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Pilot Screws

  • Thread starter Thread starter martyman
  • Start date Start date
M

martyman

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I've read the instructions for Balancing my 1983 GS550 carbs and the way its explained it never mentions touching the Pilot screws. The manual says that the Pilot screws are PRE-SET 1 5/8 turns out. The manual pretty much says that you are adjusting the butterflies to balance at 1750...Is it that simple that the Pilot screws never get touched and the balancing is done with the throttle balance screw?


Have two hoses, mentioned above,connected to the , R and L adapters. Run the engine at steady 1750 and ,under this running condition, see if the two steel balls stay equally at the center level line, as they should, to signify that the two carbs R and L are balanced. If not loosen the LOCK NUT AND TURN THE THROTTLE VALVE SETTING in the Left carb to bring the ball to the center level line
Click to expand...
 
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The pilot screws control low speed mixture, which has nothing to do with sync. You might want to set the screws as called for in the manual and then adjust the sync. After you are done, tweak the pilot screws a little until you get the highest possible idle. When adjusting the pilot screws try to keep track and adjust all the carbs more or less the same.

Good luck.
 
Just did my '85 GS550 a few weeks ago (same carbs). As Nessism stated adjust the pilot screws to get the highest idle and then synch the carbs with the one screw. It is that simple.
 
Thank you..I was confused mainly because its a dual carb and they give you 4 pilot screws to adjust but there is only two vacuum vents...I will try what you guys said :D
 
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