Bike idling at 4k when started cold? Is this normal?

usy · Derestricted Danger Joined: 28 Feb 2016 Karma :

Hi guys,

I recently bought a 2001 Honda CBR600 F-Sport. I had a quick question regarding the idling of my bike when I start it from cold. There is no choke on this bike and it idles at 4k when started cold, gradually lowering (becomes normal after about 5 mins).

I was wondering if this is normal? It's pretty loud and in the mornings can be annoying (unless I ride off straight away which I do not really want to as I've read it's not good for the engine).
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2001 Honda CBR600 F-Sport - Current
2009 Honda CBF125 - Sold

Fisty · Super Spammer Joined: 11 Apr 2007 Karma :

Start engine. Get on. Ride.

Really no need to warm it up for ages. And yes it is normal for your bike, they ave an automatic fast idle/choke to warm it up when it's cold.
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Quietly and consistently taking the piss.
TL1000R | Hayabusa | ZXR400 | TL1000S | Bandit 400 V
Fatter and faster than Fret

P. · Red Rocket Joined: 14 Feb 2008 Karma :

Wax idle unit. Yes it's normal. I'd just start and go gentle for a few miles.

Itchy · Super Spammer Joined: 07 Apr 2005 Karma :

ADSrox0r · World Chat Champion Joined: 23 Oct 2012 Karma :

The only thing with a wax idle circuit is it holds it at a specified rpm for a specified amount of time, which means if you pull away and ride straight off with no stops you're fine. But if you pull away and have to pull up to a junction, what tends to happen is you clutch out and get a shock because the bike is still 'idling' high and lurches on you.

I've had the Viff do it to me and a chap I know lunched his Blade into a parked car because of it.
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Current bikes: '08 VFR 800 VTEC(yo) , '07 ZZR1400 Winter hack: '95 Aprilia 650 Pegaso Currently lusting after: RC30

ragamuffin · Borekit Bruiser Joined: 23 May 2015 Karma :

Hi Usy.

I can't help you with your situation and I have a similar one.
I have a 125 gamma and it ides nice at 2.5k but if I turn the screw it drops to 1.5k and cuts out.
It won't idle between 1.5 and 2.5k.
I also have this problem.. when my lights are on the tick over drops..1.5k
So if I run her at 2.5k and turn the lights on, the tickover drops to 1.5k and cuts out!
So I'm constantly fiddling with the screw.
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Suzuki gn125 (dropped valve) Sym Wolf 125 (sold) sky jet 125 cbr repsol replica (sold) Suzuki RGr 125 (current)

craigs23 · Mr Muscle Joined: 08 Jun 2005 Karma :

I had a CBR600F and was alarmed at first at how fast the engine idles as standard when warming up.

Just a CBR600F thing, my friend's did the same, nothing to worry about.

AdamEf · Nova Slayer Joined: 19 Dec 2015 Karma :

Found this on the CBF600 that the training school used when I was doing DAS. The lurching in the first few minutes of each session always made me feel like I'd lost my ability to control the clutch properly and threw my confidence first thing each day. It was fine after a few minutes though.

-Matt- · World Chat Champion Joined: 28 Apr 2013 Karma :

I wouldn't worry about it, mines FI and does the same, particularly when its cold.

As people have said just start it up and set off taking it easy until its warmed up a bit. I usually start up and go within 10 seconds.

usy · Derestricted Danger Joined: 28 Feb 2016 Karma :

Thanks everyone for your replies. Very helpful. I guess I'll just set off straight away too. Smile

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2001 Honda CBR600 F-Sport - Current
2009 Honda CBF125 - Sold