Ok guys and gals I have tried to get this info before somewhere else so I will try again. Thanks for the help if you have answers too!!

My son is racing an APEX Pro Mx 90

Which chain or chain info? Size (428) links (??) etc
Sprocket - What is stock? Are there aftermarket part numbers?
Brake Pads - Aftermarket PArt numbers?

Elka Shocks - Direct Bolt On or mod needed? Will they make them for his specs weight, riding, etc.. Can I get them from Elka or get them from an apex dealer?

Any other consumable type aftermarket parts instead of OEM?

What else do you racer parents stock for the season?

Sorry for all the questions I am just trying to be prepared this year and not repeat unpreparedness of last year.

Thanks again
Mike