Bought it privately I'm afraid, I've asked the seller for any tips/info but I'm not going to threaten or harass him as it was my decision to buy it in the first.
I doubt Yamaha would recall it now, although I'll phone them tomorrow anyway.

The CO1 setting was at 30, I've since ajusted it to 0,
10,15, 35 but it doesn't seem to make a difference :/
I read about adjusting the TPS so I might try that before shelling out on a new bit.

Thanks for the replies so far guys, I'm a little miffed and worried to say the least.
Was a cracking bike to ride fir that first mile though!