[Diablo007]

My friend who was a Royal Enfield dealer in the '70's mentioned a conversion that had a drum that you could remove the sprocket from to make replacement easier, and I would guess to let you change tooth ratios.  Is there such a conversion available for the modern Royal Enfields?

[ace.cafe]

Check the Hitchcocks catalog. They had one for the iron barrel models.
You can only go higher in tooth count. Not smaller.

[johno]

Hitchcocks do the rear drum conversion for EFI as well
this is the drum
https://accessories.hitchcocksmotorcycles.com/accessory-shop/Rear-Wheel-Sprockets-Bolt-On/18715
then there are a few differently toothed sprocket rings to fit.

[Diablo007]

Thanks, I'll look into it.