If the plugs are black and wet , go a couple sizes smaller
SOURCE: rough running
This problem, ironically, might simply be the screen filter on the in tank petcock. The zrx is a gravity fed filter-less fuel system with only the screen to act as a filter. I had the same problem with my black 2001 zrx and did a full tune up before pulling the petcock and cleaning away 9 years of sediment from what appeared to be a very clean tank. I simply purchased a seal kit from Kawasaki before the tear down and waited till the tank was as empty as it would get by riding it. The screen was surprisingly clogged with junk...and once cleaned and reinstalled the bike no longer ran poorly when cold. Im not sure why the bike being warmed up made a difference but it did......now it starts and runs like a champ (colod or hot)!!!
SOURCE: Which size Jet Kit for 800 Vulcan Classic?
general rule of thumb is to go up about 10 jet sizes,unfortunately it is a bit of trial and error,and you may have to swap out diferrent sizes to get the bike running right,(jets are quite cheap though)but first step about 10 sizes from standard,your local dealer should be able to tell you what jets are in it and supply replacements,if you change to a hgh flow aftermarket air filter you may have to change jet sizes again as changing the filter may effect the mixture ratio in the carbs,,hope this helps
SOURCE: 2000 kawasaki zrx 1100 how do i change tranny oil
transmission and engine share the same oil, so it is changed when you change the engine oil, and for that reason I change engine oil on my bike at 2 thousand mile interval.
SOURCE: changed from standard air box air cleaner to pod
Going to the manufactures specs or anybody's specs for that matter won't help you, you have interrupted the air flow, Get an adj jet from Dyna flow, I did the same thing, went back to the oem specs and still wouldn't run. Got a Dyna flow kit and off it went. Those things are expensive but worth it. Plus they are adj. And you get a free dyno check if you ever find somebody with a dyno tester. My Mikunis were a little newer, but I'm sure they got something. I found mine on Ebay. Hope this helps.
SOURCE: Hello, The nighthawk 750 1993,
thats a sensitive procedure usually for pros--the float level and valves may need ajust too--buy a clymer manual for total details------------too rich or to lean can damage engine
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