Rossier Engineering Exhaust 1st gen and 2nd gen

[jaredp]

I feel the need to clarify the difference between the old YFZ450 and our current pipe for both the YFZ450 and the YFZ450R. This pipe was developed for the YFZ450R. It has a 5 stage (steps) system as compared to the 3 stage old YFZ450 pipe. The muffler is different with a larger core, and has a mega cone tip.

The old pipe was featured in the pipe shoot out here. Pipe Shootouts Condensed


This system makes 1.5 HP more that the old 04-08 YFZ450 exhaust and will fit the old YFZ450. The dyno sheet is with a RE pipe, no air box lid, free air kit, and PC5. This is a big core 14" can just like the can from our raptor pipe.




We offer a few additions for this system

The first is a spark arrestor to make the system trail friendly.
ROSSIER Engineering - RE Spark Arrestor
Please note if you have a old or new pipe when ordering.


A quiet kit will knock the noise down to a bearable 94 Db.
ROSSIER Engineering - RE Quiet Kit
It comes with twelve discs, a custom RE end cap along with all the necessary hardware.
We recommend adding the supplied rivets to help carry the load of the quiet kit on the can.

[robtorres36]

looks great

[Terse]

You sau it has a mega cone tip, does that refer to the shape of the cone or the actual inside cone shape?

Got any pictures of the header with the steps?

What is the inner core diameter? 2.25", 2.5" ?

Sounds like a great pipe. I'd love to see it in a pipe test with other pipes.

What is the db with out the quite core disc's? 102-ish?

[jaredp]

Originally Posted by robtorres36

looks great

Thanks!

Originally Posted by Terse

You sau it has a mega cone tip, does that refer to the shape of the cone or the actual inside cone shape?

Both, the ID changes from the tip to the exit of the muffler.

Originally Posted by Terse

Got any pictures of the header with the steps?

Originally Posted by Terse

What is the inner core diameter? 2.25", 2.5" ?

The Muffler core is 2.25" ID

Originally Posted by Terse

Sounds like a great pipe. I'd love to see it in a pipe test with other pipes.

Thanks a lot, It would be interesting to see how some of the newer pipes do against each other.

Originally Posted by Terse

What is the db with out the quite core disc's? 102-ish?

Almost, 105 Db.

[jaredp]

Here are both the maps for the Power commander Five and MSD blaster.

The Map on the Power Commander is for
Rossier Pipe
Free Air Kit

The MSD maps are as follows

Map 5
Pump Gas Racer

RE piston (PUMP GAS)
RE cams
RE pipe
RE Intake
NO FUEL ACCEL

Map 6
Pump Gas Racer

RE piston (PUMP GAS)
RE cams
RE pipe
RE Intake
With Fuel ACCEL

Map 7
Play Rider

RE Pipe
RE Intake
With Fuel ACCEL

Map 8
Play Rider

RE Pipe
RE Intake
NO FUEL ACCEL

[Terse]

Looks good.

[kb motorsports]

Jardp, Awesome information and thanks for posting your base maps a lot of companies like to force you to purchase something before showing a map now days.

[eagertorace]

it says the folder is invalid or corrupted (attached files)

[yfzjoe]

Originally Posted by eagertorace

it says the folder is invalid or corrupted (attached files)

They work for me.

[jaredp]

Originally Posted by kb motorsports

Jardp, Awesome information and thanks for posting your base maps a lot of companies like to force you to purchase something before showing a map now days.

The PCV map has been on our website since day one, we give out jetting specs there too. ROSSIER Engineering - YFZ450R Power Commander click on "HERE"for the PCV map if its not working here.

Originally Posted by eagertorace

it says the folder is invalid or corrupted (attached files)

Im not a webmaster by any means. I think all you have to do is save the zip file best to save it to your desktop then unzip the file. Then open it in the software.

I am unable to post the MSD file on our website , It should go up there the next time our website guy comes to the shop.

