I have been trying for a few weeks to come up with a belly pan that fits my 98 TBS. There are belly pans that fit the trident (same motor) but the exhaust pipes differ and cause a fitment issue. Right now I am looking into getting a custom exhaust fabricated from a trident and using a trident belly pan. If anyone has a better solution I would be interested also.
Here is a link to a trident belly pan:
nullTriumph belly pan and accessories
