i bought 1 from ebay, the only problem is i am not sure how it works. can any one enlighten me on this matter.

t.y.

hf240z@yahoo.com

first of all, i'll recommend buying the ztherapy tuning video.

As far as using the unisyn- you have a round disc, with an adjustable wheel in the center, and a "tube with a ball" attatched.

The idea is to hold the disc over the carb, (remove air cleaner first) and the little ball will "float" from the vacuum.

It is important to hold the unisyn on the carbs only a little while to get a reading, leaving it too long will give an inaccurate measure. Use the wheel to adjust the air flow so that the floaty ball is centered within its tube. you then go to the other carb to check they are drawing at the same rate.

Make very small changes in idle/mixture to adjust. You can also "hear" the balance when the engine is accelrated- put your head down between the carbs and rev the motor- you'll hear the vacuum raise the carb piston & can tell if they go in synch.

Hope that helps, don't know how much or little you need to know..try www.ztherapy.com and for Kyle's directions:

http://www.sonic.net/~kyle/ztech.html

Good luck, JA

The idea of the unisyn is to ballance the draw of air so that they are drawing the same . With the engine warmed completly , turn the idle adjustment out untill it no longer is in contact with the linkage. now the ballance screws need to be adjusted down untill the engine will run at about 1500 rpm . with that accomplished take the uni-syn and with the air cleaner cover removed place the face of the unisyn over intake of the carb and turn the adjustment center of the device untill the little ball in the tube is floating in the area of center , now place the device over the other intake , if the ball floats in the same place in the tube then they are ballanced. If one carb is drawing more ane the ball floats higher then they are out of ballance and you need to either increase ,or turn in the ballance screw, of one carb or decrease , back out the screw, to ballance them. As you get them ballanced the rpm will increase and the engine will run smoother. when ballanced then you need to adjust the mixture . E-mail me if you need help with that.