Bad missfire????? NEED HELP
The 1st part of this is from a previous thread I posted.
I just purchased a 88 klr 650 with 7000 miles on it. Been sitting for 15 years. Cleaned the carb, tank and change the oil, filter and antifreeze and it ran great for 25 miles. On my way home it started to idle around 3000. Shut if off with I got home and left it til the morning. The next morning there was gas all over. It was leaking from the air box. Went to start it wouldn't crank. Took out the plug and the cylinder was filled to the top with gas. Cleaned the carb again, dipped it, put it back together and and it was tuff to start and ran with a bad miss. Let it cool started it again and it ran better then ever, until I tried to ride it. Stalled then ran crapy again.
Rebuilt carb,petcock and replaced the plug changed the oil. Same results. Spark plug was carbon covered with a short amount of run time. Light black smoke out the exhaust when reved up. Just can't figure it out.