Spark Plug

Hi its me again
I just got hold of an IRIDIUM spark plug which require a lower voltagefrom a company I found on Ebay I also saved money as the plug for sale was not the same as mine so I contacted them to see if mine was available and it only cost £7.99 including postage next day.
My original plug was a C7HSA AND THE NEW ONE WAS A CR7H1X
If you would like the same or similar they do all bike plugs
L M SPARES
LONGWORTH LANE
BARTESTREE
HEREFORD
HR1 4DF
*****

They were very helpful
regards tufty

Was it worth buying,did it improve performance ?