Well I got the basket case 250 Ninja I bought last week, put together and got it running. It starts up and idles perfectly but when I get it to 4000rpm it bogs a little and sputters up to 10,000rpm. I am going to go through the carburetors again. I must've missed an adjustment in them. The guy I bought the bike from said he bought these carbs on Ebay so they were not the original carbs on the bike. The jets and bowls were clean. I believe the idle circuit is intact, could be needles or CV diaphragms or a vacuum leak at high rpm. I got my work cut out for me. Getting the carbs off with that stupid airbox is a hassle. I think I will put a set of K&Ns on there and get rid of the airbox. Just need to figure out where I will put the battery.