Author Topic: Pilot jets  (Read 132 times)

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Offline jelbon

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Pilot jets
« on: November 10, 2019, 11:48:41 pm »
In the process of resurrecting a crashed 2002 c10.
Stripped the carbs down to clean and check them over. One slider was slightly sticky.
I had to drill out the pilot plugs to get at the pilot jets, which I thought was only a California or European thing (Canadian bike).
But what I found interesting was the amount of turns to zero the jets. 1/8, 3/4, 1/8 and 1 1/4.
Why the vast difference? 
Had lots of carbs apart previously and found that they were usually close.

Offline GeorgeRYoung

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Re: Pilot jets
« Reply #1 on: Yesterday at 01:17:52 am »
Mine were all over the map, too.
Factory settings 0, 7/8, 1 1/3, and 1/4 turns CCW from lightly seated.

I set them all to 1.5 turns out, worked fine.

Offline connie_rider

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Re: Pilot jets
« Reply #2 on: Yesterday at 01:51:07 am »
For clarity; You are  talking about the pilot screw, not the pilot jett.
When drilling thru the cap to reach it, many touch the screw with the drill bit, and turn it in...
Is there any chance you touched the pilot screw with the drill bit?

But I agree, stock; the adjustment's you find are all over the place.

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Offline Lee

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Re: Pilot jets
« Reply #3 on: Yesterday at 03:45:54 am »
Anyone know the factory criteria or procedure for setting on assembly line?

Offline GeorgeRYoung

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Re: Pilot jets
« Reply #4 on: Yesterday at 01:21:39 pm »
Anyone know the factory criteria or procedure for setting on assembly line?
Turn them in until the engine pops on deceleration. ;)

Offline cra-z1000

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Re: Pilot jets
« Reply #5 on: Yesterday at 02:02:57 pm »
I believe they are set up on a flow bench .
1987 C 10
80 Kawasaki KZ 1000 MK 2
74 Honda 750 four ss
73 Suzuki 550 triple
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Offline jelbon

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Re: Pilot jets
« Reply #6 on: Yesterday at 03:58:56 pm »
"Is there any chance you touched the pilot screw with the drill bit?"
No, I was very aware of that while drilling.
Interesting to see that others had the same experience.
Currently I have reset them to the same settings, left the plugs off and may adjust them if needed later.

Offline cra-z1000

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Re: Pilot jets
« Reply #7 on: Yesterday at 04:17:02 pm »
I recently went through mine and set them all to 1-3/4 out . Running better than ever .
1987 C 10
80 Kawasaki KZ 1000 MK 2
74 Honda 750 four ss
73 Suzuki 550 triple
72 Honda 550 four

Offline Lee

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Re: Pilot jets
« Reply #8 on: Today at 02:21:51 am »
If the factory used a flow bench would there really be such a wide range of turns between carbs? Curious.