MZ/MuZ Riders

My st which i bought 4 years ago wont fire up will crank over now new battery is on fuel pump works
had minmal fuel in tank got back to normal size put fresh furl in nothing
any ideas
sf working fine 30000 miles -awesome
s new fuel pipe hopefully fit by weekend, hope thats all-everything else was ok
st electrics consdition mint just gotta get it firevup

stay safe

Hi.
If it`s had fuel in the injectors for years i would expect them to be gummed up with residue.