I try to keep my stuff right around 150 or so, then I usually add a fan to take it back down to 130-ish just because I'm paranoid.
It's my understanding that anything under 180 is generally acceptable...be careful gearing, though. On my Circuit when I was testing, two teeth made a HUUUUUGE difference. I'm talking like a 55 degree difference. So if you want to gear it up, definitely go only one tooth to start and test from there.
In Life, Try to be the Kind of Person Your Dog Thinks You Are...
Torment, C4rcu4t, AMP DB, Axial Digger, Night Vapor, Archer, Firebird Stratos, Phantom 3 Standard, Power Vee, Bristol Bay, Duck, Volere, Dragon Force Yacht, Springer Tug