I ran a .020 12:1 Wiseco with 93oct...really should be run w/ race gas, but it worked fine for me. The border is 11:1- that and higher needs race fuel. If you don't want the high compression, go with the stock 9.4:1 from Honda.
The only in-between I can find is a 275cc big bore with 10.5:1 where you would need to re-sleeve (Powroll, $315)
MY TOYS
406X Honda
Powroll stroker w/ Vesrah shorty rod
ProFab big bore
White Brothers cam
ported & polished head w/ +1 intake
Kibble White HD springs
38mm Keihin-choke removed
full DG RCM exhaust- want X-6
DID silent HD cam chain
K&N filter-No lid
02 Raptor-
High comp 720 kit
Web cam 461/496
K&N filter
Supertrapp exhaust
lowered 1.5"
92 250X-12:1 WIESCO .020/No-Toil filter
03 CBR954 - full 2brothers exhaust
95 Kawasaki Ninja ZX6 streetfighter
93 Honda XR80R
83 Z50R -K&N filter
98 Arctic Cat Cougar 550 liquid
86 Ski-Doo Citation