Helix Identification ?

[givemeaboost]

Helix Identification ?

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I've got a secondary clutch with a 8BV 30 helix on it and it doesn't show up in the Yamaha helix chart. I know the 8bv31 is a 43 angle but I would like to find out what this 30 is. Any ideas?

Ken.....
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[Turk]

43

 

[givemeaboost]

Thanks Turk. I wonder why there are two different numbers for the same helix ?

Ken.......