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From: FB on 13 Aug 2006 12:57

Kent wrote:
> I tryed your chemtool B-12 today in my 90 CBR1000 (on topic?) and it worked
> great!

It isn't *my* B-12. I don't distill it in a shed in the woods, I don't
drink it, I don't sniff it,
but I use it on a regular basis to keep my carburetors working as they
were intended to work.

The EPA clean air requirements call for very lean idle mixture to pass
the HC tests.

The ubiquitous constant vacuum carburetor runs on its idle jets about
95% of the time, unless the rider goes onto the race track. So
cleanliness of the idle jets and passages is critical for easy starting
and warm up and good throttle response.

The average rider actually tends to ride his machine only about 5000
miles a year, keeps the machine about 4 years, and sells it.

The newbie rider is the natural prey of the greedy mechanic in the
$tealer$hip who make$ his living by pre$cribing unece$$ary carburetor
$ynchronizing.

If the carburetors are dirty going into the $hop, and the mechanic
tweak$ the $crews that $ynchronize the carb$ to get the engine to run
$moothly, the rider will go for a ride and the alcohol additives
normally in new gasoline will clean out the jets and passages and the
carbs will be out of synch again because the $hop weinie tweaked with
the $crews.

From: The Older Gentleman on 13 Aug 2006 15:00
<markymark7560(a)sbcglobal.net> wrote:

> I agree with FB...Mark

Splendid. That's what made your democracy great.


--
Trophy 1200 750SS CB400F CD250 Z650
GAGARPHOF#30 GHPOTHUF#1 BOTAFOT#60 ANORAK#06 YTC#3
BOF#30 WUSS#5 The bells, the bells.....
From: PETE on 13 Aug 2006 17:02
Yeah I understood that.. I was just being a little sarcastic to the guy that
didn't like your helpful hints. He must own a dealership.
I've worked on my own bikes and cars for 35 yrs. I still appreciate help
every now and then.

http://webpages.charter.net/kgolden/maverick.htm


Pete

"FB" <flying_booger(a)yahoo.com> wrote in message
news:1155488252.469436.30530(a)74g2000cwt.googlegroups.com...
>
> Kent wrote:
>> I tryed your chemtool B-12 today in my 90 CBR1000 (on topic?) and it
>> worked
>> great!
>
> It isn't *my* B-12. I don't distill it in a shed in the woods, I don't
> drink it, I don't sniff it,
> but I use it on a regular basis to keep my carburetors working as they
> were intended to work.
>
> The EPA clean air requirements call for very lean idle mixture to pass
> the HC tests.
>
> The ubiquitous constant vacuum carburetor runs on its idle jets about
> 95% of the time, unless the rider goes onto the race track. So
> cleanliness of the idle jets and passages is critical for easy starting
> and warm up and good throttle response.
>
> The average rider actually tends to ride his machine only about 5000
> miles a year, keeps the machine about 4 years, and sells it.
>
> The newbie rider is the natural prey of the greedy mechanic in the
> $tealer$hip who make$ his living by pre$cribing unece$$ary carburetor
> $ynchronizing.
>
> If the carburetors are dirty going into the $hop, and the mechanic
> tweak$ the $crews that $ynchronize the carb$ to get the engine to run
> $moothly, the rider will go for a ride and the alcohol additives
> normally in new gasoline will clean out the jets and passages and the
> carbs will be out of synch again because the $hop weinie tweaked with
> the $crews.
>


From: kylentz on 16 Aug 2006 20:43
Thanks to everyone that posted useful advice and tips.

I've tried the Berryman's B12 with no effect. I thought it ran a little
rough at first, but I'm not sure. I had also tried Seafoam carb cleaner
in a previous tank of fuel.

I've cleaned the carbs twice, very thoroughly. Off the bike, all
disasembled. All new pilot and main jets were installed. Soaked the body
overnight in parts cleaner. Blew compressed air through all the passages.
I even used an ultrasonic electric toothbrush to clean all the parts. They
almost look like new inside. Because of this, I doubt a blocked idle
mixture circuit. The carbs are very clean. I used the OEM Yamaha manual
when replacing the jets, so I don't think I have them reversed.

I tried the, go 45MPH, put it is first gear, and pop the clutch
suggestion also.

I don't think it is a battery, because my battery is new and I've been
keeping it charged. Usually leave my charger on while cranking it and
trying to get it started. It's only a 6 amp, but helps. Granted, I've been
doing a lot of cranking, but I charge it up after working on the bike.

I did notice that once it is good and hot (like after a 40 mile ride) it
will idle pretty high, around 1300 - 1400 RPM. The idle screw only takes it
down so far, then seems to have no effect.

In response to the mixture screw posting - I am a newbie but not an idiot.
I could learn to set the idle mixture screws but the screws on my carbs are
at their original settings and still sealed with the red silicone. I would
prefer to get it running stock as is.

Could the symptoms be caused by float levels off? I don't think so, but it
is one thing I have not checked. Two of the fload drain screws are stripped
and I can't get them out. Any suggestions for getting the stripped screws
out?

Otherwise, I'm still looking for suggestions to the original problem - won't
start when cold (sits overnight). Otherwise it runs pretty well and will
start OK, even after sitting for an hour or two.

Also does anyone know what size the main air jet and pilot air jet should
be? I'm also wondering if mine have been changed at some time. My OEM
service manual doesn't state the air jet sizes, just the fuel jet sizes. My
air jets are 205's and 50's.

In regards to the poster that suggested measuring the voltage off the coil,
is that accurate? I've heard of checking the resistance (OEM manual has
specs for resistance), but the voltage would be very high, correct?

Thanks again for everyone that posting meaningful advice.
From: EffJay R. Yamaha on 16 Aug 2006 21:01
kylentz(a)excite.com wrote:
>
> ... I even used an ultrasonic electric toothbrush to clean all
> the parts.

I don't believe that there's any such thing. If you're talking about
Sonicare, they don't have anything more to do with ultrasound than an
ordinary toothbrush does. _Sonic_, not ultrasonic. That means they make
sound.


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