jackshaft sprockets on Rupp Xl 500

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I know I've seen a thread discussing this? I did a search and can't find it. What are the stock sizes/ part nos for the jackshaft sprockets? Are both 12T sprockets or is the outboard a 13T ( #124 )? The Blackwidow parts diagram lists

XL 500

#Item 123 - 12T sprocket /part number 12315
# Item 124 (Outboard) - 13T sprocket/ part number 12315 i.e. both are same part number?

Thanks in advance!!

joel

1968 Rupp Minibike Part # Catalog

 

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Ok, I think I've figured this out. The XL350 and XL500 share the same size jackshafts (TT500 has a different sized Jackshaft). So the part number for 13T is probably #12925 as shown for the XL350. Blackwidowmotorsports has #12315 12T available on their website.

joel

 

[Bink]

I know I've seen a thread discussing this? I did a search and can't find it. What are the stock sizes/ part nos for the jackshaft sprockets? Are both 12T sprockets or is the outboard a 13T ( #124 )? The Blackwidow parts diagram lists

XL 500

#Item 123 - 12T sprocket /part number 12315
# Item 124 (Outboard) - 13T sprocket/ part number 12315 i.e. both are same part number?

Thanks in advance!!

joel

1968 Rupp Minibike Part # Catalog

Also, if I flip the input/output gearing on the jackshaft 13T/12T (XL350) to 12T/13T(XL500) the final drive gear ratio goes from 5.42 to 4.62 .