john21z wrote:does any body know if a24s box will fit a 21 because mine has had it and the only one i can find in staine less is a 24s i know it a big job to fit a standard one. thats why wos thinking stain less 4 peace ov mind. plus any one fancy giveing me a lift wiv it free beer and i live near some ov the best riding roads in britan

Yes but not a direct swap.
You need the NC24 high-level exhaust and rearpegs from the NC24 to mount it.
OR you can butcher to stainless steel item to make the NC21 exhaust fit.
I'd go for the NC24 option but finding an NC24 end-can / link pipe assembly is tough and finding rear pegs is tough too.
Collectorbox rot is a big issue on these bikes and expensive and time consuming (total strip/down / engine out bike job)
but it can be done.
Here's an NC24 collector.. note the short outpipe designed to take the NC24 link-pipe end-can unit.
Here's an NC21 collector.. note that is has a much longer and lower outpipe designed to mate-up with the low-level NC21 exhuast
