Hi, I’m after purchasing a 95 beta techno 250 that could do with a bit of a cleanup. I trying to source rear mudguard and wiring diagram along with some other parts and looking for advice where best to look. It looks like the age don’t make it easy. 

You could fit a piece of plastic under the fender - drill & rivet with back up washers on both sides of the rivets---    it may look rough, but function beats looks anyday.  

My 1997 Techno had a worn out crossover tube above the carb- this tube feeds fuel from the frame - gas tank. I replaced the tube while the carb was off the bike.  Replaced the gas petcock also. I never run the petcock on its on position. only use reserve position.   on position feeds gas tru a too small tube that is too long. some rides i go on are 1st & 2nd gear  VERY steep for 2 or more kilometers constant, bike will starve for gas. No i have never rode a proper trials event  --  i am 62 years young- started riding at 6.  --   every dent, chip on my riding gear has a story to tell-----