Is an Aftermarket intake more harm than good?

[Josh young]

I’m putting an aftermarket air filter with a “worked” carb on my Lifan 79cc motor.
I ordered an aftermarket intake, which is basically just a bent pipe with a rough inside surface. I plan on porting and polishing it the best I can by hand with sand paper.
But my question is, does an intake actually increase performance? Or would a direct connection from the carb to the head provide a more efficient fuel supply. Thanks!

 

[Redneckcruisersoftexas]

I’m putting an aftermarket air filter with a “worked” carb on my Lifan 79cc motor.
I ordered an aftermarket intake, which is basically just a bent pipe with a rough inside surface. I plan on porting and polishing it the best I can by hand with sand paper.
But my question is, does an intake actually increase performance? Or would a direct connection from the carb to the head provide a more efficient fuel supply. Thanks!

In theory a direct connection would be better because the shorter distance would mean faster fuel delivery which would result in climbing rpm’s faster

 

[Larry Trotter]

I believe you will find that intake length affects how your engine performs in different rpm ranges. Longer length intakes usually provide increases in power at higher rpm.

 

[Venice Motor Bikes]

I believe you will find that intake length affects how your engine performs in different rpm ranges. Longer length intakes usually provide increases in power at higher rpm.

You are correct sir!! (short intakes are for low RPMs, & long intakes are for high RPMs).

 

[Mossy]

Short fat exaust pipe for high rpm long skinny Enduro pipe for low end on 2 stroke or a straight rectangle tube cut to length (11-13") to tune for all out unrideable power band...