Hey guys, I have a 2014 grizzly 450 eps, and naturally I love it. After putting some 26×9.5×12 and 26x12x12 TSL vampires on my machine I’ve noticed a drop in my bottom end power. I’ve been surfing the forums trying to figure out how to bring out more power in my machine and I was hoping you guys would be able to point me in the right direction. Here’s what I turned up so far.

Uni air filter – on order(k&n breathes TOO well and doesn’t offer as much protection)

Shim mod: I’ve found forums for the 450 saying 1.5mm is too much and that you can only fit 1mm in…opinions? Also, where do I buy the shims?

Secondary spring/weights: I want to do the shim first to see if this needs to be done as well, but where do I buy these items and how do I know which spring to use? The different colors do different things, and I haven’t found a post talking outlining what makes the different colors different.

Carb jetting: I see people talk about this frequently, is this just resetting the carb needles or what?

Exhaust pipe: Naturally a first step in pulling out more power, which one do I need or what are the top three to pick from?

Any other mods to improve my bottom-mid range mud slinging torque that won’t set me back more than $500?

Hey guys, I have a 2014 grizzly 450 eps, and naturally I love it. After putting some 26×9.5×12 and 26x12x12 TSL vampires on my machine I’ve noticed a drop in my bottom end power. I’ve been surfing the forums trying to figure out how to bring out more power in my machine and I was hoping you guys would be able to point me in the right direction. Here’s what I turned up so far.

Uni air filter – on order(k&n breathes TOO well and doesn’t offer as much protection)

Shim mod: I’ve found forums for the 450 saying 1.5mm is too much and that you can only fit 1mm in…opinions? Also, where do I buy the shims?

Secondary spring/weights: I want to do the shim first to see if this needs to be done as well, but where do I buy these items and how do I know which spring to use? The different colors do different things, and I haven’t found a post talking outlining what makes the different colors different.

Carb jetting: I see people talk about this frequently, is this just resetting the carb needles or what?

Exhaust pipe: Naturally a first step in pulling out more power, which one do I need or what are the top three to pick from?

Any other mods to improve my bottom-mid range mud slinging torque that won’t set me back more than $500?