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im starting to hate my tw

1953 Views 10 Replies 7 Participants Last post by  demarko69
ive done almost everything now. new carb parts 117.5 main jet. new needle and seat. carb is 100% clean. i am pretty sure it is the cdi unit. it runs rough and sputtery, almost like a lean issue, but i know it is not because i have a brand new spark plug in it and it has black on it because ive been trying to fatten the hell out of it. it backfires when let off the throttle. im not sure anymore here!? the engine is sound. it have better than factory compression and the valves looked amazing. ive been chasing my problem as a carb issue but i think im going to have to go the more expensive route with a cdi. any suggestions on where to get one for cheap and fast, how to test for it. etc? it is a 1987
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im just going to take it in to the dealer. he said $80+ tax and he will tell exactly what electrical component is the problem/if there is a problem. im just exhausted with testing and replacing with no luck. it is a 87' but i didnt expect this kind of problem. i mean it only has 7,700 miles on it. before droping $300 on a part it might not need im gunna take it in to find out for certain what is the problem. thx guys
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