Cheers for this mate, I’ll edit the postIf it's a 91 are you sure you don't want 1" 1/8 stem. Pretty sure from 1990 onwards the Pine Mountain was 1" 1/8 until ahead came along.
Needs to be a quill stem not aheadFound this, if it helps
https://www.ebay.co.uk/itm/166318941786
My apologiesNeeds to be a quill stem not ahead