needing to know compression level, and bore size

[dmfisher71]

just got first banshee i grew up riding 2 stroke bikes but that was before i knew alot about bikes and quads and everything i have had since have been 4 stroke. i am currently working ona a 94 a arm frame and just got a GREAT buy on an 87 motor i am needing to know what the compression levels on the top end to tell you a little about the motor it has a stock stroke hot rods crank, 66.5mm wiseco pro lites, pro design cool head w/19cc chambers, stock reed cages w/fmf reeds, stock carbs with TORS removed. Got this motor with everything i just listed (including carbs and cable) for $550 shipped i figure for that price i will at least need to re ring it. but i am just needing to know what psi that this motor should hold. and also if you can tell me how large you can bore stock cylinders before they are junk.

[rdzbangshee]

just got first banshee i grew up riding 2 stroke bikes but that was before i knew alot about bikes and quads and everything i have had since have been 4 stroke. i am currently working ona a 94 a arm frame and just got a GREAT buy on an 87 motor i am needing to know what the compression levels on the top end to tell you a little about the motor it has a stock stroke hot rods crank, 66.5mm wiseco pro lites, pro design cool head w/19cc chambers, stock reed cages w/fmf reeds, stock carbs with TORS removed. Got this motor with everything i just listed (including carbs and cable) for $550 shipped i figure for that price i will at least need to re ring it. but i am just needing to know what psi that this motor should hold. and also if you can tell me how large you can bore stock cylinders before they are junk.

[/quote max bore on stock is 68 mm if you have stock port job 130 psi comp they can be re sleeved

[dmfisher71]

just got first banshee i grew up riding 2 stroke bikes but that was before i knew alot about bikes and quads and everything i have had since have been 4 stroke. i am currently working ona a 94 a arm frame and just got a GREAT buy on an 87 motor i am needing to know what the compression levels on the top end to tell you a little about the motor it has a stock stroke hot rods crank, 66.5mm wiseco pro lites, pro design cool head w/19cc chambers, stock reed cages w/fmf reeds, stock carbs with TORS removed. Got this motor with everything i just listed (including carbs and cable) for $550 shipped i figure for that price i will at least need to re ring it. but i am just needing to know what psi that this motor should hold. and also if you can tell me how large you can bore stock cylinders before they are junk.

[/quote max bore on stock is 68 mm if you have stock port job 130 psi comp they can be re sleeved

 

 

 

thanks alot man i appreciate it

[firebanshee]

66.5mm is the max you can bore a stock cylinder before they are junk. You can't bore a stock cylinder to 68mm without resleeving it. If you resleeve a stock cylinder to 68mm then your transfer ports are kinda small to support that big of bore.

[firebanshee]

can't edit post

 

If you have a 19cc dome with a 66.5mil bore that would put your compression over 200 psi with that big of bore at sea level.