RE: CCP,gas mileage and vibration

["Minor, Bob" <Bminor@xxxxxxxx>]

Bob,
My bike is set up like yours except that I have never readjusted the TPS since I did the zero=zero a long time ago.  Are you able to set the idle screws close to the 1.5 turns out after reducing the TPS idle voltage?  Also, if it's not too much trouble, can you check your TPS voltage?

Thanks

Bob Minor '96RS '97 F650ST

- -----Original Message-----
From: owner-oilheads@xxxxxxxxx [mailto:owner-oilheads@xxxxxxxxx]On
Behalf Of Bob Hadden
Sent: Thursday, June 10, 2004 10:44 AM
To: oilheads@xxxxxxxxx
Subject: Re: CCP,gas mileage and vibration


Peter,  What you are likely seeing is that the motor is surging a bit 
when the ccp is in place.  I have the ccp out and am getting 40+ mpg 
with very smooth running.  Actually, I have never been on a smoother 
oil head, and anyone who has ridden my bike agrees with that.

What I have done is use Autolite plugs, remove ccp, and do proper tune 
up.  This means be picky about the valve adjustment, and do a proper 
zero = zero as detailed on the ibmwr web site.  All that should get you 
running smoothly without surge.  If your mileage is not good, you are 
running too rich.  Think of the tps set point (normally 0.37 volts) as 
the base setting to determine how much fuel you get with a given 
throttle opening (read 'amount of air').  If you are running rich, you 
need to lower this setting.  Mine is much lower now, but I don't 
remember the number.  So you bring the value down until you get both 
good performance and good plug readings.

One easy check on the mixture over the long term is to look at your 
exhaust pipe outlet.  I get almost no soot when running my finger over 
the inside of the pipe.  Most other oil heads are all black and loaded 
with soot.

Let us know how you progress with this.

Bob Hadden '98RS, '62R27


On Jun 10, 2004, at 11:40 AM, Peter J Minkow wrote:

> A number of months ago, I posted a request for info about how to 
> increase my
> low gas mileage (low 30s) on my '95 R1100R with catless Remus exhaust. 
> Oxygen
> sensor is in place. I had removed the ccp per suggestions on the list 
> and
> achieved better power and worse gas mileage. I decided to replace the 
> ccp and
> my mileage bounced back up to the low 40s. The problem is that I then
> developed an odd vibration at about 3500 rpms. I decided to remove the 
> ccp,
> once again, to see what effect that had on the vibration. The 
> vibration pretty
> much disappeared. So, do I have to choose between high gas mileage and 
> smooth
> engine performance or is there a way to get both?
> TIA
> Peter

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End of oilheads-digest V1 #211
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