ok i have a 85 250 big red i have been using a cdi of a 200 trx i switched the plug from the round one to the 2 square one , my problem is i have bought 3 cdis off ebay used and no of them work on my bike the all said came from a running bike , 86 87 same plug . i thought the 85 was basicly the same is there something in the electric thats diff or did i get 3 bad cdis ? thanks for any info .


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