Puch Maxi 70 cc kit spark plug??

Anthony G /
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Hi,

I installed my 70 cc kit and it runs fine. After running it for about 30 minutes, i try to shut the motor with the kill switch and it continues to run. I pulled the spark boot out of the plug and it keeps running without spark!

The man from Mopedsonline.com said to use the same spark plug that I used on my 50 cc engine. It is a NGK B6HS. I think the plug is too hot causing it to detonate, should I use a COLDER PLUG????

Also, I screwed up the mixture on the AMAL carb. There are no instructions how to tune the mixture, what is the default?

Any suggestions? Which plug?

Thanks

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