TRX250R.ORG

Workshop => Carburetor, Intake, and Exhaust => Topic started by: PNWrider on May 24, 2014, 10:58:20 AM

Title: Keihn needle question
Post by: PNWrider on May 24, 2014, 10:58:20 AM

Which part of the keihn needle jet has the greatest effect?

I would assume it would go in order of the letters; diameter, length, taper

But could someone verify this for me

Thanks

Title: Keihn needle question
Post by: PNWrider on May 24, 2014, 06:16:46 PM

Effect meaning which would lean or richen or lean it the most

Title: Keihn needle question
Post by: Jerry Hall on May 24, 2014, 06:55:08 PM

Every letter is VERY important.  Having any letter wrong on the needle can cause the engine to run rich or lean at the throttle position that the needle is controlling the fuel flow.  You can have the right pilot and main jet and still foul a spark plug or burn the exhaust side of the piston off if one of the letters is wrong for your engine set up.