I just posted this on a more specific motorcycle site, but I know there are a few bikers here, so I thought what the hey.
I have a 2004 Kawasaki Ninja 250.The bike idles great. But after sitting at an idle at a stop light, when I open the throttle, the bike often dies. In the intersection: EEEIIIAA! The various solutions I’ve heard of are: re-jet the carbs (I’d rather not do that yet), synchronize the carbs, adjust the valves, do something about the float level (I can’t remember what), clean out the slow (idle) jets that might be plugged, add half a bottle of Techron, add a K&N filter. I live at an altitude of 5200 ft.
I’d rather try the easier/cheaper fixes first, of course. Checking if the low speed jets are clogged makes sense. The guy in the front of the bike shop suggested I throw on a K&N filter and see if that doesn’t solve it, because the bike is probably running a little rich at this altitude and that would “lean it out.” This made sense to me, but when I talked to the guy back in the service dept. (a more conservative guy who I think is leery of anything that isn’t stock on a bike), he said no, “The Ninja has a &^%$ carburetor (can’t remember what he called it) that adjusts itself. This altitude shouldn’t affect it. A K&N filter will make it run too lean.” One thing that makes me distrust the service guy a little is that this problem seemed to get worse after he did the 1000 mile maintenance tune up. I’m not sure.
How would you guys, using a matrix of cost/ease/likelihood to be effective, prioritize these interventions? And is the service guy (who also criticized me for changing out my stock Dunlop tires for Sport Demons, which turned out to be a really good move) full of bull?
Okay, back to work. Thanks for any suggestions.