Running on 3 cylinders

[steeeve66]

The bike shop said it was a fouled plug no 2 they put a new one in, I started up ready to ride home and running on 3 again mechanic comes out changes no 1 plug and its ok, they say it is over fuelling causing the plugs to foul up. Strange how it has been ok since September. I Ivanised the bike after I bought it but am not sure what had been done by the previous owner as the main jets were not stock. It may have been on a Dyno  and maybe the Pilot jets have been changed to larger ones anyone have any experience with this issue?


Thanks


Shack

Did they replace just the No.2 plug then? And then just the No.1? And, as asked previously, what colour were they? Might have a bearing on why mine stopped firing. Odd that they only replaced one plug tho? Why not do all?

No talk of hot, sunny weather pls - under 4cms of snow and ice here...

S