Thread: Carb Settings
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Old 20-06-2013, 11:40 PM   #1
JordyRoo
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Join Date: Feb 2012
Location: Telford, Shropshire
Age: 34
Posts: 8,866
Bike: CR250 & KLX195
Carb Settings

Right since this thread is needed ill start it off, everyone who knows the baseline settings for their carb & engine just post in this thread. Eventually itll build up into a nice database.

Do a plug chop between each adjustment, ride the bike through the gears at full throttle, pull the clutch in & kill the engine then roll to a stop, take the plug out. If its white you need a bigger main, if its black & wet you need a smaller main. You're looking for a nice coffee colour. (however dark isnt too bad - running slightly rich is better than running lean)

** Genuine Mikuni 24mm **

- CRF50 with 88 kit, head ported & polished - 4J13 needle, 120 main, stock pilot, needle clip 2nd from top, mixture 1 turn out.

** Molkt 26/28mm **

- YX140 with Z40 - Straight out the box, 2nd clip from the bottom, mixture 1 & half turns out.

** OKO/KOSO 28mm **

- YX125 - 95 main & 35 pilot, JFN needle on middle clip

** OKO/KOSO 30mm **

- YX140 with Z40 - 110 main & 42 pilot, needle 2nd from bottom, mixture 1 & 1/4 turns out.

- YX184 - JFJ needle, 110 main & 40 pilot, needle middle clip & mixture 1 turn out.

** Genuine Keihin PE 28mm (4stroke) **


- Z155 - 115 main, 38 pilot, needle clip 2nd from top & mixture 1 & 3/4 turns out

- 150 - 200cc / tuned up smaller engines - 115 to 130 mains & 38 to 42 pilots.

** Genuine Mikuni VM26 **

- YX140 - 0-0 needle jet, 135 main & 30 pilot, needle clip 2nd from bottom

- YX140 - 0-0 needle jet, 4J13 needle, 150 main & 27.5 pilot, needle clip in middle
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