Who has made thier own carb synchro tool?

[Monsta]

I did and used transmission fluid. I think it is too thin as the fluid "bounces" around a lot.

Has anyone tried gear lube? I figure a 75 weight gear lube would be better than the water thin ATF I used. (I now clearly understand why Mercury is used in this application. ;) )

I have about 2-3 feet of hose between the fluid & the carb so I'm not really worried about it being sucked into the engine.

[rod]

Did you put restrictors in the tubes? If you put a bead in the tubes it will help the pulses and heavy oil works better. Rod

[endo]

I used tranny fluid, continuous loop 3/8 ID or so clear vinyl hose, then a coupler between the clear vinyl and vacuum hose of more appropriate diameter and less temperature sensitivity. I think the coupler helps buffer the pulses and while they are still visible, the gauge gets a very fine and sensitive adjustment in. If you toch the vinyl to anything hot it quickly melts.

This is simply a balancer between two cylinders, which works perfectly on my 1st Gen and my BMW. I compared with dial gauges of a friend's at a nearby shop, and it's right on the money.

[uthpda]

I have! Tried the tube method with tranny fluid...not fun!

I did alittle more looking and found instructions to make a home one with bottle.... check it out here...http://faq.ninja250.org/wiki/How_do_I_synchronize_the_carburetors%3F

It seems to work pretty well and much easier to mess with!

[Gearhead]

No, but I've heard heavy gear oil recommended. If you do get some sucked into the engine it won't hurt anything.

Jeremy

[endo]

Here's what mine look like front/back:

http://www.seawall.com/sync-front.jpghttp://www.seawall.com/sync-back.jpg

This example could use a little more fluid. It works just fine. The hoses loop through the backboard creating a reservoir loop in the back, then loop through the back again, with little clamps holding the hose in place at strategic points. Crude but effective.