Apollo 250 wont start with new mikuni carb

[jct842]

There has to be some thing blocking fresh fuel on the new carb.

you might try to blow some air thru the fuel inlet with the bottom off to check the path to the float valve. I don't think I would get carried away with 120lbs of air but some thing is keeping the fuel from entering the carb.

[MotoJunkieDillon]

Alright, I'll give it a shot and see what happens

[FLASHLIGHTBOY]

Hello... if you have fuel in the bowl and you know the float is good... then your carb is sucking air instead of fuel into the motor.. because the sparkplug is not wet then this tell you it is not sucking in fuel from the carb.. check your mounting to the intake pipe... the other carb for some reason is sucking in the fuel.. could be as simple as the oring not seating to the pipe for the intake... check and make sure it is there... I have have them fall off during installation... my fault... and you could put some peratex #2 on the mount ..it is not drawing in the fuel into the intake manifold... Weldand grind had a problem with the oring cut out being to deep one time . drove it crazy to find that out..put a straight edge on the carb mount to see the oring sticking up a bit from the carb mount..