What size pilot jets do you guys run?

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mwoj
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What size pilot jets do you guys run?

Post by mwoj »

I'm just wondering if anyone runs any extreme pilot jets on their bike? I have an 85 kdx200, and bought pilot variants from 10-110. 35-40 = pilot= not running. So just curious what other pilots other people use. Anyone ever tried a 100? Or 10? The extremes of the extrememes?
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C George
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What size pilot jets do you guys run?

Post by C George »

our H models came with 48's , I believe we have 42's in there ,,, BUT every bike needs it's own custom jetting !!
05 KDX-220R / 06 KDX-225R / Maxima 927 / Millenium Tech / Ron Black / PC , FMF / Many 220 engine mods / 40 + yrs. of riding dirt bikes 🤟🤟
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KDXohio
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Re: What size pilot jets do you guys run?

Post by KDXohio »

I run the right one :lol:

I think I'm atrying a 45 right now in my 90

35-40 sounds pretty lean but I don't know what that model came with
1990 KDX200 FMF Fatty, Answer VFC silencer, VForce 3 Cage, Wiseco Piston, KX125-J series KYB USD fork conversion, Race tech goldvalves, J series front brake assembly, air-box snorkel removed, Acerbis Headlight, KX450F Front fender, Pro Taper RM bend bars, ASV front Brake lever, MSR Clutch perch and lever, RB Head mod, 36mm PWK carb, Trail Tech Kickstand.
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Julien D
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Re: What size pilot jets do you guys run?

Post by Julien D »

Yeah there would be no sense just trying the extremes. Both will be way out of range of what the engine needs.
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KDXGarage
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Re: What size pilot jets do you guys run?

Post by KDXGarage »

In stock configuration, the bike had a 40 in it.

It's a 32 year old bike. It may be a combination of issues.
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mwoj
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Re: What size pilot jets do you guys run?

Post by mwoj »

haha yeah. you are 100% correct about alot of issues. il keep messing with it tho. Thanks for your guys input.
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Re: What size pilot jets do you guys run?

Post by mwoj »

Well....ran pretty good with a 100 pilot. Running a little rich so I'l prolly go down to a 90. Would have never guessed it would be that far from stock.
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KDXohio
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Re: What size pilot jets do you guys run?

Post by KDXohio »

Compensating for another issue I'd be checking the intake tract for air leaks and your crank seals compression? That's over double stock something has to be wrong there....
1990 KDX200 FMF Fatty, Answer VFC silencer, VForce 3 Cage, Wiseco Piston, KX125-J series KYB USD fork conversion, Race tech goldvalves, J series front brake assembly, air-box snorkel removed, Acerbis Headlight, KX450F Front fender, Pro Taper RM bend bars, ASV front Brake lever, MSR Clutch perch and lever, RB Head mod, 36mm PWK carb, Trail Tech Kickstand.
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Re: What size pilot jets do you guys run?

Post by KDXGarage »

Yes, you have an issue somewhere else if you think it is running well there. Re re re clean the 32 year old carb.
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