Moby 50 V top end

Have 70 cc arial on stock Moby 50v. At top end approx 32mph hear a tik tik tik coming from motor. Thought I read explanation here before but can't locate. Is it a timing issue?

Re: Moby 50 V top end

Totally normal JBOT /

Is the piston hitting the head? Are you using the 50cc stock head?

Re: Moby 50 V top end

tik tik kaboom

Re: Moby 50 V top end

Jerry Novotny /

Not stock head. Have an Arisal 700 cc kit installed.

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