CO screw adjustment question.

[Qwodracer]

Cleaned all the rubber manifold boots, Soaked them all in Rubber renue. Cleaned the TBs, cleaned the intake plastic piece.

reassembled everything.
new clamps from EME
new bosch fuel psi regulator (because i had it apart anyways)
new fuel lines
new vacuum line for the psi regulator
synced TBs, and yes now one is NOT reading higher than the others. they are synced at 6inches

then adjusted the co screw, but cannot get the rpm to raise, it just stays the same, and the more out I adjust it the rpm starts to drop when i push the start button (like 8 turns) but idle stays the same from about 4.5-8 turns

took the bike for a ride and the problem still exists (tried 7 turns and 5.5 turns), just not as bad as it was. certainly the vacuum leak was affecting it.

[Laitch]

If you live near an AutoZone or NAPA, you should be able to borrow an exhaust gas analyzer at no charge.
What type of fuel injectors did you use as replacements?
From where are you getting your lean-drop instructions? Try these if you haven't yet. Rebalance the throttle bodies with the CO screw 1.5 out at the beginning. Remember the CO screw setting at the highest attainable idle. If it doesn't get any higher past 1.5, 1.5 is it.

[rbm]

What type of fuel injectors did you use as replacements?

+1  That would be my question too.  What was wrong with the original injectors that prompted you to replace them? You seem to have symptoms of a rich mixture.  If you replaced the OEM injectors with 4-hole high performance Ebay ones, that might account for the overfueling and fouled plugs. 

[Qwodracer]

I did get 4 hole injectors from Amazon. I had a leaky o ring on one injector and that caused a mini fire and melted a good part of 1 injector. So I figured I should buy new ones. Are the 4 hole bad? I still have the stock ones, I could probably swap the caps but I don’t trust the body of the one that got melted. Or is the problem not the 4 holes, but the overall flow ?

(I put 4 hole injectors in my Volvo and bmw and Supra and never had a problem, but they were all rated the same cc as the single hole.)

[Qwodracer]

If you live near an AutoZone or NAPA, you should be able to borrow an exhaust gas analyzer at no charge.
What type of fuel injectors did you use as replacements?
From where are you getting your lean-drop instructions? Try these if you haven't yet. Rebalance the throttle bodies with the CO screw 1.5 out at the beginning. Remember the CO screw setting at the highest attainable idle. If it doesn't get any higher past 1.5, 1.5 is it.

Hmm at 1.5turns my idle is only 650-700rpm. I’m at about 2.25 turns to get ~1000 rpm

[Laitch]

Stop at the best attainable without exploring the outer galaxies then try following those instructions.

[The Mighty Gryphon]

Four hole injectors?  I'm looking for 16 hole injectors.  Can you imagine the power to the rear wheel with those suckers?!  I'd try 32 hole injectors, but I don't think the clutch and transmission could handle the power.

[volador]

Four hole injectors?  I'm looking for 16 hole injectors.  Can you imagine the power to the rear wheel with those suckers?!  I'd try 32 hole injectors, but I don't think the clutch and transmission could handle the power.

stick with the OEM you can't handle the power... 

[volador]

OP maybe you buy 4-Hole injectors from same seller as this dude "So! I am furious at these 4 hole injectors"

[Qwodracer]

OP maybe you buy 4-Hole injectors from same seller as this dude "So! I am furious at these 4 hole injectors"

Hmm interesting topic. Mine are orange. Not like color matters 😂 150cc/min should be 150cc/minute despite how many holes it has.

Looks like I spent 70$ on the three… oh well, maybe I just need to grab one oe to replace the burnt one.

[Laitch]

150cc/min should be 150cc/minute despite how many holes it has.

Indisputable; however, accuracy of specifications and depth of quality control are what can drive purchase cost when one product actually delivers according to its claims and another doesn't. Maybe your replacement injectors are just dandy but those of some other purchasers have been creating fury. 

