There isnt really a set idle temperature. On a 90 degree day, probably just let it idle for a min. Just get everything moving. 75 degrees, same thing, maybe rev it once or twice. And a 30 degree day, choke for like 1 minute of idling time, choke off, rev it a bunch, once its warm enough to idle, let it idle for like 3 minutes. Before you ride it, do a couple revs and then go. Hope this helps!