Are all these pipes slip-ons? I take it your statement means the pipes don't help unless you introduce fuel through a power commander or like unit. What's the seat of your pants report on the pipe, filter and Dobeck?

 

Trinitys stuff is suppose to be out by the end of the month, they have a full system

 

I think Big Gun is a complete but the others are slip ons. Alone they help a little but not much.
Togather My guess would be 7-10 hp. Over the weekend at Sand Mtn Ut I raced several piped YFZ's, 450Rs, and even some worked Raptors and came out ahead more often than not. I weigh 250 lbs
HMF claims 8 HP with their slip-on and a Dobeck TFI and the stock filter. Next week I am going to take it to KBR and dyno tune it. I plan on turning off the Dobeck and putting the stock pipe on for the first pull. then tune the setup for max.

 

Trinity needs to come up with a heat sheild for their pipes.

 

There are some on ebay too.

 

I Agree, The 700 pipe gets warm enough with a heat shield

 

DMC now has a pipe out

http://cgi.ebay.com/ebaymotors/YAMAH...QQcmdZViewItem

and white brothers