30-07-15, 10:24 AM
I used to swear by Iridium plugs on my previous bike (Aprilia Futura) until one time I couldn't get them and used standard plugs instead, but still got the same massive improvement that you get when you replace worn plugs with new ones. The Furura needed new plugs every 8,000 miles and there was a real difference when they were replaced but I just haven't found that at all with the gen1, it just doesn't seem to wear out the plugs in the same way. 16,000 miles from a set and there is a barely noticeable improvement when new plugs are fitted. I don't know if that also applies to a gen2 and of course YMMV.