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Old July 11th, 2012, 09:45 PM   #40
lc86
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Name: Samual
Location: Utah
Join Date: Dec 2011

Motorcycle(s): 2010 Ninja 250r (RIP)

Posts: 258
Quote:
This one is hard because of the carb swap. Do we know why the guy/gal was selling the second set you bought? Were they a member here?

Overall though it sounds as if the bike is running poorly on the bottom part of the rpm range. To me this still screams jetting and/or pilot screw settings. Do we know if the carbs you bought were jetted or shimmed?
The carbs should work fine, they were off my 2010 Ninja and only had ~600 miles on them before I swapped them for EFI. I had done nothing to them except uninstall them (I.E. no shimming or jetting). It ran perfectly fine before I took them out and they weren't sitting for very long before I shipped them.

If you feel like playing with the Jetting/Shimming of the needles, I do have a spare Dynojet stage 2 kit, this will let you remove the snorkel or upgrade to a k/n setup, probably make your bike much better.
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