95 600 stalls under load

[allofus007]

Couldn't find a thread on this so if there is one point me to it please. Had carb issues. After getting beat up by members (I Was stubborn.) I soaked the carbs. Bench synced. Checked for vac leaks. Fresh oil. Idles great. Revs fine at a stand still. Put it in gear and try to accelerate and it bogs and dies. I do hear what sounds like lifter rap. When I rev up I see black smoke. I can see its running rich. A/for screws 1.75 out. Any ideas or re soak carb. I'll be checking floats tonight.

[arsenic]

With the A/F screws at 1.75 turns out, there is no way in hell it's rich. They should be at 2.5 turns out.

[allofus007]

The smoke could be from improper float settings though right? And could that be the culprit of the stalling. I'll adjust the screws when I pull the carbs.

[arsenic]

Yeah, float heights need to be set correctly. Check that and report back. Have you synced the carbs yet upon reinstall?

[allofus007]

Same problem. Idles and revs fine . Try to ride it bogs and stall then is difficult to keep running. Thinking of parting out

[shpielers]

It's just running rich, don't give up hope. Something isn't sealing properly. Sounds like you checked float height again, did you replace the orings on them when you cleaned/rebuilt? Did you make sure where the float needle seats is super clean?

Black smoke = gas
Blue smoke = oil
White = water.

Ergo black = running rich.

[arsenic]

It's just running rich, don't give up hope. Something isn't sealing properly. Sounds like you checked float height again, did you replace the orings on them when you cleaned/rebuilt? Did you make sure where the float needle seats is super clean?

Black smoke = gas
Blue smoke = oil
White = water.

Ergo black = running rich.

It's not rich because of the A/F screws, I can guarantee that.

[shpielers]

It's not rich because of the A/F screws, I can guarantee that.

Lol yep! Specifically mentioned sealing there for a reason

[Kreylyn]

I'd suggest a weak spark/arcing issue.


Almost every time I've had a bike idle/rev fine, but it's weak going up the hill of a drive way I have, it's been related to a arc from one or more plugs to the engine.


Krey

[Purplehaze]

With Krey on this one. Expereinced a same loss of power under load due to coil and plug related issues. That being said run through the carbs for sure and insure everything is top-notch.

[allofus007]

update...compression bad in cylinder 2

Odd thing was it would build.build.build. then nothing . Nothing. Then build again..valve issue? Would bad shims cause it?

[92xjunker]

No, pull the tank start the bike in the dark and check for plug wire arcing. Also check your power to the coils, should be 11v minimum

[allofus007]

I will check the coils no problem. Cylinder 2 has 110 psi compression. 1-165...3-175....4-170...28 psi allowed for difference. 114psi minimum to run...I already checked for arcing btw

[shpielers]

I'd recommend doing a leak down test to see what the issue on #2 is. Dunno if it's related at all, but it will be an issue.

[allofus007]

The valve cover is off and I can hear it hissing from cylinder 2 every time it comes around. Was hoping for easy fix as I got laid off and it is looking like I may have to sell it. Big difference between running and drivable