Yamaha 225dx wont start help!!

[yamaha driver]

I have a 1983 yamaha 225dx i use to have to put a hair dryer on the carb so it would start. Now when i try to start it with or without it the plug is dry. But if i put gas down the spark plug hole it will run and start fine. i have a fuel filter on it with a new petcock so there is no dirt getting in there. the only thing i could think of is the intake boot right? or what else could be making it do this

[Headsup]

Try cleanign your carb? if your Flushing gas down Spark hole and it fires fine.. Sounds like your not getting gas.. Check to see your jets are not clogged..

[muthey]

I would look to see if the float needle is stuck most people don't realize that on this mikuni carb it has a rubber sealing tip on it , and if it is wore too much it will get stuck, or not seal

[Jason125m]

Rebuild your carb, you'll be running perfectly again

[yamaha driver]

ok i found out what it was at the head were the boot from the carb meets there was a crack a knife could fit in it all the way around it. i replaced the boot now it starts no matter how cold