I'm having trouble working out some starting problems.
Bike starts and runs well on the centre stand.
Put the sidestand down and the bike cuts out.
Start the bike with sidestand down and clutch in, bike starts no worries, let clutch out, bike cuts out.
There wasn't a sidestand switch on the bike when I got it.
Have got a secondhand one from the wreckers and fitted it.
But switch seems to work in reverse?
Have replaced clutch switch with a new one.
Still no joy.
Neutral switch seems to work correctly?
Lights up when in neutral, goes out when in gear?
Pretty much, its doing my head in!
Any help or suggestions would be much appreciatived.
Thanks.
Pat.