bike still takes forever to warm up...

[debtman7]

Ok just to verify that this is to be expected. My GS just had a nice rejet. It's bone stock, #40 pilots and #125 mains, 1 washer under the needle, 3 turns out on each mix screw. It no longer dies when I try to give it throttle cold, but it still takes forever to warm up. If I adjust the idle to the point where after a minute I can turn the choke off, then after 10 minutes of riding it's idling at 3,000 RPMs. If I adjust the idle when the engine is fully warmed, then even after idling for 3-4 minutes with the choke on, it still won't idle without choke. I have to ride it around for a few minutes before I can shut the choke off.

It's 85 degrees outside. I've put in larger jets.

Should this still be happening?

[Egaeus]

I have a similar setup except for the fact that I'm using the K&N drop-in.  I ride with the choke on for a minute and it will idle.  It takes a couple of minutes if I don't ride.  It doesn't sound too abnormal.

[debtman7]

I figure it's normal, since otherwise the bike runs beautifully. But I've read old posts where people did a rejet and claimed that they didn't even have to use the choke anymore...

[Wrecent_Wryder]

I5

[Egaeus]

Yeah, I've seen those posts.  Either they are running really rich during normal operation, or they are working some kind of voodoo.  There's a choke for a reason.  You may not need it as much, but you still need it.  The choke adds fuel to the mix.  This is done to compensate for cold cylinders.  The fuel doesn't atomize as well in a cold engine, so the air-fuel mixture is lean.  If they're getting enough fuel to start cold, then they're running waaaay rich during normal operation.  Pretty much alll engines have a choke of some kind.  Whether manual, automatic, or computer controlled injectors, more fuel is injected into the cylinders when cold.