Plugging the YICS to sync the carbs.

[KA1J]

I have a YICS plugging tool which fits my 82 XJ650 Maxim but was informed it will not fit the XJ11. On the XJ650 there are bolts at each end of the YICS port but on the XJ11 there is only one bolt.

What is the suggested way to clean the YICS port on the XJ11 and what is the best way to temporarily plug the port to sync?

Thanks,

Gary

[DGXSER]

Hey Kaj,

WE have a member here that designed and sells a great tool for the YICS system, he termed it the "YICS Eliminator Tool". Member Yahman...aka..Larry has info posted on the site, but I do not recall where that area is.

You can contact Larry through PM also. His tool is designed such that it can be left in place permanently, or used tmeporarily for tuning. Your choice.

[CatatonicBug]

Yep, the Eliminator is the way to go. No reason to remove it either. As for cleaning, a piece of coat hanger with a cloth on the end, wetted with a cleaner of some sort works great. Just be sure the cloth is securely attached to the coat hanger.

[KA1J]

Yep, the Eliminator is the way to go. No reason to remove it either. As for cleaning, a piece of coat hanger with a cloth on the end, wetted with a cleaner of some sort works great. Just be sure the cloth is securely attached to the coat hanger.

The suggestion of the eliminator got me looking at it & at least some of the pages dealing with it. I thought maybe there was somewhere on XS11 to order it from but not finding it I just a few minutes ago bought one from Larry on fleabay.

Those two bolts on each end of the YICS tube on the 650 make it easy to see any particles in there. Not so with the XJ11.

I'm willing to give a try about leaving the eliminator in there, I read that the YICS allowed the carbs to have smaller jets yet keep the same HP. If so perhaps this will have some benefit to a good carb balance considering I'm going to make a K&N filter material fit on the air filter and there's currently a 4-1 exhaust on it. Who knows, maybe it'll be a really nice modification.

Either way it'll make using the carbtune much less painless.

[DGXSER]

My understanding of the YICS issue was just one more way to try to achieve the emissions control requirements of the era. In concept, it evened out the draw and mixtures across the board by combining them so to speak.

The eliminator returns it to the setup of the XS series, one carb, one cylinder. Most of the XJ owners on here use an eliminator and leave it in there. Most have 4-1 exhaust, and most have had to come up with some air filter mod like your describing.

So you will be in good company with your plan.

[Cobia]

I bought and installed the YICS eliminator, best mod I ever did on my J.
I'm still using the original airbox and filter, and a 4X1 exhaust.
I was experiencing a little hesitation between 1.7k rpm and 2.5K rpm. I went up to a #50 pilot jet and it smoothed everything out.

[KA1J]

Hi DG,

Thanks for the reply. I only remember what I've heard on other discussions/forums about YICS. I remember one comment was when the vapors from the YICS port entered the cylinder, they entered at an angle to the incoming mixture from the carb and this caused a tornado/vortex pattern and provided better conditions for maximum combustion. That was supposed to have an end result of better fuel efficiency. Supposed is the operative word.

But I don't know if any of that really is a true effect, just what I read. It's good to keep an open mind when having the chance to try a different idea so I'm curious to see how this bike behaves with the eliminator. Probably the better trial would be to give it a run in my 650J as it runs in as new condition. If there was a change I'd be better likely to see it there as I just got the XJ11 late last month & haven't rebuilt the carbs or adjusted anything yet.

[soccer4m]

yics

THE Eliminator is the way to go, I am the guy who came up with the idea, but Yahman actually made the device. Anyway, buy one, leave it in and forget about it. Then you can synch whenever you want without putting one in and out. Also, it adds a smoothness to the engine running. I have had it in over two years and still runs great with the eliminator in. The smaller xs, xj engines are narrower and the YICS Eliminator is diff. sizes, but Yahman has built it for all the YICS engine sizes.............Mike in Sun DIego

[Yahman]

Hi everyone, Thanks for your support.

Last year I redesigned the YICS Eliminator to fit all of the bikes that have the YICS system. Yep, one size fits all!

In my signature you can find a link the YICS Eliminator here on the site.

Thanks,
Larry

[Yahman]

Cleaning out the YICS passage

If you have a gun cleaning kit, you can use a .40 S&W or a 10mm Auto caliber cleaning brush to scrub the YICS passage with.

Larry

[Poprock]

Mega dittos on leaving the Eliminator in. All the above happened to my bike once I installed it. The positive difference was immediate and dramatic.