[Axelhere123]

Originally Posted by jcgss77

Welcome to the forum!

What work did you do prior to riding it-meaning did you service it at all, or just start running it after purchase? I would personally replace the air filter, pull the carbs, break them down by removing the top and bottom end of them, soak them overnight in the gallon container of Berryman's Chem-Dip (get this at an auto parts store), clean them up after bathing with a can or two of carb cleaner spray, do the same with the jets and carb bowls, and clean up all the parts you see there. DEFINITELY change the oil and filter, K&N filter can be easily bought at Advance Auto, typically it is in stock and on the shelf.

NOTE-On the '08 the needles and jets are carb-side specific, so definitely do not mix them up, the bike will run worse if you don't pay good attention.

If you have not already, be sure to read this link for DIY if you do your own work: https://www.ninjette.org/forums/showthread.php?t=5586

EDIT-Also read this link, even if the carb info is from the older 250's, the carbs are very much the same except for some small differences. The ideas and techniques will be identical though- https://faq.ninja250.org/wiki/Ninja250_Howto

Thanks for the reply!
Did an oil and oil filter change. Now I have 2 more problems the air box appears to have gas in it and the battery has died.. not sure what’s going on but it all seems to be falling apart I’m going to get a carb rebuild kit today hopefully that helps.