Chimera seat and carb Sven's Chimera 250 (1963) Add comments Mar 192022 I have disassembled the seat which will get new paint and new springs. I am already experimenting with available new springs as a replacement. The carburator is a Dell’Orto UB 22 BS2 and it seems like it was painted black back in it’s days. Leave a Reply Cancel replyYou must be logged in to post a comment.