Broken Reed Valve, most likely.
We have a TON of good Yami guys here too. You might consider asking...
http://www.greenhulk.net/forums/
--
mark
"fraser95" <snwilliamson DeleteThis @hotmail.com> wrote in message
news:1158784998.206145.253990@k70g2000cwa.googlegroups.com...
> 2002 GP1200R, 35hrs, fully serviced, starts OK, rev's through to top
> end no problem, but "boggy" low down rev;s under load in water and
> fuel consumption seems to have gone up...changed plugs, checked for
> obvious loose ignition leads; looking for help before we run out of
> above freezing weather and can't afford the petrol.
>