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Old January 16th, 2015, 08:15 AM   #1
Mr_ek9
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After jetting bike idles low?

Ok,so it rejetted my 08 250r for the first time with the FP jet kit with the 112 mains and the Raise the needle 3 clips. Is it normal for it to idle around 900-1000 rpm when slightly warmed up? Or do I just need to adjust the idle screws?
Mods are jardine gp1 full exhaust, k&n 0990, clean air removal with block off plate?
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Old January 17th, 2015, 10:21 AM   #2
Motofool
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Quote:
Originally Posted by Mr_ek9 View Post
Ok,so it rejetted my 08 250r for the first time with the FP jet kit with the 112 mains and the Raise the needle 3 clips. Is it normal for it to idle around 900-1000 rpm when slightly warmed up? Or do I just need to adjust the idle screws?
Mods are jardine gp1 full exhaust, k&n 0990, clean air removal with block off plate?
Welcome, Kaivi !!!

Try these first:
http://faq.ninja250.org/wiki/What_is...I_adjust_it%3F

http://faq.ninja250.org/wiki/How_do_...dle_mixture%3F

http://faq.ninja250.org/wiki/How_do_...carburetors%3F

http://faq.ninja250.org/wiki/How_to_...e_your_jetting
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Old January 17th, 2015, 02:18 PM   #3
Ghostt
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I would recommend tuning the idle screws first, start at 3 turns out, then tune from there.

Warm it up, turn 1 side pilot screw in until the rpms drop, then back out till RPM's peak (and no further)* Twist throttle...see how it reacts...tweak to taste.
Repeat on other side... test ride. You're looking for best throttle response and transition from just cracked to 1/4 throttle opening or so.*

Thats a quickie, 10 cent tutorial on setting pilot screws.**

Also carburetor tuning is a patient and slow process, start out small, then work your up.
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