Which helix angle for this partnr?

[Chris600]

I have found a sec. sheave with the following part nr:
8BV-17604-31-00. This one is from on VT600 year 2000, but when I do a search is used on many diffent modells.

Which helix angle is it on this one?


EDIT:
I did find it after some more searching

47degrees 8BV-17604-71-00
45degrees 8BV-17604-51-00
43degrees 8BV-17604-31-00