Road is waaay too long for almost all tracks. You wanna go up two on the rear to start with and see how that works. You may top out, but I doubt it. It's better to go up on the rear rather than down on the front as smaller sprockets give the chain a hard time. Two up should be ok with a standard chain - another reason for not going down on the front.
_________________
MC21SP Plaything
BMW F800GS Bumblebee
Triumph 9551 Daytona Big boys toy
FJ1100 Sporting relic
GTS1000 oddball