Perhaps a sprocket change for lower revs?

[736cc_imp]

Sprocket Specialists can make any size rear sprocket for any motorcycle. Just mail your stock sprocket and by using that bolt pattern on one of their blanks, any # of teeth can be had. They can also "Swiss cheese" it w/ lotsa trick holes! Very reasonably priced, too .
That may be only possible for rear sprockets as front sprockets sometimes need special machining.