YICS Tool Rental?

Supposedly, the tool with the "O" rings has very little durability, but I guess would work, since they are doubled up in the pic. If they broke, they would still isolate pretty well.

 

Thanks bro! 8)
Curious what the "actual" YICS tool is/was. Read thru
a couple threads where it's talked about leavin' the tool
in permanently. 8O Guess I just haven't clicked on the
theory..?

 

That's the one I have. I've only syncd twice but it worked fine both times. I'm sure at some point the rubber washers might need to be replaced, but who knows how long that'll be.

 

NO, it's not. That's the "leave it in place" type "YICS eliminator" tool; the correct style factory copy has a release lever at one end and a nice big fat SEAL right by the lever where it meets the outside of the passage.

 

I've got Chacal's tool, so if anyone in the Kitchener, Stratford, Woodstock area wants to borrow it, they're more than welcome, just come pick it up.

 

xj511 i bought one of them, i dont know y they use rubber o rings? is it for vibration, my mate has just made me 2 up, and they work great,as my 550, wont start on the button,without it, and carbs are set up right, but i do have open filters,

 

I have both. I didn't care for the eliminator. I think the o-rings are spaced to prevent the fuel in the port from mixing whereas the washers on the yics tool expand to block off the four holes in the top and seal the open end of the port. I could be wrong. Hope this helps.

Gary H.

 

psssst.....hey-----shhhh, don't tell anybody.....you don't really need to use the YICS tool.

 

Is some-one on this list living near Eindhoven (The Netherlands, Europe) and willing to rent or let me borrow the tools needed to tune my XJ 550?
I am looking for a YICS tool, a vaccuum measurement tool and a colotune plug for 12 mm plugs.
The rental arrangement from Chacal does not work for me because of the shipping time and cost.

Thanks,
Joris

 

I read an articel where you can bench sync the carbs using wire or tiny drillbits to measure and match the throttle plate opening.

at least i have a use for my used socks now

 

That's called a "bench sync" and used to get them roughly adjusted before you mount the carbs. Since the vacuum will most likely differ from cylinder to cylinder, you need to do the final adjustments on the bike running.

 

Seriously? I was about to post a thread asking this.
I'm going to be checking my valve clearances and cleaning/syncing my carbs for the first time
soon and was wondering if i had to use that tool even after balancing them with the homemade bottle sync
machine if you will.
It's a 1982 xj650 seca I have with the YICS pasted all over it!

 

Ummm......if the YICS passages (not the large chamber that the tool fits into, but the tiny passages that run off the chamber and to each intake tract) are completely blocked by carbon build-up, then that's probably true. And then it's also probably true that you should un-block them......

It is physically impossible to correctly synch a YICS-equipped engine, with un-clogged ports, w/o the YICS tool in place (or, at least, SOME way of blocking off the YICS chamber), so that the cylinders do not communicate (and share vacuum signals) with each other during the synch process)!

 

I have one of the tools, bit have never needed to use it, and the passages are very clean. I like to look at the tool. its pretty.

 

A lot of mechanics don't vac synch following the bench synch (i do). Imo the best way to bench synch is to use the holes in the top of each carb. A good bench synch should put the vac on each carb within 1" or less of each other which is within spec and will allow the bike to start and run less the ec (aka choke). Using a yics tool and vac gauge(s) will put them spot on.

Gary H.

 

It really is, a work of art even.......

 

We're not talking about the running sync gauges. We're talking about the YICS tool that would be inserted into the YICS port to block the carbs from each other while you do your running sync. I do use gauges, I LOVE the Morgan Carbtune. It takes only a couple minutes or so to dial them right in.

At our carb clinics, he look on the faces of people... after they take their bike for a spin....is priceless when they pull back in.

Dave

 

Yes, until you get:

a) your valves adjusted
b) your carbs cleaned
c) your mixture screws adjusted (Colortune Plug)
d) your engine synched (Carbtune synch gauge)

you'll have no idea just how powerful and balanced and reliable these engines are.

Of course, doing all the above means you'll have to spend the time and $$ to make up for the last 30+ years of previous owners NOT doing such regular maintenance/service, but, if you really want to dance, ya got to pay the fiddler........

 

And THAT is a lot of why there re carb clinics.

You're absolutely right ..... When these bikes are back in shape, they really have p l e n t y of power!!

Dave