I had the same NGK No. 6 on it, but since I replaced the CDI, I moved up a number.
Whether No. 6 + NORMALCDI or No. 8 + external CDI, the engine is activated with a single Cell or Kick and runs well.
Be careful not to over-tighten when putting it on.
Looks like you access from European region.
Would you shop at webike.eu.com?



