'00kx250spode
Member
- Oct 21, 2000
- 197
- 0
I was talking to a friend who likes to tinker with car engines about the power valve that the 2-stroke bikes use. Do 4-stroke bikes use them, too?
I was saying that the power valve closes when the rpm's are low so that there is more back-pressure - which increase low-end power.
But I couldn't explain why back-pressure can be a good thing. Can anyone give me a concise explanation?
Thanks, Mark
I was saying that the power valve closes when the rpm's are low so that there is more back-pressure - which increase low-end power.
But I couldn't explain why back-pressure can be a good thing. Can anyone give me a concise explanation?
Thanks, Mark