Originally Posted by yfzjoe

They work for me.

Great!

[RNL]

Hello, I bought a 2012 YFZ carb model. Will the pipes work on mine that are for the pre efi YFZ? Can I expect similar results? I know Yamaha changed the cam grind and ignition timing, I'm curious to whether this would lead to a different effect from purchasing an exhaust meant for the older quads.

[jaredp]

Originally Posted by RNL

Hello, I bought a 2012 YFZ carb model. Will the pipes work on mine that are for the pre efi YFZ?

We only offer one pipe for the YFZ's this pipe will fit all YFZ's YFZR's and the new carb'd YFZ.

Originally Posted by RNL

I know Yamaha changed the cam grind and ignition timing, I'm curious to whether this would lead to a different effect from purchasing an exhaust meant for the older quads. Can I expect similar results?

From a performance aspect, your quad uses steel valves compared to titanium for the R model. This would have a marginal effect on the engines' ability to rev quickly. Some tuning aspects would remain very close, as compression and exhaust should all be the same. Since our pipe hits a home run on the R, we would expect the power gains to be very much the same on the carbed model. Customers who have installed them on the newer carbed model have registered no complaints about power deficits.The only drawback we can see is that we haven't had a carbed version on our dyno, so we haven't yet got a dedicated jet kit to recommend.



Just to clarify, we only offer one pipe for the YFZ450. This is an updated pipe and makes 1 1/2 HP more than the previous pipe. Our exhaust system will fit any YFZ.

[RNL]

Originally Posted by jaredp

We only offer one pipe for the YFZ's this pipe will fit all YFZ's YFZR's and the new carb'd YFZ.



From a performance aspect, your quad uses steel valves compared to titanium for the R model. This would have a marginal effect on the engines' ability to rev quickly. Some tuning aspects would remain very close, as compression and exhaust should all be the same. Since our pipe hits a home run on the R, we would expect the power gains to be very much the same on the carbed model. Customers who have installed them on the newer carbed model have registered no complaints about power deficits.The only drawback we can see is that we haven't had a carbed version on our dyno, so we haven't yet got a dedicated jet kit to recommend.



Just to clarify, we only offer one pipe for the YFZ450. This is an updated pipe and makes 1 1/2 HP more than the previous pipe. Our exhaust system will fit any YFZ.

Thank you very much for the info.

[c_smith47]

where can i find a set of the black wheels with the blue beadlocks like the ones in the picture jaredp posted!

[ctown208]

Originally Posted by c_smith47

where can i find a set of the black wheels with the blue beadlocks like the ones in the picture jaredp posted!

they r hipers with blue beadrings. pm if u want a good deal

[RNL]

Would like to pick up one of these with the tax return cash, but really struggling to find any jetting info for the new YFZ. Starting to get frustrated.

[RNL]

I have not found a jet kit for the 2012 YFZ with the 42 mm BSR carb yet. There was a thread about the new carb, but I was looking for some more info with results. Rossier doesnt have any jetting recomendations for the new carb. I guess I'll wait and see. I have never done jetting before so I'm just being a little cautious, and nervous I guess.

[jaredp]

Originally Posted by ldjbuff

Tons of threads on jetting. I know Rossier sells a jet kit too, I am sure if you bought their pipe they would get you dialed in on jetting.

We do not sell a jet kit for the new '12 yet.

Originally Posted by RNL

I have not found a jet kit for the 2012 YFZ with the 42 mm BSR carb yet. There was a thread about the new carb, but I was looking for some more info with results. Rossier doesnt have any jetting recomendations for the new carb. I guess I'll wait and see. I have never done jetting before so I'm just being a little cautious, and nervous I guess.

We will work with you to get it dialed in with our pipe, please don't be afraid to give us a call.

[jaredp]

Here is an updated Map for the MSD blaster.

See notes in the MSD view software for mod list.