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Richer or leaner? (a little lengthy)

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:ride:I have an 08 KX 100. It is producing tons of splooge, mainly where the pipe connects to the front of the engine, no drip out the silencer but it seems pretty saturated in there.

Mods: FMF fatty, shorty pro circuit silencer, Boyesen reeds.

If I open the carb will it say what number Main jet and pilot jet is in there? Like on the actual jet?

I have a chart I found on funny junk that gives jetting specs for the kx 100.

If its running rich (assumping its at factory specs) If I change to:

138 Main

Clip 2 from top

42 Pilot

This is what is recommended for 70F 0 elevation for my bike. Would this be a happy medium for 50 degree in the morning and 90 during the day?

Going from 133 main to 138 main is leaner correct?

Edited by ctotilas
Oh, and I will be repacking my silencer before I make an changes.

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I can't answer all your questions, but larger jet is richer, not leaner.

And , yes, the jet number is stanped on the jet.

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Thank you for answering what you could! Would anyone else like to add to this?

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i have a kx 100 and it idles and has great mid range but top end breaks up terrible . Is it the main and is it lean ? please help

Edited by Tim 54

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There is no reason to change jetting for a problem that has developed over time.

Jetting does not fix maintenence problems.

 

If it ever ran properly with the jetting you have, then jetting is not the issue.

 

Probably time for a top end, and a cleaning.

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Before going crazy with the jetting first try replacing the o ring on the pipe where it enters the exhaust port and see how things go.

Spooge is NOT a sign of bad jetting !

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