Spad
XS400 Addict
What I the widest rear tire in inches or mm on an 80-81 XS400....Avon makes a Roadrider MT90V16 that is 5.4 inches wide that they say replaces a 130/90/16....Spad
When I had a 130/90-16 rear tire on my 2.50 16" mag rim there was only 3-4mm between the chain and the wheel. As for a set of 520 sprockets I have never seen a specific set for a xs400. Not sure any other bikes will work. Let us know if you find something.[/QUOTE
Wheel sprocket you can get from rebel gears and or sprocket specialities. Not sure where to source drive sprockets however.