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Old October 9th, 2019, 08:00 PM   #26
NewtoNinjettes
ninjette.org member
 
Name: Morgan
Location: New Orleans, LA
Join Date: Sep 2019

Motorcycle(s): 2007 250r

Posts: 19
Ok, found out that the clear hose is OEM and is an overflow for the carbs, I was suspect of it because it was clear and putting my finger over the end of it would cause the engine to stall even from 3k rpm.

I also remembered that it had no foam airfilter in the airbox since it disintegrated and a had cleaned it out. So I cut a regular yellow home depot clean up sponge in half with a bread knife and it fit perfect. At least perfect enough until the new oem foam one comes.in.
Surprisingly adding the foam makeshift airfilter added a couple hundred rpm instead of decreasing it. Which makes more sense now that I think about it since the air/fuel ratio is probably more accurate.
So lastly I adjusted the idle speed knob. Yep that pretty much took care of it lol. Idles perfectly now. One issue it has is a little lag time coming down from 2500rpm.to 1500 rpm but revs perfect in the rest of the range. I can live with that but does anyone have a clue how to tune that out?
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