Re: Fuel Economy Question-choke

---- "Travis B. Sawyer" wrote:

=============

Should be 1250 rpm when warm IIRC. Also, I don't think there is a
manual choke on the '99, there isn't on the '00. Until my bike is warm
it high idles at ~1500, all done by the ECU, no manual choke.
--

The 98 and 99 have a manual choke, it's right next to the turn signal switch.

Bob in Tucson
Then:
90 VTR 250
98 VFR 800
03 CBR F4i

Now:
01 VFR 800
04 Chevy Avalanche
Jato 10th scale race truck
Mini-T 18th scale race truck
Revo 10th scale monster truck
VFR@xxxxxx
http://vifferman.tripod.com/vfr_album/
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vfrlist@xxxxxx wrote:
> ---- "Travis B. Sawyer" wrote:
>
> =============
>
> Should be 1250 rpm when warm IIRC. Also, I don't think there is a
> manual choke on the '99, there isn't on the '00. Until my bike is warm
> it high idles at ~1500, all done by the ECU, no manual choke.
> --
>
> The 98 and 99 have a manual choke, it's right next to the turn signal switch.
>
Thanx for correcting me bob, color me 'stupid'.

(Cowering in my corner now ;)


--

-travis
'00 VFR - Yellow Submarine - Southern NH, USA
Custom Mirror Extenders http://users.adelphia.net/~tbsbjs/mirext.html
Dual-Star Heated Grips, High mount MIG Indy, Sargent seat

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Gidday Listers,

Just a word about idle speeds. Vehicle emissions at idle were the first
thing (after crankcase emissions) the EPA went for.

Leaning out mixtures at idle and increasing idle speeds are a cheap
method of reducing Hydrocarbon (HC - unburnt fuel) and Carbon Monoxide
(CO) emissions. But if the OEMs can meet the emission legislation by
increasing idle speeds alone then that's what they'll do - a cheap way
of meeting the legislation. Over the years idle speeds have crept up as
emission laws were tightened, so now we find VFRs with ridiculously high
idle speed specs (1250 when warm). Remember, manufacturers don't fit
emission controls to vehicles, they adopt measures to meet emissions
legislation, which may mean fitting devices (like PCV systems or EGR
valves etc).

Setting aside emission regs for the moment, if you'd like to reduce your
fuel consumption I suggest you adjust the idle speed on your VFR to as
low a value as possible without having 'rideability' problems (stalling,
hesitation etc). This is, of course, allowing for the assumption that
the VFR's properly professionally tuned in the first place, eg are
cylinder compression values OK, are idle mixtures correct etc? We need
mechanics trained to sense what a bike needs, not trained to set values
to OEM specs. An aside, there are so many bikes out there with the idle
speed cranked up by poorly trained 'technicians' in order to mask tuning
problems - but that's another story...

Regards,

Tom Heron


-----Original Message-----
From: vfr-bounces@xxxxxx [mailto:vfr-bounces@xxxxxx] On Behalf
Of Travis B. Sawyer
Sent: Wednesday, 21 June 2006 2:49 AM
To: vfrlist@xxxxxx
Cc: VFR@xxxxxx
Subject: Re: Fuel Economy Question-choke


vfrlist@xxxxxx wrote:
> ---- "Travis B. Sawyer" wrote:
>
> =============
>
> Should be 1250 rpm when warm IIRC. Also, I don't think there is a
> manual choke on the '99, there isn't on the '00. Until my bike is
warm
> it high idles at ~1500, all done by the ECU, no manual choke.
> --
>
> The 98 and 99 have a manual choke, it's right next to the turn signal
> switch.
>
Thanx for correcting me bob, color me 'stupid'.

(Cowering in my corner now ;)


--

-travis
'00 VFR - Yellow Submarine - Southern NH, USA
Custom Mirror Extenders http://users.adelphia.net/~tbsbjs/mirext.html
Dual-Star Heated Grips, High mount MIG Indy, Sargent seat

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On 6/20/06, Tom Heron wrote:
> of meeting the legislation. Over the years idle speeds have crept up as
> emission laws were tightened, so now we find VFRs with ridiculously high
> idle speed specs (1250 when warm). Remember, manufacturers don't fit

Hi,

How is 1250 ridiculously high? All my Hondas, from the late 70's
through the 90's, all have idle speeds around 1250. In fact, it
almost seems to be *the* idle speed.

The only vehicle I've had with a lower idle is my V8 Jeep, which is
around 600rpm.

