KLE 500 1999 wont start
Hello,
I recently bought a KLE500 1999 and it ran fine and drove it home around 200km. The next day i decided to check the spark plugs because of a noise that appeared when i was driving home(Im new to this bike in the end it was the exhaust gas valve thing the plug fell off), i removed one looked at it and it seemed fine so i put it back in and it wont start. Checked everything on the bike, there is fuel air and spark the timing is right, the valve clearances are good too. The only bad thing is the compression at 4 bar but in my opinion it should still start as it ran when bought( it also started the next morning before it took out the spark plug). Right now i put new ignition coils on it as i thought that is the problem it sounds better but still no start. I have tried starting it on ether but that didnt work either.
Many thanks in advance for ideas