It can also be caused by the forks not being aligned in the triple clamps straight / parallel, this was the cause for the same problem on my bike. I adjusted them by trial and error and now it is fine.
I think some other people on this site have fixed it by re-aligning the back wheel straight in the swing-arm. So if you have recently replaced your rear tire or adjusted your chain I'd say check there first.
Hope this helps....
TBA, Stainless extractors / drag pipes, 65mm over forward controls, Thruxton needles, 904cc, head ported, lowered 1-inch, Console removed, relocated battery box, Australia.
|