--
Jeff
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---- "Travis B. Sawyer" wrote:

=============
vfrlist@xxxxxx wrote:
> ---- "Travis B. Sawyer" wrote:
>
> =============
>
> Should be 1250 rpm when warm IIRC. Also, I don't think there is a
> manual choke on the '99, there isn't on the '00. Until my bike is warm
> it high idles at ~1500, all done by the ECU, no manual choke.
> --
>
> The 98 and 99 have a manual choke, it's right next to the turn signal switch.
>
Thanx for correcting me bob, color me 'stupid'.

(Cowering in my corner now ;)


--

Don't sweat it Travis, I wouldn't have known if I hadn't owned both a 98 and an 01.

Bob in Tucson
Then:
90 VTR 250
98 VFR 800
03 CBR F4i

Now:
01 VFR 800
04 Chevy Avalanche
VFR@xxxxxx
http://vifferman.tripod.com/vfr_album/

http://www.frappr.com/?a=myfrappr&id=72717
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On 20 Jun, 2006, at 20:05, Jeff Fitzsimons wrote:

> On 6/20/06, Tom Heron wrote:
>> of meeting the legislation. Over the years idle speeds have crept
>> up as
>> emission laws were tightened, so now we find VFRs with
>> ridiculously high
>> idle speed specs (1250 when warm). Remember, manufacturers don't fit
>
> Hi,
>
> How is 1250 ridiculously high? All my Hondas, from the late 70's
> through the 90's, all have idle speeds around 1250. In fact, it
> almost seems to be *the* idle speed.
>
> The only vehicle I've had with a lower idle is my V8 Jeep, which is
> around 600rpm.

Don't (some?) older BMW R-bikes have idles around 800rpm?

later,
Johnj
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My new R1150RT has to idle around 1300 rpms or it stalls out.

On 6/20/06, John Johnson wrote:
>
> On 20 Jun, 2006, at 20:05, Jeff Fitzsimons wrote:
>
> > On 6/20/06, Tom Heron wrote:
> >> of meeting the legislation. Over the years idle speeds have crept
> >> up as
> >> emission laws were tightened, so now we find VFRs with
> >> ridiculously high
> >> idle speed specs (1250 when warm). Remember, manufacturers don't fit
> >
> > Hi,
> >
> > How is 1250 ridiculously high? All my Hondas, from the late 70's
> > through the 90's, all have idle speeds around 1250. In fact, it
> > almost seems to be *the* idle speed.
> >
> > The only vehicle I've had with a lower idle is my V8 Jeep, which is
> > around 600rpm.
>
> Don't (some?) older BMW R-bikes have idles around 800rpm?
>
> later,
> Johnj
> _______________________________________________
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> Vfr@xxxxxx
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>


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Gidday Chris,

If your RT has to idle at this speed there's something wrong. Could be
anything from low compression to leaking valve(s) to incorrect
electronic adjustments or one or many of a hundred things besides.

A competent mechanic'll fix it.

Regards,

Tom H.

-----Original Message-----
From: vfr-bounces@xxxxxx [mailto:vfr-bounces@xxxxxx] On Behalf
Of Chris Burgess
Sent: Wednesday, 21 June 2006 2:35 PM
To: John Johnson
Cc: VFR list
Subject: Re: Fuel Economy Question-choke


My new R1150RT has to idle around 1300 rpms or it stalls out.

On 6/20/06, John Johnson wrote:
>
> On 20 Jun, 2006, at 20:05, Jeff Fitzsimons wrote:
>
> > On 6/20/06, Tom Heron wrote:
> >> of meeting the legislation. Over the years idle speeds have crept
> >> up as emission laws were tightened, so now we find VFRs with
> >> ridiculously high
> >> idle speed specs (1250 when warm). Remember, manufacturers don't
fit
> >
> > Hi,
> >
> > How is 1250 ridiculously high? All my Hondas, from the late 70's
> > through the 90's, all have idle speeds around 1250. In fact, it
> > almost seems to be *the* idle speed.
> >
> > The only vehicle I've had with a lower idle is my V8 Jeep, which is
> > around 600rpm.
>
> Don't (some?) older BMW R-bikes have idles around 800rpm?
>
> later,
> Johnj
> _______________________________________________
> Vfr mailing list
> Vfr@xxxxxx
> For subscription and delivery options:
> https://lists.cs.wisc.edu/mailman/listinfo/vfr
>


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Box Hill Institute of TAFE is committed to protecting your privacy and the confidentiality and security of personal information provided by you to us. For further information visit www.bhtafe.edu.au or email privacy@xxxxxx.

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