2003 Xt600e carb sync help

[Selltech88]

After lots of looking I couldn't find a good post about syncing the carbs on my 2003. It was sitting for awhile when I was in the USA so now it has been popping back through the carb. Also the quality of gas here in the Dominican Republic isn't the greatest so I feel a good scrub would do wonders. Which brings me to the next thing. My first time ever syncing carbs. Here in the DR there isn't a good Yamaha shop near by and I also do all of my own wrenching. I want to make sure I know step by step how to sync before I start rooting around in something I wasn't prepared for, living in a land where XT parts are more of a unicorn.. (Been wrenching for over 11 years and my first carb sync scares me. Haha) Any links, tips, tricks, hacks or Grey hairs of wisdom are welcome. Even a point to the tread I missed where this was already discusted.

[Jens Eskildsen]

Theres not much to sync.

The slide on the primary carb should open 6mm before the secondary carbs open. Insert a 6mm drill into the primary carb, and adjust the screw between the 2 carbs to meet spec.

[THUMPTHUMPTHUMP]

carbs should reach full open at the same time or one will prevent the other from opening all the way. I adjust them to reach full throttle at the same time, and the secondary carb delay is what it is. THUMPTHUMP

[jjrider]

The secondary is vacuum operated , can't be set at wide open because it doesn't move with the other one. It gets set by when it can start to open (when vacuum can move it. It's done as Jens said.

[Mezo]

Originally Posted by jjrider

It's done as Jens said.

Yep, that’s how i did mine.

Mezo.

[THUMPTHUMPTHUMP]

jj talking about the linkage for the butterfly dude. That is what you sink. The cable pulls the linkage for the primary carb, then after a 1/4 throttle or so the adjustable screw picks up the cam/ linkage for the butterfly in the carb to open allowing air to be pulled through the secondary carb that creates the vacume to lift the slide . The cam/ linkage on the primary and secondary carbs have different ratios so that the secondary can open the butterfly later but still open to max the same time the primary reaches full throttle .THUMPTHUMP