arm
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    • arm
      arm replied to the thread 1978 Yamaha XS400 full tune up.
    • arm
      arm replied to the thread XS400 Wiring help needed.
      Thanks ill check those diagrams out The mikes ignition is something I'm not a fan of either but the bike came with it and at this point...
    • arm
      arm posted the thread XS400 Wiring help needed in The Garage.
      Hey guys, im still working on getting my XS400 up and running, at the moment I'm dealing with the left side spark plug not sparking...
    • arm
      arm replied to the thread 1978 Yamaha XS400 full tune up.
      I went out and bought a new battery today, charged it up, and still haven't had any luck with the left spark. It looks like it has to be...
    • arm
      arm replied to the thread 1978 Yamaha XS400 full tune up.
      Update on this, I pulled off the top end of the engine and rotated the crank shaft to be at 12 o'clock, the engine was on LT and TDC...
    • arm
      arm replied to the thread 1978 Yamaha XS400 full tune up.
      Quick update — I reached out to Mikes XS and got the suggestion to check the resistance on both ignition boards. Interestingly, there's...
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    • arm
      arm replied to the thread 1978 Yamaha XS400 full tune up.
      Update, i finally got some time to test for continutiy using this multimeter i set it to the upper OHM setting and put either ends...
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    • arm
      arm replied to the thread 1978 Yamaha XS400 full tune up.
      Thanks for the reply! Ill forsure give that a try sometime when the weather is a bit warmer up here. something that I'm still confused...
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