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Message: [QUOTE="cr125xr600, post: 1152206, member: 75283"] hi, im new to the two stroke world. i recently bought a 02 cr125 , and if you take off without letting it warm up for a few minutes it will fuel foul the plug, it also has no low end power. from what im reading it is a jetting problem. my question is my bike has a wiseco piston(lighter) and v force reeds in it with a stock primary pipe and a fmf silencer. i have no idea what jets are in it . do i need to go back completely stock jetting or does anyone have a baseline where i should start.using hp2 oil and 93 octane fuel . stock plug [/QUOTE]