Ok guys so planning to service the bike soon, my mate ordered some oil for me through his work - CASTROL ACTIV 4T

unforntunatly when it came to getting primary oil & brake fluid none of his lube guides had anything marked down; they were all marked with - refer to dealer

I was assuming i could use any DOT 5 brake fluid, but im still un sure as what to use in the primary?

ive got an 02 xlh883

the castrol site say the oil is 15w50 - mineral based - if its incorrect i can return it, he'll just hand it back to his supplier

my HD manual says for the primary Harley-Davidson Sport-Trans Fluid

Primary & gearbox use same as engin dealer told me

yea the primary and box are as one when it comes to lubricant on the sportster models.

one of his suppliers keeps limited motorbike supplies in their warehouse (bikes aint the same as cars when it comes to suppliers)
I think its Bel-Ray stuff