XXX

[moesterman]

Has anyone heard any more in regard to the problems with the xxx carb? I have e-mailed XXX several times about all the popping and snaping especially during decel, however, they never have gotten back to me. I have the chrome carb and it has never run right since it was installed. I had it dynoed twice by two different people who both had different ideas on how to fix it. If I had my stock carb I would put it back on.

 

[PROFLYER]

Mine just needed a good tune, they were hard to get a hold of when it came to my core refund as well. I think the recent split may have put too much weight on the last man standing's shoulders...what were their ideas to fix it??

 

[moesterman]

Just a difference in jetting. When I had it in Sturgis they leaned it way out which made it worse. When I returned home they fattened it back up and it did help but still not right. Some time back I read a thread about a known problem they were working on but haven't heard anything since. I don't recall any specifics other then fuel leaking by something and overloading during decel. They, xxx, were sending a new part and only chaging shipping. I just can't get them to return my message.

 

[Vegas]

I agree....getting an intermediate jet right on one of these is not rocket science. If it runs like crap it's probably way off and more than likely a carb problem especially with two dyno tunes when they have sniffers.

 

[Gas Man]

What pipes are you running?

 

[Oscar Maldonado]

I installed mine on my bike but have yet to fire it up. Waiting on my new grips and pegs and don't have the old ones to try it out.:loony: :bang:

 

[moesterman]

Gas....BR

 

[Raywood]

Lots of info here on this subject but one thing you can do it give us a little more info.

You state you have BR pipes. Ok, with or without baffles?
What air cleaner are you running and what find of filter.
Have you ruled out exhaust and intake leaks?
What jets are you currently running in the carb?
Where is your accelerator pump set at?
Are you over using the enricher when you start the bike?

Give us this info and maybe we can point you in the right direction.

Good luck,
Ray

 

[moesterman]

You state you have BR pipes. Ok, with or without baffles?
Stock BR

What air cleaner are you running and what find of filter.
DM Spike "I know" but it was not a problem with the stock carb

Have you ruled out exhaust and intake leaks?
Yup

What jets are you currently running in the carb?
I'm not sure what I ended up with this last time. I can say it was determined by a dyno run.

Where is your accelerator pump set at?
Left it alone after the last dyno run

Are you over using the enricher when you start the bike?
Don't use it at all

Give us this info and maybe we can point you in the right direction.
Tough to help those who can't help themselves.

 

[Chopper Dave]

Is your spike vertical or horizontal? remember.....the xXx carb flows more than the stock ones...so if your spike ran good on your stock set up......it will have to be tuned in for your xXx set-up..

 

[Raywood]

You state you have BR pipes. Ok, with or without baffles?
Stock BR

What air cleaner are you running and what find of filter.
DM Spike "I know" but it was not a problem with the stock carb

Have you ruled out exhaust and intake leaks?
Yup

What jets are you currently running in the carb?
I'm not sure what I ended up with this last time. I can say it was determined by a dyno run.

Where is your accelerator pump set at?
Left it alone after the last dyno run

Are you over using the enricher when you start the bike?
Don't use it at all

Give us this info and maybe we can point you in the right direction.
Tough to help those who can't help themselves.

Well conditions change so first off I would check out that accelerator pump that has been known to cause some problems. I would verify where it is set.
Screw it in until it just touches the pump arm. Then leave it off and go for a ride and see if you still have issues.
If not then you can adjust it out to where you want it. Mine's at about 1 - 1 1/2 turn out.
Next check you jets and see what you have. Just cause it was dyno tuned doesn't mean some operator had any S&S experience. If they are used to doing rice burners or HD's then they most likely don't know much about our S&S's.
The stock jets the come with your BR's are a 31/76. We can go from there depending on what part of the country you live in.
And the D&M aircleaner.......... No comment..........

We can go from here.

 

[Gas Man]

This seems to be the glitch to everybody. My BR's and XXX use to do that too!

 

[moesterman]

Thanks all. At this point I will have to wait until the weather breaks, about May, until I can get serious about it. I just remember reading that XXX had a known problem with what I believe was the accelerator pump leaking and over loading the cylinder during decel, thus the popping. I thought if I had a faulty carb now would be the time to change it and have it tuned this spring. Has any one else read a thread identifying a known problem and fix? I believe it came from XXX. They just won't answer my e-mails. In any case, Gas, what did you do to resolve our problem with this combination?

 

[Raywood]

The last problem was with the accelerator pump and it turned out that it was opened up toooo far. It was allowing to much fuel in that was puddling up in the carb throat. Fix was to turn it in shutting off the pump.
That's why I asked you to go turn it in and find out how many turns you get. Only take a minute for you run down to the garage and check it out!
Sometimes just from vibration it can back itself out due to a weak spring that doesn't provide enough resistance. Mine is loctited in.

Later,
Ray

 

[moesterman]

Thanks again Ray,

I will check it out, did you say about 1 1/2 turns is the norm? I do remember reading a thread about it leaking and they were offering a fix but I do not remember the details. I believe it was on the "other" forum. When you say shuting it off is a fix, do you mean fix, or just a means of trouble shooting the problem.

 

[Vegas]

The accelerator pump adjustment effects how long a stroke the diaphram makes, controlling the size of the squirt. The leak you are talking about was a problem with the o ring sealing the accelerator pump shaft to the venturi of the carb. That was causing pooling in the venturi. If you are getting decel popping you won't fix it. If it runs like shit on acceleration it needs fixed.

 

[moesterman]

Sooooo Vegas,

When you say "won't fix it"does that mean I have a terminal problem? Is it a combination of the mods I have made or just the result of the carb or pipes. All I have changed (on the 117) are the pipes, carb, cam and aircleaner.

 

[narow37]

I may be completely wrong on this but since the XXX flows a lot more air and the Spike cleaners are notorious for starving engines of are could your air/fuel ratio mixture be off. Am I thinking right maybe guys.

 

[Vegas]

Sooooo Vegas,

When you say "won't fix it"does that mean I have a terminal problem? Is it a combination of the mods I have made or just the result of the carb or pipes. All I have changed (on the 117) are the pipes, carb, cam and aircleaner.

Decel popping is normal. However you should not be experiencing any drivability problems such as hesitation, coughing, etc.

 

[lee]

pipes, carb, cam and air cleaner are pretty much all you can change that will affect carb tuning - I think the accelerator pump's function is for when snapping open the throttle and for when you move from inter to main - a quick test you could do is when idling, in neutral, snap open the throttle - if you get black smoke the accelerator pump screw is likely to be too far out - as the boys say though you will almost definitely not be able to get rid of decel popping with those pipes - I have them on my Harley which is fuel injected and they pop on decel - it s also a good idea when tuning you rintermediate jet to have the accelerator screw shut off completely as it can disguise the symptoms you are looking out for when tuning that jet