Stock OEM Helix Degree Angle on a 1978 SRX

[Blisteringsnorider]

What is the degree angle on a stock 1978 SRX helix??

Thanks for the comments in advance

 

[ramblnman]

What is the degree angle on a stock 1978 SRX helix??

Thanks for the comments in advance

it is a dual angle 45*/39*

 

[Yamaha Nutz]

close but you have the angles backwards 39*/45* I know it makes no sense but it works this is the 8A7 helix

 

[silverrocket]

close but you have the angles backwards 39*/45* I know it makes no sense but it works this is the 8A7 helix

I checked the angles with a protractor on 2 8A7 helix I have and they are 42*/37*. Is 39*/45* a custom cut?