i never had much issue with heat, i pulled mine, and put them in to keep all the low end tq i could when i added cams. Kevinx just posted a pic of dyno comparisons between two basically identical bikes, one with and one without cats,, the drop in tq was pretty big without. with my tour lowers on and vents shut it stayes cooler then with them open. do you have any mods done, O2s unplugged, tuner,,etc?
2012 Cross Country(Imp blue)
de-badged,(self tinted) Klockwerx flare, passenger backrest, passenger touring floorboards, VictoryHID kit, Miller Mufflers short baffles,Lloyds air filter(from witchdr.)Lloyds timing wheel(6*), adjustable drop link, cut seat, removed cats, PCV w/at.
1978(2009) Honda cb750 chopper