my brother inlaw bought a 650 1999 aprilia, all seems to be correct with adjustments, runs sweet when it has been running that day on and off but is a pig to try and start when cold, was there a problem somewhere with carbys or fuel delivery? is there some hidden nack?is it a lemon year?what corrections can be made? he is ready to set the shed on fire , should only be a simple thing but he is at his wits to what, can anyone maybe shed some light, cheers