Spark plug / Adjustment of accelerator cable – SM 400


Remove the spark plug and clean it. According to the maintenance schedule by using a small wire brush scrub clean.


Standard spark plug DPR8Z


① Insulation prevents leakage of electric current.

② Spark plug gap distance.



Standard value, spark plug gap distance 0.6 – 0.7 mm.



Standard free distance    =  2 – 6 mm.

Adjust the free distance of accelerator cable
  • Loosen nut ①
  • Adjust nut ② to get the free distance as standard.
  • Tighten nut ①

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