[rbm]

OP maybe you buy 4-Hole injectors from same seller as this dude "So! I am furious at these 4 hole injectors"

I helped this member to get his bike working again.  The symptoms it exhibited were the same as the OP's - limited revs, poor idle, bogging down when twisting the throttle.  We checked everything related to spark, fuel delivery and air.  Symptoms eventually pointed to the injectors.  We replaced all three with the OEM ones he had and instantly the problems went away.  The quality of the 4-hole injectors is suspicious and leads to different experiences by different people, but generally I don't think they deliver.  Best to stick to the OEM injectors or very goos after market ones such as from tills.de

[Qwodracer]

Back again. Wanted to report my latest findings.

Bike essentially stopped driving in September which was fine, I just put it away for the winter. Couple weeks ago weather got nice so I started tinkering again. Mind you in September my truck lost its fuel pump (1 year old) and over this winter the gas station I use, was torn down and completely overhauled, new tanks and pumps. So no surprise  that when removed the fuel pump, the screen was completely discolored pink, collapsed inward. And I found ethanol sands in the bottom of the tank. Despite cleaning the tank last year before posting all the problems.

So after much cleaning with dawn and muriatic acid and new pump screen and fuel filters the bike finally runs amazing, and that is with my orange top 4hole 150cc injectors (I even grabbed a second set because they were 25$ now instead of 75$) lol

Thanks for all the suggestions over the years. I am starting to think the Gas station that advertised “non ethanol 91octane” had a leak or contamination all along, I’ve been using it since I moved here 5 years again and went through a total of 3 fuel pumps in my truck, and many many fuel filters. I now have a pack of coffe filters in the bike box to put over the nozzle at the gas station 😂

[Laitch]

Thanks for all the suggestions over the years. I am starting to think the Gas station that advertised “non ethanol 91octane” had a leak or contamination all along, I’ve been using it since I moved here 5 years again and went through a total of 3 fuel pumps in my truck, and many many fuel filters.

To be fair, the station wasn't advertising "non-contaminated gas" though, was it?    Thanks for posting this cautionary tale, Qwod; it makes me wonder just how long some of this non-ethanol gas sits around waiting for Brick owners to drop in and buy three or four gallons of it. 

[frankenduck]

I now have a pack of coffee filters in the bike box to put over the nozzle at the gas station 😂

Won't do much. Most gas station pumps have a 10 micron filter and a coffee filter is not finer than that.

[The Mighty Gryphon]

Actually, non-ethanol gas has a pretty long shelf life, it's the E10 stuff that goes bad in 6-7 months.  I worked for a while in a boatyard where one of my jobs was cutting up old wooden cabin cruisers that had been abandoned, sometimes for as long as 20 years. 

One of the perks was that I had to pump the old gas out of the tanks before I started cutting.  I would pump out 50 or 60 gallons of 10-15 year old unleaded gas that I pumped into barrels where I let the water settle out.  I ran my car for the entire summer on that old gas and never had a problem.

[Laitch]

I would pump out 50 or 60 gallons of 10-15 year old unleaded gas that I pumped into barrels where I let the water settle out.  I ran my car for the entire summer on that old gas and never had a problem.

So that's how boutique gasoline is made!

[The Mighty Gryphon]

Sunoco '92, aged in monel, it was a very good year.

[frankenduck]

I use ethanol in my Bunsen burner.  Works great for cooking up batches of high-grade meth.

[Laitch]

I use ethanol in my Bunsen burner.  Works great for cooking up batches of high-grade meth.

You must be the star of your neighborhood's bake sales!

[daveson]

Did I hear somebody say meth?
D-fHRDIUYAEdjD5.jpg (36.52 kB . 576x576 - viewed 478 times)

[frankenduck]

You must be the star of your neighborhood's bake sales!

With help from the local Hell's Angels chapter, our PTA grossed $500K last year from "bake sales."