F4i - Main Forum Main F4i discussion board

Cold Start Idle High?

Old 11-02-2011, 09:36 AM
Junior Member
Thread Starter
Join Date: Oct 2011
Posts: 14
Default Cold Start Idle High?

On idle in 20* weather first startup my f4i idles around 2800-3000rpm. Is this too high? Once warmer it settles around 1200rpm.
Old 11-02-2011, 10:02 AM
74demon's Avatar
Administrator and MVN, March 2012/Oct 2013 ROTM
Join Date: Sep 2011
Location: socal 949/951
Posts: 7,942

sounds about right
Old 11-02-2011, 12:07 PM
FL03CBRF4i's Avatar
Join Date: Oct 2011
Location: Orange Park, FL
Posts: 36

Originally Posted by north View Post
On idle in 20* weather first startup my f4i idles around 2800-3000rpm. Is this too high? Once warmer it settles around 1200rpm.
That's where it should be.
Old 11-02-2011, 05:56 PM
Join Date: May 2011
Posts: 66

I noticed that to. It's my foray winter with my bike, but makes sense, just warming the bike up.
Old 11-02-2011, 07:32 PM
jeffjones's Avatar
Welcome Crew and May 2012 Ride of the Month
Join Date: Aug 2010
Location: Kitchener, Ontario
Posts: 1,564

Everyone in my complex hates my devil exhaust when it warms up at 6am lol.
Old 11-02-2011, 10:14 PM
R Dub's Avatar
October 2011 ROTM
Join Date: Feb 2009
Location: Burbs of Chicago
Posts: 1,340

these bikes have an automatic choke so yes it is going to idle high when its cold and then when it gets to about 95-100 degrees F the idle will come down.
Old 11-03-2011, 12:11 AM
Senior Member
Join Date: May 2006
Location: port richey FL
Posts: 402

the high idle is normal, its operated by the wax unit which is heated by coolant to allow a gradual idle drop as the motor warms up. totally normal, admittedly kind of irritating, I HATED this on my samurai.
Old 11-03-2011, 03:41 AM
DonnyBrago's Avatar
Senior Member
Join Date: Aug 2009
Location: UK
Posts: 377

It is normal.

They have a wax idle unit, this is basically a wax filled cylinder with a finger that pokes out and opens the throttle slightly. Coolant flows around the wax part and when hot enough the wax melts, the finger retracts and your idle drops.
Old 11-03-2011, 11:34 PM
Senior Member
Join Date: Jul 2008
Location: Mesa AZ
Posts: 2,012

Highest my bike gets is about 1900rpm, but it doesn't get below 40* here very often
Related Topics
Thread Starter
Last Post
Kopi Ko
F4i - Main Forum
07-02-2013 06:59 PM
Gnarly 928
General Tech
03-28-2013 12:07 PM
F4i - Main Forum
06-15-2012 08:22 PM
F4i - Main Forum
05-07-2012 06:08 PM
F4i - Main Forum
04-21-2006 08:58 AM

Thread Tools
Search this Thread
Quick Reply: Cold Start Idle High?

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.