OK guys, gonna be gettin the 2007 YFZ, I am stuck on gettin the White Bros pipe or the HMF, I have had good experiance with the WB pipe on my 400 ex but I am hearing goods thins about the HMF on the YFZ give me your opions or others options on the YFZ.

 

Both make a good system. I have an HMF carbon fiber, and it is quality. I really like how the mounting system bolts up to the pipes' core. White Bros was on my short list as well, which model do you have, which one are you looking to buy?

 

Like the performance of the WB, but have had issues with the weld. Have heard from others that have had the same problem. Not a big deal if you have access to a welder, but still a minor pain.

 

I had the E-series slip on, on my 400ex. I the white bros is a bit cheaper than the HMF. None of my friends run the HMF i am just going off of what I am reading on the forums.and the HMF seems to be a very popular setup. I know most of the pipes are so close as far as HP gains its just a matter of preferance and looks . how do like the carbon fiber HMF , is it the full system, what is your jettin settings.

 

The Carbon Fiber doesn't add any HP, I just like the look and got a good price on it. My brother has the colored aluminum can, full system also. I can't remember exactly where the jetting is, I think 45 pilot, 175 main, and either 3rd or 4th clip on the needle. Don't know what changes they will have on the '07, but we both have the 439cc motor.