Advice needed, putting the wrong fuel in the bike

So, long story short, i was a bit of a dipshit and put diesel in my bike instead of normal gasoline. After 5 meters of driving the bike just stoppen working, i called my dad and he picked up the bike and me. When we tot home i did the following: I drained the fuel out of the tank, after that i took it of, as of the air filter, so now i'm at the sparkplugs but i cant reach them with my current tools and i'm asking the advice of you guys/girls. Will it be enough to replace the dirty sparkpluggs with new sparkpluggs or do i have a bigger problem?Bike is a Kawasaki Z400Many thanks in advance via /r/motorcycles https://www.reddit.com/r/motorcycles/comments/fmjz6a/advice_needed_putting_the_wrong_fuel_in_the_bike/?utm_source=ifttt