XJ Carb Sync Question

I have an '82 XJ 550 Maxim and am ready to sync the carbs.

a) can the carbs be sync'd without using the YICS disable tool with good results?

b) Does anyone have plans to make a homemade Sync tool (manometer) ?

Thanks

 

If your engine is a YICS engine, you need the tool to synch properly - it will not work well without it.

I've put up the picture from the XJ CD on how to build one in my gallery here
YICS tool

 

Thanks for the info,

I was also looking for a plan to make a homemade vacuum guage manometer used during the carb sync process.

I saw some info on the web whereby one was made using clear plastic tubing and a yardstick, anyone have any experience with this?

Thanks

 

if you go to carbtune.com you will see a link to the right that says ...your bike...click on that and scrowl down to yamaha YICS by Bryan Edwards and he explains how to make one and the parts you need.

 

Thanks for the info,

I was also looking for plans to make a homemade vacuum gauge or sometimes called a manometer.

Anybody have experience with this?

 

Oh for the cost of a set of vacuum sticks, you might as well just buy one - it's worth it rather than building it and trying to calibrate it correctly.
Or if you'd like to spend some money for a good tool you can use for a long long time, get the Morgan CarbtuneII (those are roman numerals for 2) - excellent, no mercury, and well worth the price.

 

I made my own manometer using the designs found on this site. I used oil instead of water though. It worked fine - go ahead and build your own.

Rob

 

do you have the link on this site Rob???

 

Well worth your time to read the very long thread some time back on YICS. Very interesting, for directly opposite views on the matter.

I didn't use it, and have no problem at idle. Above idle, it doesn't matter anyway, as I understand it.

 

Since we synch the carbs one to another in pairs why screw around with open ended manometers? We should be able to synch by attaching 2 carbs to opposite ends of one manometer. The carbs would be synched when the levels match, no scale required.

This is my idea:


To be most sensitive it would need to be a light liquid, maybe alcohol. The whole thing could be made with a length of clear tubing. I think some sort of orifices right before the tube connects to the manifods would reduce fluctuation.

What do you guys think?

BTW. I could make one faster than I was able to draw in Photoshop! :wink:

 

Alcohol?

They better be synchronized better than you can possibly imagine BEFORE you hook-up a tube filled with alcohol ... or, the alcohol is going to disappear ... so fast ... you might not even have time to wave good-bye.

Poof divided by a minimum of three hundred cubed.

 

Look again. Connected to two intakes, unless way out of sync shouldn't pull through.

I'll grant you though, 1st time might be a good idea to use something nonflamable.