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    What Spark Plug for Heiden Tuning 750cc big bore kit

    Does anyone have experience with which spark plugs I should use with the Heiden Tuning 750cc big bore kit? I was just going to pick up some BP7ES plugs but thought I would ask first if they are appropriate for this mod? Thanks, Nelson
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    Correct Jetting for XS650 bumped up to 750

    I am cleaning the B38 carbs on my 77 XS650D getting ready to reinstall them after rebuilding the engine. I have installed a Hayden Tuning 750cc big fin cylinder block and have turned the crank 83 degrees. What do I need to do to the jets on the carbs for the larger displacement? I am not...
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    What is this electrical part?

    I took my XS650D with Velorex sidecar apart to restore it in 2010 or there abouts. Life got in the way... now I am back to working on it. I got the motorcycle and sidecar frames and parts back from the powder coater a few months ago. Also parts from the chromer. Ive been putting it together...
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