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75 dt 400 out of time?


yamahamike
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Hello, I've got a bike that starts, idles fine but 3/4 throttle backfires pretty bad. Messed with the timing no change. Put a timing light on it and seems like the mark on the magneto is about 2" early on the pulsar pick up. So, maybe the cdi? Someone cut out a lot of the wiring to make it more of a dirt bike. Anyone have any ideas? Thanks in advance

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Sounds more like the coil is breaking down,I would swap out the coil first.

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Well you dont have alot of options here,pick up coil and cdi are the only 2 things left.Check all connections to ensure they are not vibrating loose ignition switch and kill switch as well.

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Most of wiring is cut out, no key but I tried connecting the red and brown wire out of the terminal, no change. Will check wiring again. And woodruff key is good

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Cdi no points, no key and the kill switch is a wire that you touch to the handle bars. No blinkers , no headlight, no voltage regulater, and the only electronics left is the cdi box.

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