[Justincoty327]

I have a 2014 yfz450r with an fci, full yoshi, and msd. I want to get a big bore kit and a set of cams before I get my head ported by mmad. Can anyone point me in the right direction? I am mainly going to be drag racing. What bbk would give me the most power? And what displacement should I go with. 480, 501, 520? I just want to get the best one for power and that is going to hold up and not have to be rebuilt every time i ride it haha

 

[diypunx]

Might as well just talk with Geoff @ MMAD and get his current recommendation. A JSR 480 is going to be the most reliable followed by an Athena 480 kit.

 

[YamahaDuner14]

Talk to geoff at mmad if ur going to have him port ur head. He will set u in the right direction. Just tell him what u want to do with the build, what type of riding, a budget if u have one, etc.

 

[Justincoty327]

Alright, thanks guys. He's just so hard to get ahold of. I called him all day today haha

 

[buckwild]

Alright, thanks guys. He's just so hard to get ahold of. I called him all day today haha

Keep calling,persistence pays off in the end,there's a reason he's so busy!