some good news,Yamaha are going 2 repaint my engine and supply new covers,oil feeder pipes and all the other bits.bad news is it's going 2 take 3 weeks.and now on 2 the running problems.i'm a time served mechanic so i thought i'd have a look at the bike.this is what i've found.some kind of silt in the tank,it's found its way through the filter and the fuel lines 2 the single injector.2 sort the problem i reconnected the injector,spun the engine while blowing compressed air back through it.then all the lines and cleaned the pump.THE FILTER IS NOT UP 2 THE JOB,so i cut it open,blew it out and superglued it back 2gether.refitted everything and its bloody perfect now.starts and runs lovely.12 years well spent as a grease monkey(mechanic):-)