[staxpoker]

Here’s some results for Dasa, RP and rossier r5.
RP came in first
Dasa second
R5 third but has the best torque

none of them were perfectly tuned.

Dyno results top 3 ama legal exhausts

 

[ilikebike]

All within 1hp I mean you could probably get close to that fluctuation just by running the same one twice.

 

[staxpoker]

That was the best run out of 3 runs per exhaust. But ya very close

 

[staxpoker]

 

[staxpoker]

46.96 was the best run with rossier
47.71 best run for RP race

Rossier sounded amazing and had best torque.
RP sounded really good too.
Not sure which one I would get.

 

[atvman8351]

I’d go with rp if I was doing it again

 

[ilikebike]

I’d go with rp if I was doing it again

I also agree rp seems to be a good choice

 

[staxpoker]

Yeah I think I will get the RP also. Sarmiento Motorsports said he prefers the R5 because of the how snappy it felt but he also has the RP on his bike so idk :/

 

[yfz_gavin73]

I am a big fan of RP, but from my quad community on the west coast, I’ve heard nothing but bad for running an RP on a yfz. They’re best ran on a trx they work well together. As for dasa, they’re nice on yfzs and trxs, but people run them on any bike. Dossier I don’t have an opinion on.

 

[kb motorsports]

The Rossier beat the RP on PEP's dyno according to [email protected], but I don't know the supporting mods. RP, Rossier, DASA, Barker, and Empire all make an awesome system for the YFZ450R where fine tuning and supporting mods will shift the winner.

 

[staxpoker]

Sold my HMF today. Torn on what exhaust to get!

 

[atvman8351]

Rp

 

[staxpoker]

Which one is better the RP regular or Shorty?

 

[atvman8351]

Regular will be quieter

 

[yfz_gavin73]

Sold my HMF today. Torn on what exhaust to get!

I wouldn’t go with rp for a yfz especially if it’s an efi model but that’s just my opinion, I also don’t know where you ride or your type of riding.

 

[ilikebike]

I wouldn’t go with rp for a yfz especially if it’s an efi model but that’s just my opinion, I also don’t know where you ride or your type of riding.

Why do you say that rp is one of the top for hp

 

[staxpoker]

I wouldn’t go with rp for a yfz especially if it’s an efi model but that’s just my opinion, I also don’t know where you ride or your type of riding.

I ride a bit of everything. MX, dunes, trails, desert. Most is MX tho.

 

[atvman8351]

Rp is fine. Go to a local race and see what guys are running

 

[staxpoker]

These are my old HMF results.
Didn’t realize how good they are…