Check/Replace spark plugs

Yes, there are specific sockets for spark plugs, usually a deep socket with a rubber insert to stop the plug dropping out. For the ZX bikes you'll need a 'thin walled' type. eBay does them as a set for a sensible price.

Here is a link to videos on UTUBE that you can watch . Hope this is helpful !!!! Grant

https://www.youtube.com/results?search_query=How+replace%2C+locate+and+access+battery+on+kawasaki+ninja+ZX9R+2001%3F

Is there only gas in tank or some dieselor other like sugar..checplugs for black or gunk. Inspect cuts in wiring or loose screws

Sounds to me you need to check your spark plugs

Check the maintenance schedule in your owners manual or on www.ex-500.com. The 500 requires a valve adjustment and carb sync every 8000miles. Spark plugs should be checked and replaced, if fouled at the same time as the valve adjustment.

Make sure you are getting a solid spark to the plugs - Take out the plugs and leave them sitting on the head, turn over the engine and see if you are getting a strong blue spark. If not, I'd say your CDI unit needs replacing (Capisator Discharge Ignision)

I haven't worked on a ninja of this year, but most sport bikes this year require you to remove the seat, then tank, then air box, and the spark plugs should be accessable at that point. It's not difficult, but usually takes a couple hours if you're being careful. Make sure your gentle with the fuel lines.

no you simply undo the bolts at the front off the tank remove the seat aswell tilt the tank back remove air box and remove coils and get a spark plug socket and insert in the heads and unscrew the plug done if you want more info get back to me