Track gearing

[Switch]

I'm changing the track on my 04 polaris 700 Switchback from the original 1 1/4" to a 2" track (144"). The chaincase gearing is 23/39. Anybody who has done this change what gearing did you go to and what were the results. I'm thinking 20/39 or 21/41 any suggestions out there.

 

[99summitx]

do you have the clearance for the 2"? I dropped to a 8 tooth drivers which geared it down for the 136 to 144 RPM stayed very close, will gear down when go to 151.