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problem with my 2005 yz 250f
moondog said 2009-01-13 01:51
i´m having a slight problem with my zy250f, i bought the bike brand new it runs great once its going but it seems to bog down and backfire every time i ride with the choke off. there for in order to ride it only preforms with the choke on . iv changed and clean the air filter to ´´uni´´ change oil, running engine ice coolnt , it make a good difference but still bogging out .... please help i need to know if i need to re jetted it and what size jets should i go with