29-04-17, 10:30 AM
For me I would worry that 15w would be a step too far considering I am just under 10st and have the same oil in for 19 years but only 20k miles, I have no cornering issues, my forks are non adjustable anyway. I think I too would but 10w in as old for new would be enough of a change --------- wouldnt it ?
I don't do rain or threat there of. dry rider only with no shame.