well it needs at least 25ml of 2 stroke oil to each litre of petrol any less and you risk seizing it up.but if you put too much in it will cause it to foul the spark plug.make sure you give the bike a good shake from side to side before you ride it if its been standing overnight as the oil will sink to the bottom of the petrol and will make it foul the plug,also make sure you turn the fuel off when you finish riding it as the oil will also sink to the bottom of the carb and that will make it foul a plug or run weak also.ok good luck.adam
adam bike doctor
May 2006
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