Has anyone tried them on a NC30/35? as i need some new spark plugs, and don't know whether to buy the iridium ones over standard.

Cheers

Just buy standard. Iridium are kak

Yep
Have a set in my nc35 also have 12 for spare lol
So for the next few services that's what im gonna be using
I cant tell u if they r any better than std plugs as I never used my bike with std plugs

I have been offered a set for £25 delivered,Which seems really cheap

I've only ever used iridium plugs in cars, any work well in cars, youd prob never have to hange the plugs again if you put them in, the ones in me carhave a 60000 mile service life! Just make sure there the right heat range and not cold race plugs.
Cheers
Ian

I have NGK iridums in the NC30 and it starts and runs fine.

No perceivable difference over standard plugs but I do believe they last a lot longer