I agree with ^ that..

But to go a little further, is the fuel reaching the carb? If so, it might be that the carb is gunked up and needs cleaned.. If you are getting fuel to the carb but it's not letting it through, i would take the carb off and clean it good, i just took mine apart and did the same thing to a .32 RR 1, it's pretty easy.....

Actually, if it were me, i would tear the engine down and inspect everything with it being used and give it a good cleaning, even if it dont need it, that way you have every part in your hand inspecting it while cleaning it..