I've gotten to ride two days so far this week, following a no-ride week last week.
Yesterday afternoon and this morning, upon startup the idle speed was roughly 2000 RPM. Seems (and sounds) faster than usual.
Does it have anything to do with air temperature? Yesterday was mid-50s; this morning was 34�.
What's up with this?
Thank you for your help!
I believe the air temperature affects the 6th gen's automatic fast idle at start-up. My '04's idle speed is faster on cold mornings, too, or if the bike has been sitting outside in the cold for hours between starts.
Makes sense. I'll find out in about 45 minutes whether that pattern holds...
She's garage-kept, and it's still warm in there, but outside I'm showing 37�.
Normal behavior. You've discovered your fast idle "wax" unit. Idle will drop to normal as water temp hits 100.
Normal. The fast idle is higher when it drops below 50F or so. As the engine warms it goes back to normal.
Fast idle is to warm the engine up quicker. The faster an engine gets up to temp. the fewer emissions it emits.
[image: View Post]soichiro, on Oct 21 2009, 02:11 PM, said:
Normal. The fast idle is higher when it drops below 50F or so. As the engine warms it goes back to normal.
Fast idle is to warm the engine up quicker. The faster an engine gets up to temp. the fewer emissions it emits.
Sure enough... this morning was a 2KRPM idle (36� out), and this afternoon brought it to more like 1KRPM (75�).
What's a "wax unit?"
Thanks again, all.
[image: View Post]vthoky, on Oct 21 2009, 05:42 PM, said:
What's a "wax unit?"
The fast idle device contains paraffin wax. The volume of the wax changes with temperature (as the wax liquefies) which moves a piston. The piston moves a lever that changes the idle setting. Clever, those japanese engineers.
[image: View Post]vthoky, on Oct 21 2009, 05:42 PM, said:
...and this afternoon brought it to more like 1KRPM (75�).
Just a thought...you might want to increase your idle speed a couple hundred rpm. IIRC, the manual says 1200 or 1250 rpm at warm idle, +/- 100 rpm.