16-07-13, 02:26 PM
I think Yamaha are slightly more likely to use metal press forming then glassblowing techniques, but that said, a lot of teams at the TT races, after they got their bikes through scrutiny, would use an airgun to 'pop' the tank, expanding it by an extra litre. Maybe a previous owner of your bike as done the same? Do your knee recesses bulge excessivly? Does your tank fit very badly?