It would be easier to buy a Harley to get the belt drive ! Or , I saw a BMW F800 with a belt drive too. I didn't know that about the less friction , I thought I read that a chain was most effiecient. A Norton 961 is not the bike for you if you want off the shelf upgrades and products . Triumph . Harley , BMW etc.. the list goes on . If you do off road alot (sand,rocks gravel), a chain and sprockets is less sussceptable to damage from grit and debris .