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Hey Vital. I changed the oil and powervalve spring on my 17 ktm 250 sx and started it up for a short ride down the road. After running for maybe 2 minutes it died without any sputtering. The engine did not seize but it feels like it lost some compression and the throttle doesn't turn normally. I have 17 hours on the bike.
I changed the spark plug and tried starting it again but it wouldn't start.
What could have possibly happened? I had gotten oil through the filter at about 10 hours but changed the oil and had no issues. I don't think that is behind the issue today.
Thank you.