starting to get cold feet.

[Larrym]

What the BLIP Do I Know???

Rickrod3,

As long as the bank is off the bike and you're having some "Quality Time" with those BS 34's then you might consider doing a bench/BLIP test.

PROM Quote: "Carbs up-side-down... "Blip" the floats to clear the air from the lines... dry up the spilt fuel that came out... and then watch."

For further enlightenment:

http://www.xs11.com/forum/showthread...highlight=blip

BTW page two has pics of the inverted blip test and the right-side-up "overflow" test...

[Rickrod3]

Thanks LarryM

I'll read up on the carb bench testing and hopefully pull the carbs this weekend.

Rick

[kirmit77]

Time and frustration....

Keep up the work Rod. I know it can be stressful with the carbs and everything. I found out while doing my boss's xs that his needles were broken after cleaning them 10 times and bringing them to a rally where a fellow xser told me about it.

Carbs are a PAIN.

thats why im doing fuel injection

[Rickrod3]

Carbs are a PAIN.

Yea but: There is a lot of good people with experience encouragement and advise so it makes it bearable.

The big payoff is when we finally get them going and your riding around on something that you had in pieces all over your garage and work bench. It is pretty gratifying.

Thanks Austin

[kirmit77]

Yea but: There is a lot of good people with experience encouragement and advise so it makes it bearable.

The big payoff is when we finally get them going and your riding around on something that you had in pieces all over your garage and work bench. It is pretty gratifying.

Thanks Austin

Trust me, I KNOW! I Touched EVERYTHING on my bike and its just great to be able to ride. If it wasnt for RPGOERLICH and his sync, I would have probably pushed this thing off a bridge!(no cliffs down here)

[Rickrod3]

Happy New Year

Well I rebuilt the petcocks and tried the bike again same result.
(bike starts right up but will only run on full choke.)
I let the bike run a little longer it did not help.
I did notice that the #3 cylinder does in fact start and runs lean. (header pipe blue) so I know it is lean.

So far I checked all 4 needle tips they were fine.
I'll go over the carb cleaning tips, and go through the carbs again.
If any one knows of anything I should pay extra attention to; please let me know.

I think may be too soon to be blaming jet sizes but; can anyone tell me if they can Id these pipes? i'd like to know anyway.

http://s910.photobucket.com/albums/a...2.jpg&newest=1

I put back the stock jets cause thats what the ones that were installed looked like.

Thanks in advance
Rick

[XSokieSPECIAL]

You can go here http://parts.yamaha-motor.com/topnav.aspx?ls=sport and enter your year and model and get an exploded view of your carb.

I believe what you are showing in the pic is the main nozzle. The jet needle moves up and down inside it to control fuel flow under open throttle conditions.

I am including a link to Mikuni Motorcycle Carburetor Theory 101 http://www.iwt.com.au/mikunicarb.htm to help you understand how these CV carbs work.

It helped me a lot.

Hope this helps.

[Larrym]

"The Carbs Of Our Lives..."

Rickrod3,

I was so hoping that this time you'd report back that the bike ran with such sound and fury that you were actually a little scared. Drat!! It's more than just that we're all pulling for you here, your ride looks like the first XS I ever owned. I guess that makes me a little more "invested" in the outcome than most.....

I don't know about those pipes. Sorry. I would say that you've got significantly less backpressure than the stock setup and therefore might end up making some different adjustments/jetting in order to compensate. But for now...back to the carbs, ok??

I interpret that #3 is running lean even with the "enrichment" system on. That would seem to indicate that there's still something wonky in that part of the #3 carb.

1.) Look in the bottom of the float bowl where the metal pipe from the enrichment system goes into the float bowl: that hole in the float bowl has to be clear. Spray some carb cleaner into that small orifice in the float bowl. Be sure to have it pointed away from your face. DAMHIK

2.) I don't know if you broke the bank of carbs apart from the angle iron which holds them together. If you didn't then now would be the time to carefully separate carbs #3 and #4 from the rack: they're connected together by a fuel tee and a carb vent tee. Keep them together in order to not have to mess with the Tees. You would have to slide the enrichment rod as well so do this with the carb rack inside some container: otherwise you might lose the small ball and spring which might/might not be located in carb #4. No need to pull the rod all the way out unless you're going "whole hog" and separating all the carbs from the rack.

The Idea is to pull the enrichment plunger out of #3 carb and examine it. Also at this point you can spray carb cleaner into the input/outputs of the ports of the carb body without risking damage to the "rubber" parts of that plunger: forwards and backwards to ensure it's clean. From that pipe which comes up from the float bowl and from the side where it exits into the intake side of the carb butterfly.

Reassemble, install on your ride, and test. If it still runs lean on #3 then the problem is likely somewhere other than the enrichment system.

Looking forward to the next "cliff hanger" you post.

[Rickrod3]

I won't let you down

I was so hoping that this time you'd report back that the bike ran with such sound and fury that you were actually a little scared. Drat!! It's more than just that we're all pulling for you here, your ride looks like the first XS I ever owned. I guess that makes me a little more "invested" in the outcome than most.....

Hey Larry:
79 was a year I remember fondly. I graduated High school and was zipping around NYC. on an expansion chambered RD400F. People that know this question my sanity.
I still cannot figure out why

Work and the holidays have been monopolizing my time.
I'm getting a to hell with everything feeling first things first.
Yeah right
Going to get back on it asap.
Its great to have the moral support

Rick


.

[Rickrod3]

Got the bike to Idle

went through the carbs once more.
I set the the #3 carb float height the same as the others for some reason it was a little over 25MM. and the others were at 24mm.

seemed to cure the lean #3.
After a good warm up (about 10 mins outside air temp 25 Fahrenheit )the bike was Idling with out the choke.

I did not notice any thing obvious but these passage ways are small.
What seemed to work good for me for testing the slow circuit was removing the pilot jet inserting the carb cleaner straw with a bushing made of electrical tape into the opening and pressing the button on the can.

With the mixture screws in and set at 1-1/2 turns.
The carb cleaner comes out of the bypass and the 3 pinholes and the air jet with enough force for me to be comfortable that the slow circuit is clear.

I believe my next step is syncing.
I have questions on the sync tool in the tips section which I'll post on another thread.

Ta Ta for now
Rick