01 CR125 steering stem nut, what size is it?

I am heading on vacation to West Virginia and I am going to help two friends re-grease their linkage and steering stem bearings on their 01 CR125. I would like to know what size metric socket I need to get the steering stem nut loose. Someone told me their 01 CR250 was a 32 mm, is it the same for a 01 CR125?

Thank you very much for your help.

Rick