these 125cc bikes seem to loose the prime in the carb when they set a while
there is a cap on the air tube from the air box to carb remove it and open up carb and stick a small hose in past the carb and pump in about 10cc of fuel
well past the carb ..remove hose turn on the choke and crank for a bit with throttle closed ...
any open throttle does not let carb get a prime
may have to do this several time as it may start and die several times
before it starts and stays running
i use a jumper battery on the starter and let the on board battery run the coil
last time it took 2 or 3 min of cranking befor it started firing
but i did not do a pre prime
ar dave
18 months in shop i can see why your called jayed 1
after 50years i have found it best to keep the bike out of dealers shop
they seem to run better the farther you can keep them from the shop