Plug chopping with out success

Ihave been trying to plug chop my 750 but it seems I cant get it to run rich I know its lean because the plug is clean I gut tells me I am going to have to tear carbs down again but be fore I do I wante dto see if there are other thoughts that should be checked

 

what rpm's are you running and that is kinda correct if you are above 4500 or so and up then it is in the needle taper, and main jet things you can't adjust externally. You can shim the needle up if needed and or bump up the main jets a size. Give us some info do you have pods, K&N filter, aftermarket or mod exhaust all or any of these can cause lean conditions, as ewll as dirty carbs.

 

If the Plugs are clean after the Chop ... this means you aren't getting Pilot Fuel coming-up from the Pilot Jet.

Either the Jet or the Passages are blocked.
I'd Pull the Pilot Jet and the Pilot Mixture Screw and flush-out the passage.

You need a Rubber Ear Syringe from a Drug Store.
Spray Carb Cleaner in a clean glass to get a large quantity of it.
Fill the syringe.
Insert the syringe into the Pilot Jet Mount with the Jet removed.
Push the cleaner through the passage.

It should exit through the Pilot AIR Jet and the Pilot Mixture Housing.
Once you KNOW the Jet and the Passages are clean and clear ... retry the Plug Chop because Fuel should be getting to the top side after a clean and flush.

 

I need to go back and reread your chop thread I an getting confused

 

The Plug Chop is a method of "Fine-tuning"
After you have the Bike running.
After the Idle is good and steady.

The Optimum Performance you will get from your Bike is done via Plug Chop.

You can do it all in one sitting or across several outings.
I have done both.

But, to be successful the Carbs need to be cleaned and functioning perfectly.
The Plug Chop is a read on the way the Mixture is being burned by observing the Plugs.
Each Plug has a story to tell about how its Cylinder is being fed.

The process is one of making a minute adjustment to each Pilot Mixture Screw needing to be adjusted resulting from the read on the Plug.

My last Chop on the 900 was done after running the bike "Normally" for three days.
The Plugs were very light and the Bike "Felt" like it was being held-back.
A read of the Plugs indicated that each was still a bit lean. One leaner than the three others.

Individual adjustments to the Carbs had me add Richness to all four with an additional bit to the one too lean for its own good.

Now, the Bike is running real well.
Is this the end of the tuning.
No!
I'll ride the bike for a day or two and observe them again.
Once I get the coloration to be light brown, I'll be satisified.
I know, from checking the read ... they're still on the lean side ... but, NOT critically lean as to cause an overheat or other damage resulting from being too lean.

I'm in the Zone of great performance.
All I'm really doing now is playing with my bike.
It's fun to do after getting dialed-in. You tweak in search of perfection.

Another tweak or two ought to do the trick.

 

Rick I am understanding the theory of plug chopping its application having difficulty with So let me start from the beginning its 750 seca 1000 miles pods and pipes jetted 124 main and 41 pilot. Bike is running very strong but Ifear it is running lean seems awfully hot with the bike idling at 1050 or so pilot screws seem to have no affect on the plug read or at any other rpm above idle if i go go sub idle it richens up not ure what diection to go

 

I'm reluctant to give advice on tuning when the bike has Pod Filters on it and un-restricted exhaust. No matter what advice you give ... there's a better chance of it being wrong than right.

You have Pods.
The Carbs were not designed to work with Pods.
They were designed to work with the combined Cubic Feet per Minute of air allowed through a central Airbox.
Shared air.
Not unrestricted air. The unrestricted air means you are running lean.
Lean enough to require re-jetting the Carbs.
Particularly, the Pilot Jets.

I don't know what size to Up-to for your bike.
I only know that you are going to be too Lean without upping the Pilot Jets.
It's now wonder you are having such a bad time trying to tune the bike.

I'd appeal to those who have had some success at tuning for Pods and aftermarket exhausts.
Some people have found a formula that works enough to get the bike running well enough for their tastes.

I wish there was something as simple as telling you to get a so-'n-so set of Jets and a hotter set of Mains.
Every bike is different, though and as soon as the airbox gets replaced for Pods the fun begins.

You seen to have found The Twilight Zone.
You are captive to the suggestions of others who may or may not know what is best for you.
They will offer advice and schemes that might or might not help.

I won't lie to you and tell you I know what to do.
When if comes to tuning a bike with Pods and custom exhaust packages ...
I don't know what to tell you to do.

My telling you I don't know is the best advice to give you rather than giving you something to try ... only to have it not be the solution and further frustrate you when you tried and it didn't work.

The Carbs are designed to share the total Intake through the airbox Inlet.
Pods increase that CFM exponentially.

If Pods did anything to improve performance; I'd have them on my bike.
I keep my air filter clean and vacuum out the airbox twice a year when I do a big cleaning.

 

With my tuned ZX9R (High flow airfilter, open exhaust) i've got the problem with temperature differences...

In winter the bike runs way leaner than in summer time. (cold air keeps more oxygen than warmer air, cold air is more "compressed" than warmer air) Therefore an idea came up to get a lambda-sensor build it into the collector of the exhaust and led-bar on a place where you can read it.

That way you are able to monitor the richness of the mixture at any given moment....

There are plenty schemes on the web which tell how to build it...

I never came that far cause the kawa broke-down before i got to get a lambda sensor....

This will help to tune the bike without using a dynobank...

 

Rick I understand your reluctance to give advice on this matter and respect it. but you gave me the direction I was looking for I never expected A set of magic jet #'s I realize task ahead will be difficult I just got lost for a little bit. So thank for your patients and understanding

 

I know its tough.
I don't go there because I'm too old to be bending over and pulling the Carbs to exchange Jets ans see if there is any improvement or not.

I guess if this WAS me ... I'd put an aftermarket Jet Kit in it.
Probably a K&N Stage 3 Kit:

Intended for motorcycles with stock or mildly tuned engines using a well designed aftermarket pipe and individual air filters. In most cases power increases of 10-15% can be achieved. However driveability may be compromised particularly with short stroke, high rpm motors. On some modern engine and airbox designs, individual filters and proper jetting offer no performance improvement yet compromise driveability, in such cases stage 3 kits are not available.

See how K&N word the Pods problem.
"Offer NO Improvement"

I wish there was something I could do to help you.
I just know that if I even get thinking about this ... I won't sleep nights!

I'll be up playing cards and getting stoned with Rod Serling.
I don't mind being in The Twilight Zone ... I just want to get there under my own terms!

 

Rick you have done plenty the rest is up to me (and chacal for jets) dont know anything about stage three things seems to me chacal has all the jet sizes i need btw this will probaly kill you to know the pipies and pods were done for cosmetic purpose only any power increase doent really matter just like the look more over stock that and I like to play with engines. This is really no different than drag racing cars they change there jets between passes be it is aloy easier on a carb with quick change jets . Maybe I will write a book when I get it tuned right

 

Well, ... Good Luck!

I really like your attitude.
I hope you find a combination of Jetting that gives you whet you are looking for.

I like the "Look" of an engine with Pod Filters, too. I've just been around the block a few times trying to get one smoothed out withodut the success that the owner was looking for ... so, rather than keep knocking my head against the wall ... I just stopped.

Not without trying a few tricks ... but, there was always something not right.

My theory is AIR Jetting and the Holes in the Emulsion tube.
A larger Air Jet
Graduated I-D's for the Emulsion Tube to pull more fuel.

 

interesting theory appartently you have been giving some thought to this over the years