Please help. I just bought a brand new 04 CR125R and it hasn't run right since I got it. It has already been in the shop once to replace the top end. I just it back and went riding and now the carborator floods at full throtle :bang: :bang: :bang: . Can anyone help
Set the float level and jet it properly and your troubles will be over.
Do you have much experence with 2-stroke MX bikes? It is somewhat normal to need to "clean it out" after starting and warm-up. Hold the throttle open for a bit untill it revs out well. It should run nice and crisp after that. If not, you need to re-jet.