Pilot screw adjustment discrepency - KawiForums - Kawasaki Motorcycle Forums
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post #1 of 21 (permalink) Old 04-26-2007, 12:17 PM Thread Starter
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Pilot screw adjustment discrepency

I've been reading here and everywhere that Kawi recommends three turns out on the pilot screw adjustment but the general consensus is around 2 1/2 turns is better. I have mine adjusted out to 2 1/2 but it's still not running right...seems to run lean just off idle but smells rich.....dunno.
Anyway, I was just browsing my shop manual on cd for the 98-99 G model and in the carb specs it recommends 1 turn out. Is this what it should be for he G model??
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post #2 of 21 (permalink) Old 04-26-2007, 03:57 PM
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After the bike is warmed up...and idling around 1000 rpm...gentley blip the gas...if rpm drops first, then its too rich.
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post #3 of 21 (permalink) Old 04-26-2007, 07:32 PM
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if they needed to be leaned out how much do you recommend turning in at a time?, also do they all need to be at the same turns in/out across all four carbs?
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post #4 of 21 (permalink) Old 04-26-2007, 08:22 PM
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1/2 turn adjustment at a time. yes...all 4 the same.
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post #5 of 21 (permalink) Old 04-27-2007, 02:22 AM Thread Starter
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Well I adjusted them to 1-1/2 turn out and as I suspected, it doesn't want to hold it's idle......too lean.
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post #6 of 21 (permalink) Old 04-27-2007, 02:37 AM
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every once in awhile mine back fires when first starting it. could adjusting this screw change that
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post #7 of 21 (permalink) Old 04-27-2007, 03:12 AM
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You might have an air leak, or the sync may be too far out of whack...I should have mentioned that earlier....an out of sync bike will dip and hang. Here's a clip from FactoryPro...this goes into a better detail...i just remember the hang/lean and dip/rich relationships:

>>>>>>>>>>>>>>>>>>>>>

With the carbs synched, the engine warmed up to operating temperature, and the idle speed set, adjust the fuel screws so that when you rev the bike in neutral and release the throttle, the revs quickly drop to exactly idle speed again. If, when you release the throttle, the revs hang up a few hundred rpm above idle speed, then drop to idle, the idle mixture is probably a bit too lean. Turn the fuel screws out. Use a minimum of half turn increments until you know you've just about nailed it. You'll drive yourself up the wall trying to tune the thing in eighth or quarter turn increments if you're a mile off. In extremely lean cases the idle will hunt between the proper speed and something above it. If, when you release the throttle, the revs drop below idle speed then pick up, the idle mixture is probably a little bit too rich. Turn the fuel screws in. In extremely rich cases the engine will die after revving the bike and releasing the throttle, unless you've turned the idle speed screw way in, in which case it may act like the idle mixture is a little bit too lean. In slightly rich cases, the engine will respond well to throttle blips when cold, but will die or dip slightly below idle speed when hot.
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post #8 of 21 (permalink) Old 04-27-2007, 12:27 PM Thread Starter
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Excellent post jbreit. When I took it for a ride afterwards, the revs were hanging before dropping after I released the throttle.....defintely lean. Following the Factory Pro advice will make tuning it alot easier.
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post #9 of 21 (permalink) Old 05-17-2010, 03:13 PM
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sorry if this sounds stupid but where are the air fuel screw and the pilot screw...alll i see is the synch screw
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post #10 of 21 (permalink) Old 05-17-2010, 03:19 PM
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Quote:
Originally Posted by jersy19 View Post
sorry if this sounds stupid but where are the air fuel screw and the pilot screw...alll i see is the synch screw

Underneath the little brass caps by the float bowls. You have to drill or pry the caps out.

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