Idle Too High

"Dear Ralph" October 28, 1997 0
Dear Ralph: Why would my ’96 XLT have an unusually high idle speed? A high idle is usually caused by a lean condition. Most...

Dear Ralph:

Why would my ’96 XLT have an unusually high idle speed?

A high idle is usually caused by a lean condition. Most people remedy this by turning in the air screws a bit (1/4 turn more) which enriches the idle mixture, but this varies from machine to machine. You should first synchronize the carbs ( See the “How To” on this in this issue), and then adjust the idle screws if necessary. How do you know if your carbs are out of sync ? As the sled is idling, quickly blip the choke and the idle RPM will go down. If the idle speed stays down you then need to turn in the air screw. If the idle RPM goes down and then slowly rises you need to sync the carbs.

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