4DP Yamaha TZ250 bottom yoke modified stem

4DP Yamaha TZ250 bottom yoke, with modified lock stops and what could be a later 4TW/5KE stem? This may be because it's hard to find a 4TW billet style yoke, so someone modified a 4DP yoke to get themselves back out on track. Please check photos, as we are not 100% sure on this yoke, it's a 4DP aluminium bottom, but modified and priced accordingly.