Eddie Picasso wrote on 07/24/16 at 16:39:39:Also, I have changed the fuel tap to the Raptor type recommended. After running the bike for only a few minutes the filler cap starts to whine. Once opened the intake of air is very obvious. Could this be a problem with lean running and should the filler cap be vented?
Raptor type or oem raptor from Yamaha? the raptor type sold for cheap on ebay are junk ,you want the real thing.