High comp head?

Discussion in 'General Questions' started by Cylon, Aug 15, 2015.

  1. Cylon

    Cylon Member

    What kind of benefit does the high comp head have to offer? Im considering it but I dont know if it is worth it, I have one bike I put a expansion chamber on and jetting it right after that was a pain in the ass what would the head alone do to a stock motor.

  2. butre

    butre Well-Known Member

    more compression means better efficiency, which is an overall improvement in everything from torque to power to fuel economy. more compression means hotter explosions though, so you want a head with more surface area (such as a fred head or a puch hi hi) and/or a colder spark plug (ngk b7hs is generally preferred)