helix help

[chriserie]

can anyone tell me what angle a 8bvfa helix is

 

[ottawaair]

What number is stamped after those letters. Should be like 70 71 50.

 

[chriserie]

there are no numbers after

 

[chriserie]

all my other helix have another number after this one does not but all the other ones only have three letters

 

[bluemonster1]

here is a yamaha chart..but need them numbers

 

[SXRider7Hundo]

Should be a 51/43...