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Mikuni Carburator throttle synchronization2005 Deep Snow Snowmobiles

Mikuni style carburetors are synchronized at wide open throttle without the engine running. The MAG side carburetor is the adjusting carburetor, the PTO side carburetor have a non-adjustable set screw on the throttle shaft.
This carburetor is what the other carburetor is synchronized to and is considered the base carburetor.

1. Remove the air box.
2. Remove the tops on both carburetors.
3. On the base carburetor hold the throttle at wide open throttle and view the position of the carburetor slides. The slides should be flush with the top of the carburetor intake area.
   
4. If they are not flush with the top, hold the base carburetor throttle wide open and turn the slide stop screw until slide is flush with the top.
   
5. On the other carburetor, loosen the Phillips head screw inside the offset nut.
   
6. When screw is loose, hold throttle to wide open. Turn offset nut clockwise to raise or counterclockwise to lower,until throttle slide is in same position as base carburetor.
   
7. Tighten phillips head screw.
8. Replace top caps.

Updated on: Saturday, January 16, 2021