I just got a 1998 Kawasaki ninja zx6 I changed the plugs and started to ride it for the first time. Well around 5-6k it studders and lacks power. When cruzing sometimes and go to jam on the throttle it also lacks power. I went home and pulled the plugs and found they were white running very lean. I decided maybe someone messed with the jetting and I went up from 135s to 142.5s and it still runs like crap. I cleaned the carbs up. Any ideas?

 

sync your carbs and make sure all the vac lines are right, also might think about replacing air filter if its dirtay

 

sync my carbs? i turn wrenches on automotive stuff (fuel injected) this is my first time ever and i mean ever doing anything with carbeuration equipment in the 3 years ive been turning. im guessing sync my carbs means syncronize them? and how do i do this thanks-aj

 

maybe lower yer needles one clip on every one

 

could be fuel pressure/volume..

a ghetto way to test fuel pressure is to detach the fuel hose while you blow into the line, simulating strong fuel pressure. Ive diagnosed a couple bad fuel pumps that way. very ghetto but it works for me

 

if the bikes been sitting or never treated well u need to have the carbs synch'd... u need a card synch tool that messures the vacume to each carb and u match that vacume. google carb synch