That's too big. Bigger does not necessarily mean bigger. You may think it will make more power because it's less restrictive, but in reality a blaster, at least a stock or mildly tuned one will never be able to take advantage of it. Your airflow velocity will be low, and the fuel won't atomize as well, so you end up with less power and sluggish throttle response with no real benefits. 30mm is the biggest you'd want to go without a big bore on a blaster.