Re: Running rich

[Bob Hadden <kbhadden@xxxxxxxxxxx>]

Peter,  Here is my list, though it is likely not complete:
- -Check valve adjustment.  You have to be picky with this.
- -Check compression.  Should be the same on both sides.  Hopefully at 
what ever the spec is.
- -Confirm the ignition timing via a timing light.  The oil heads spark 
both plugs together, I believe, so it should be identical side to side.
- -Get new plugs.  Perhaps one is bad.
- -change injectors side to side and see if the problem changes with them.
- -Obviously, the synch is important.  0=0 has nothing to do with this.

Let us know what you find.

Bob Hadden '98RS, '62R27

On Sep 1, 2004, at 9:17 PM, Pieter de Koninck wrote:

> The soot is black. The bike doesn't misfire, but it does backfire 
> occasionaly.
> What I am trying to determine is why one cylinder runs richer than the 
> other.
> What part of the fuel system (or ignition) could be out of balance to 
> cause
> this?
>
>
> --- Wayne Woodruff <wayne@xxxxxxxx> wrote:
>
>> On Wed, 1 Sep 2004 12:25:49 -0700 (PDT), you wrote:
>>
>>> 99 R1100R. Remus exhaust, no O2 sensor, beige Cat Code plug, CO pot.
>> Motronic
>>> reset after modifications.
>>>
>>> The right cylinder's spark plug is consistantly sootier than the left
>>> (which
>>> looks OK). I assume the bike is running rich on one cylinder (the 
>>> right
>>> one,
>>> sitting on the bike).
>>>
>>> (A sidebar: this is the cylinder that broke a piston ring late last
>>> year.
>>> suspect there is a connection between that and the rich mixture.
>>> Unburnt fuel
>>> blowing by the rings and diluting the oil?)
>>>
>>> Where should I start? TPS 0=0? Fuel injector? Would an aftermarket 
>>> chip
>>> be of
>>> any use? The bike has had all the usual tune-ups performed--valves, 
>>> TB
>>> sync.
>>>
>>
>> Well, look at the symptom.  If the right plug is dirtier, than it is
>> either not firing correctly,  it is getting too much fuel, or perhaps
>> the ring broke again and you are burning oil.  I can't think of too
>> many other causes for that problem. What color is the soot, black or
>> brown?  Black is likely too much fuel, brown could be oil.  How bad is
>> the soot?  Does it cause misfire?
>>
>> Solve the problem before introducing more variables like 0=0 or an
>> aftermarket chip.  It will only make things worse.
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