I have a 2003 Yamaha Blaster, and I'm wondering how do you get to the main jet in the carbuerator? Pics would help me alot, but instructions are fine! I'm not that educated with a carbuerator so try and keep it simple.. Thank You

 

You need to loosen the screws on the carb intake and exhaust boots, and rotate the carb so you can get to the bottom of it. Take off the 4 screws holding the bottom bowl on and carefully remove it. The main jet is then exposed, right in the middle.

 

after that it is just a matter of screwing one out an putting a new one it

 

Maybe some info here:

Service Manuals

 

just so you know, your idle might go up. I found that when i went from a 220 to a 290, might went way up. The idle screw up on top by the airbox didn't do much to put my idle back down. So i went to the air/idle screw, and turned it clockwise and it went right down. I was just thinking about it, and is that screwing it up? Or is it ok that i did that. I also went to the 4 clip on my needle.

 

THX ALOT GUYS U REALLY HELPED ME ALOT I TRYED THE TOOMEY INSTRUCTIONS AND TURNED THE CARB SIDEWAYS AND I DIDNT SEE ANY SCREWS SO I THOUGHT TO MYSELF IS IT REALLY WORTH SCREWING UP MY BIKE THAT RUNS PERFECTLY FINE THE WAY IT IS SO I GUESS I JUST NEEDED A LITTLE HELP THX A BUNCH....... damn caps lock

 

i just put the jet in and it really woke my pipes up cuz it sounded like i wasnt getting as much top end when i installed them but now i have just as much flow as i did when i had my stock pipes thx again!