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poor spark

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diabolics:
Hi. I have a k2 cb750 and I am having real problems statring it. It has a boyer fitted by the previous owner. I have replaced the plugs caps and coils but still seem to have a poor spark. I have charged the battery and cleaned the battery connections including the earth on the frame. Starter spins fine.Has anyone had a similar problem and hopefully found a fix. Any thoughts appreciated.  Thanks Adrian

AshimotoK0:
Download my coil repair guide and follow the first bit check out the coil resistances, both primary & secondary. The Boyer system is very reliable and if working at all then it should be fine. Check the earth connection to the unit, possibly run a separate temporary cable.

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