New bike kit and cylinder head cracked

Gunner135

New Member
Aug 12, 2021
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I got a new 80cc 2 stroke bike kit and my bike was stalling out and I had to keep the engine well revved up so it can stay alive. At one point I just couldn't get it to start and I took off the cylinder head and I looked at it and saw a massive crack in the cylinder head. keep in mind I probably only have about 10-15 miles on this bike and I used a 16:1 oil/gas mix. I'm assuming that it's just a defective head.

My question to you guys is... can i get an aftermarket performance cylinder head? Keep in mind that I am still in the break in period. If yall do think I should just get a better head than the stock one than what would you recommend?