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+--- Thread: Cold start idle rpm (/showthread.php?tid=5268)
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Cold start idle rpm - pittycheria_imp - 12-26-2017
Does anyone else have a problem with a high idle RPM on a cold start / cold day (< 55 f) ? My 2017 ex starts with a high idle that normalizes once engine heats up. No biggie but was wondering if this is normal.
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RE: Cold start idle rpm - Lord Popgun - 12-26-2017
What do you call high? What RPM?
RE: Cold start idle rpm - Houtman_imp - 12-26-2017
Is this not normal , like having the choke on with carb. bikes ?
cars do the same when cold , higher idle for short while and than back to normal .
RE: Cold start idle rpm - Rocky_imp - 12-26-2017
Anytime I start my CB between April and October it immediately has a higher idle for several minutes before it warms up and settles down.
Cold start idle rpm - pittycheria_imp - 12-26-2017
(12-26-2017, 12:36 AM)Lord Popgun_imp Wrote: What do you call high? What RPM?
Between 1500 and 1800, stays high when changing gear and pressing clutch.
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(12-26-2017, 01:04 AM)Houtman_imp Wrote: Is this not normal , like having the choke on with carb. bikes ?
cars do the same when cold , higher idle for short while and than back to normal .
It probably is the same thing and is normal.
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RE: Cold start idle rpm - the Ferret - 12-26-2017
Mine warms up at about 14000..drops to 12000..then to 1000
If I take off too soon after starting, it will hold the higher rpms for the first mile or so
RE: Cold start idle rpm - greekcb_imp - 12-26-2017
(12-26-2017, 01:46 AM)The ferret_imp Wrote: Mine warms up at about 14000..drops to 12000..then to 1000
If I take off too soon after starting, it will hold the higher rpms for the first mile or so
My 14 does this exactly as well
RE: Cold start idle rpm - Lord Popgun - 12-26-2017
Yeah, thats normal. As the engine warms up the ECU commands the IACV to change the idle air and the idle speed goes down.
FYI, There is no value for cold idle in the service manual that I can find. Only to warm the engine then check for 1100+- 100rpm with a tach that can read at least 50rpm changes.
Cold start idle rpm - pittycheria_imp - 12-26-2017
Thank you all
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RE: Cold start idle rpm - Lord Popgun - 12-26-2017
Ferret, 14000! Then 12000! Man, you sure got a different engine that I did!!!
