NOW I THINK I SCREWED THINGS UP - pilots !!!

[FLATSIX]

Hello everybody,

I did the adjustment of my pilotscrews today with the digital "cheap" CO-meter.

At 2.75 turns out I had more then 5% CO - at 1.75 turns out I obtained 1,7-1,8% co -, finally at 2.25 I obtained the 3% CO I wanted.

Then I adjusted them all 6 to 3% - I only had to make minor changes to the 2.25 out (1/4" max.)- first I took note of the changements, but with the fan that came several times on and had to stop each time, I lost the number of turns.

Anyway : all are at 3,0 % + did at the same time the synchronisation to be sure they were also at the same vacuum.

I should be happy now, but there is an important thing that really borrows me : when I raise the rpm from 900 till 2500 rpm, then before the adjustments the CO dropped.

NOW WHEN I HAVE 3% CO AT 900 RPM AND I RAISE IT TILL 2500RPM (I keep it there till CO stabilises) THEN I OBTAIN 4 % - instead of dropping my CO gets higher !!!!!!!!!!

When I go till 3500 rpm the CO is still 3% !!!

I must say that I turned the pilots several times completely in - wit the tool it is not easy to feel if they are seated (completely in) - did I screw up the pilots ? or why does the CO-% does not drop as before adjustments- what can I do to let the combustion become normal : higher rpm's = almost no CO ??

I should never have touched those screw anyway.........................but too late!

[RP#62]

Can't answer your question, but if you put an electric fan in front of your bike blowing back towards the engine, you radiator fan won't kick on.  I do this while doing my carb syncing.
-RP

[Ricky-D]

To me, that doesn't seem like much change at all and you're fine at idle both co2 and synchronization.

I'd suggest riding it for a while and see how it runs.

Like my momma always used to say: "If it isn't one thing, it's another"

Regardless if the pilot screws messed up the seats, using the meter will sort it out and that's all that matters!

Give yourself a break and see how it is.

***

[FLATSIX]

I did work on my bike too long - I was measuring for hours - till I finally got all 6 good.

Before that the CO went down when I bliept my throttle - now CO climbs when I do that.

What are the consequenses or symptoms when the seats of the pilotscrews are dammaged?

Has anyone experienced damaged pilots and what did the bike?

[FLATSIX]

Things I learned :

-it is indeed possible to adjust the pilots by using a CO-meter with digital display - my pilots are now set to give 3,0% CO individually - when first all 6 screws are turned out an equal 2,25 turns then you are already good for 95%.

-The "fine-adjustment" is turning in some max. 1/4 turn to reach exactly the 3,0 CO -I had a few with 3,2 and 3,4 CO that I had to turn in till 3,0 was reached.

-The exhaust gases will probably mix inside the tube, but you are still able to make changements till each individual piggie gives a reading of 3,0, before with all set at an equal 2.25 turns you have readings like:  1 side =  3,0 - 3,1 - 3,4 (that was the right side).

The difference : POSITIF :- my lady pulls a little harder , has a different sound when accelerating (more prompt sound)
                                     - exhaust is not "stincky" anymore

                        NEGATIF: -without use of choke = hard to let run, with choke no problem, after short time I close choke and it idles- before it ran without choke, but then it was adjusted far too rich.


IT IS LIKE ROBERT SAID : WHEN YOU TURN ALL 6 PILOTS 2.25 TURNS OUT THEN YOU ARE FINE, and he is right! Of course with fine-tuning it is a little more accurate, but you won't feel it much!

[Dag]

HERE IS THE CARBURETOR ADJUSTMENT PROCEDURE THAT FOLLOWED MY BLANKE SERIE #2500 CO METER
Idle Adjustment Procedure
• At idle, adjust the idle mixture screw(s) until CO in the exhaust pipe is between 2-4%.
• If CO cannot be set above 2%, increase the slow/pilot jet(s) one size.
• If CO cannot be set below 4%, decrease the slow/pilot jet(s) one size.
• With CO between 2-4%, using a tachometer, adjust the idle mixture screw(s) until idle RPM reaches a maximum
(around 3.0% CO).
• Adjust the idle speed screw so idle RPM is at the factory specs.
• Record the CO level at idle RPM.
Cruise Check
• While in neutral, accelerate to mid range (1/3 of maximum RPM) and hold for 20-30 seconds until CO stabilizes.
• At this RPM, CO should be 1/4 to 1/2 of the CO at idle.
• If CO is less than 1/4 of the idle results, the engine is too lean. Install a larger slow/pilot jet(s) or raise the
needle(s) one step.
• If CO is more than 1/2 of the idle CO, the engine is too rich. Install a smaller slow/pilot jet(s) or lower the
needle(s) one step.

[FLATSIX]

Thanks Dag.

Finally I had all 6 at 3,0% CO.

The day after I checked with hot motor and the right exhaust was way off. Adjusted again and again till O.K.

But then the idle was not good + start with cold engine was hard.

Today I turned all 6 pilots back in and 2.25 turns out like Patrick advised (should have listened to him) - idling good - only now when I open throttle till 2500 rpm the CO does not drop but climbs +1%

Before my pilotscrew-turning when I opened throttle the CO went to 1/2 or less of what it had at idle.

I only touched the pilotscrews + synchronisation :  so I think that I screwed up my pilotscrews by dammaging their head ??

Why is CO going higher by opening throttle to 2500 - 300 rpm?