Learning new guy. Exhaust question

[Tony72373]

I've learned a lot building my 4 stroke, 4g cruiser from your site. Lots of information and experience here. I have a question for you members.

I just received my "poo poo regular pipe exhaust " and was concerned about the exhaust outlet. The outlet being 3/8" diameter and the manifold being 3/4". With the haushung 49cc 4 stroke enine is there a back pressure issue (or anything else) I should worry about? Most build pictures show the same type of pipe outlet. Just seems a tad small. It is the newer welded, baffled version, no bolt on end cap.

Thanks all.

 

[Tony72373]

Anyone?

 

[Frankenstein]

Anyone?

I wouldn't think so, KCvale uses the same basic engine and muffler set up, and as far as I know he doesn't drill it out or anything special, from that I'd assume the back pressure isn't enough of an issue especially at a mere 49cc and the exhaust stroke occurring half as often as it does on a 2 stroke.

Have fun!