quik help plz

[smokin 2 stroke]

ok so i am thinking bout buyung this head in ebay it is a 69mm, 21cc, 9 degree dome. Will i need to run race gass with this or what.

[Bansh-eman]

like i say 100 times a day, the only 100% way to know is a compression test bro sorry.

[smokin 2 stroke]

Yes you are right about that. but the smaller dome the more compresseion or is the other way around.

[FredMW]

The smaller the dome , the higher the compression.

[Bansh-eman]

Yes you are right about that. but the smaller dome the more compresseion or is the other way around.

yup the smaller the dome the higher the compression

[smokin 2 stroke]

ok thanks alot