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Message: [QUOTE="pc kawi148, post: 1010939, member: 58353"] I have a 2003 KX125, I just put a new top end in it, and cleaned the powervavle thoroughly. It broke in fine, had two days of easy riding on it, now I just started to really get on it. I am running Klotz R 50 at 32:1 at first now I am at 40:1. When I was running it at 32:1, it seemed like it was always loaded up, even after wot throttle for about 200 yds, then it would clear out. It sounded all broken up. Yesterday, I put a brand new plug (4th one) in it, it ran fine for 10 min., then i was coasting down an alley way, and it started to die so i gave it a little juice, it bogged real bad and died. So i cleaned the spark plug off, switched to 40:1, and it starts easily, kinda loaded up, I try to clear it out, then it just bogs and dies. I can just keep cleaning the sparkplug off and it will keep starting. Please Help [/QUOTE]