rear tanks on a 640 Ad.
 

Does anybody know how complicated it is to replace a 2003 Adveturer's exhaust system and put on a 1997 system instead ?

The reason is that you can still get 1997 rally tanks (for the rear of the bike) but can't fit them to the 2003 model because the exhaust is in the way. So you need to move that before fitting the tanks. You need a lower exhaust on the right hand side rather than the high pipe on the right.

Has anybody done this or know anything about it ?

thanks,

Simon