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post #1 of 12 (permalink) Old 7-15-2019, 5:05 PM Thread Starter
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Random high idle.

I have a 2000 500. It wasn’t running when I got because it sat for over 5 years. After flushing out all old fluids, a carb and petcock rebuild I got it running again. The only problem I’m having is the bike wants idle high after it warms up. I have base idle set at 1300. Bike seems to run just fine going down the road, but when I come to a stop it wants to stay at 3500, sometimes. I had it idling at 1300 when I got back from a ride today and it just went up to 3500 while I was opening the garage door. Any feedback or a good starting point would be appreciated. Thanks.
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post #2 of 12 (permalink) Old 7-15-2019, 5:19 PM
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Try adjusting pilot screws 0.25 turns out from current position.
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post #3 of 12 (permalink) Old 7-15-2019, 5:23 PM
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Check for air leaks at the carb boots.

2006 Ninja500R Purchased new July 2006; 0 miles. Miles as of January 2019; 102,137. It's a GO bike, not a SHOW bike.
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post #4 of 12 (permalink) Old 7-15-2019, 5:25 PM Thread Starter
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Thanks I will. I had them set to 2 1/4 turns out on each. It seemed to be running rich so I backed them down to 1 1/2 each. Seemed to help. But not with the idle problem.
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post #5 of 12 (permalink) Old 7-15-2019, 5:26 PM Thread Starter
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I thought about leaking intake boots as well. I need to inspect them thoroughly. They are a little deformed.
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post #6 of 12 (permalink) Old 7-15-2019, 5:28 PM
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Quote:
Originally Posted by Eroc02 View Post
I thought about leaking intake boots as well. I need to inspect them thoroughly. They are a little deformed.
If you blip the throttle, is the bike a little slow to respond, and do the revs hang for a while before coming back to normal idle speed?

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post #7 of 12 (permalink) Old 7-15-2019, 5:28 PM Thread Starter
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Thanks for the help guys. Your time is appreciated.
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post #8 of 12 (permalink) Old 7-15-2019, 5:30 PM Thread Starter
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The bike is not slow to respond to the throttle. But is does take a bit for it to come back to normal idle.
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post #9 of 12 (permalink) Old 7-15-2019, 5:31 PM
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Quote:
Originally Posted by Eroc02 View Post
They are a little deformed.
Odds on the intake leak just went up. Are the clamps in good shape? Either way, looks like you should check it for leaks.

2006 Ninja500R Purchased new July 2006; 0 miles. Miles as of January 2019; 102,137. It's a GO bike, not a SHOW bike.
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post #10 of 12 (permalink) Old 7-15-2019, 5:35 PM
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While you're poking around in there, make sure the enrichener valves are fully closed. They are an air bleed with a rich mixture.

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post #11 of 12 (permalink) Old 7-15-2019, 5:43 PM Thread Starter
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I will look closely at both of those areas. Thank again all.
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post #12 of 12 (permalink) Old 7-15-2019, 6:34 PM
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Quote:
Originally Posted by Eroc02 View Post
Thanks I will. I had them set to 2 1/4 turns out on each. It seemed to be running rich so I backed them down to 1 1/2 each. Seemed to help. But not with the idle problem.
There may be a couple of separate internal or external carb issues at play.

Provided your circuits are *truly* clean...2 1/4 should be in the ballpark, not rich. I'd surmise unmetered fuel sneaking in somewhere.

Additionally...the idle hang justifies an obvious carb pull and review, inspection of individual carb subsystem functions. Could be as simple as dirty slide surfaces? Throttle plates/shafts/springs allowing quick, unimpeded return from open position...aggressively "snapping back"? A throttle cable with insufficient free play?

I'd keep anything and everything on the table, until eliminated.

“Being shot out of a cannon will always be better than being squeezed out of a tube. That is why God made fast motorcycles, Bubba....” quote Hunter S Thompson

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