ok guys up date
ive called all the yamaha dealers and came back with the same answer…$58 just for 1 locknut and 6 to 8wks for it to come
so down to the local nut & bolt shop and came away with a new one for less than $1 yep $1 here are the details if you need one
M16 x 1.5p *fine* CL8 locknut
Thanks for the info i hope it helps somebody