Boring 300ex Carb

[300XFST4602]

Ok i am thinking about boring my 300ex carb out , but to what MM, and is this a good idea or not? Where can I get it done at too. Thanks Ryan

[Doibugu2]

I'm not sure about this, but it might be better to buy a 400 carb. I'm sure it would be much cheaper.

[Aceman]

I agree with Doibugu2, I think it would be easier to purchase a used 400ex carb off of the for sale forum than to bore your stock carb. I believe you need a 350x air boot also for the conversion.