Exhaust Questions

Edited Date/Time 1/27/2012 11:07am
Having used numerous differant exhausts through my years of riding and racing. I have found that DR.D / Dubach Racing to have some of the best exhausts to use in durability, power, and sound levels.

If I were to try something else what are your thoughts on it with actual facts to try something new?
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DL
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11/11/2010 12:07pm
That's an easy answer.... PM me.
RACEGUY
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11/11/2010 12:28pm
You didn't tell us what you're fitting this pipe to, or how you like your power delivered.
nytsmaC
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11/11/2010 12:34pm
The best 4-stroke exhaust is a quiet one. Akrapovik seems to have figured out how to make good power while keeping the sound to a minimum.
ocscottie
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11/11/2010 12:45pm
Got Pipe?

This guy does Cool

The Shop

mxb2
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11/11/2010 12:49pm
Budget ?, What kind of bike?
11/11/2010 12:57pm
Oh ya Yamaha 450 sorry! I just want to hear what you guys think tell me your pros and cons to them being your preferances.

Do you have an ideas what that Akropovic tests at sound wise? I know that DR.D offers inserts and 96 db pipes. Do you know how long it will stay quiet will packing be bad after 1 -3 rides then I need to re-pack it?
newmann
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11/11/2010 1:03pm
The 450 isn't fast enough stock? Add a tooth to the rear then. Unless you just feel the need to pay the $1300.00 for the Akrapovic...........
mxb2
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11/11/2010 1:05pm
newmann wrote:
The 450 isn't fast enough stock? Add a tooth to the rear then. Unless you just feel the need to pay the $1300.00 for the Akrapovic...........
What year? FMF and DR D make real good stuff for the yamahas! Don t listen to the haters , its your money to spend anyway you want!
mxb2
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11/11/2010 1:07pm
Oh ya Yamaha 450 sorry! I just want to hear what you guys think tell me your pros and cons to them being your preferances. Do...
Oh ya Yamaha 450 sorry! I just want to hear what you guys think tell me your pros and cons to them being your preferances.

Do you have an ideas what that Akropovic tests at sound wise? I know that DR.D offers inserts and 96 db pipes. Do you know how long it will stay quiet will packing be bad after 1 -3 rides then I need to re-pack it?
Dirt Rider had a exhaust comparison a couple months back, Noise, weight, price ETC!
mxboi991
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11/11/2010 1:22pm Edited Date/Time 11/11/2010 1:27pm
newmann wrote:
The 450 isn't fast enough stock? Add a tooth to the rear then. Unless you just feel the need to pay the $1300.00 for the Akrapovic...........
Thats the dummest thing i ever heard, his bike could be lacking power top end somewhere, mabey he wants his bike to look raw unlike that yellow twinky thing in your picture, mabey hes fast enough to wear he needs new exhast!!!!!!


BTW BRO GET THE FMF FACTORY 4.1 SYSTEM KIT!! ITS ON SALE NOW ALL 4 STROKE EXHAST FOR FMF!! $679!! COMES WITH FMF MEGA BOMB HEADER IN TITANIUM AND FMF FACTORY 4.1 EXHAST WITH 94db INSERT WHICH IS AMA QUALIFICATIONS!! ALSO FOR NO EXTRA CHARGE YOU CAN GET THE EXHAST IN ANO BLUE, WOULD LOOK RAW ON A YAMAHA PLUS FACTORY SAN MANUEL YAMAHA USES THIS SET UP SO YOOU KNOW ITS GOOD!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Smile IM GETTING THIS FOR MY KAW 250F!! AND NO IM NOT PUTTING AN EXTRA TOOTH ON IT THE SPROCKET! Smile HERES THE LINK http://www.fmfracing.com/Products/MX/281
newmann
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11/11/2010 2:53pm
newmann wrote:
The 450 isn't fast enough stock? Add a tooth to the rear then. Unless you just feel the need to pay the $1300.00 for the Akrapovic...........
mxboi991 wrote:
Thats the dummest thing i ever heard, his bike could be lacking power top end somewhere, mabey he wants his bike to look raw unlike that...
Thats the dummest thing i ever heard, his bike could be lacking power top end somewhere, mabey he wants his bike to look raw unlike that yellow twinky thing in your picture, mabey hes fast enough to wear he needs new exhast!!!!!!


BTW BRO GET THE FMF FACTORY 4.1 SYSTEM KIT!! ITS ON SALE NOW ALL 4 STROKE EXHAST FOR FMF!! $679!! COMES WITH FMF MEGA BOMB HEADER IN TITANIUM AND FMF FACTORY 4.1 EXHAST WITH 94db INSERT WHICH IS AMA QUALIFICATIONS!! ALSO FOR NO EXTRA CHARGE YOU CAN GET THE EXHAST IN ANO BLUE, WOULD LOOK RAW ON A YAMAHA PLUS FACTORY SAN MANUEL YAMAHA USES THIS SET UP SO YOOU KNOW ITS GOOD!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Smile IM GETTING THIS FOR MY KAW 250F!! AND NO IM NOT PUTTING AN EXTRA TOOTH ON IT THE SPROCKET! Smile HERES THE LINK http://www.fmfracing.com/Products/MX/281
"his bike could be lacking power top end somewhere" Wow, the more I read that the less sense it makes. A 450 has a buttload of hp and torque. A pipe on it will usually shift the power around moreso than increasing peak numbers. Mild gearing changes can often accomplish the same thing. Hell, I think Tim Ferry added seven teeth to the rear of his factory Yamaha race bike for SX. Just depends on exactly what you are trying to accomplish which he didn't tell us. He came in hear with his first post asking for factual pipe info after numerous years of riding and racing with different pipes.Didn't even bother to tell anyone what bike he had. He did sing some praises for Dubach. Do you know who Dubach is? A little more info probably would have gotten him some better answers. And your advertisement for the FMF didn't tell him anything he wanted to know either. About San Manuel, they are SX only.....maybe he doesn't ride SX?


Oh, Twinky bike has the real raw goods on it. Sweetest pipe on the planet still didn't make the old piece of shit much better. But for $379.00 for a hand built pipe and silencer it really looks raw. Makes the whole bike look raw I guess?

11/11/2010 3:26pm
Newman wow that was a lot of info! I didnt state what I was riding because I wanted to hear what people thought. Yes I did forget to add what bike my bad oops! With people telling me what they like so that I would get replies on all aspects of riding and racing. Plus I could give some argument as to why I wouldnt want to not use a DR.D system anymore also.

So I would like to hear valid reasons what everyone thinks is better and why? Thank you!

San Manuel left Akropovic? Since when?
nytsmaC
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11/11/2010 3:36pm
mxboi991 doesn't know shit. Who really cares what exhaust any of the teams use, it's not the same stuff available to the public anyways.

newmann is right about a $60 sprocket making a bigger "improvement" than a $800 exhaust for most of us spodes.
hurtssogood
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11/12/2010 7:54am
ROCKET EXHAUST!!!

buggz
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11/12/2010 8:33am
DL wrote:
That's an easy answer.... PM me.
Do you have anything for the 2010 YZ450?
DL
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11/12/2010 8:40am
DL wrote:
That's an easy answer.... PM me.
buggz wrote:
Do you have anything for the 2010 YZ450?
Yes, in stock. In addition we can custom build the muffler length and core diameter to meet your specific needs. I'm the little guy so I have to be agressive with quality, performance, customization, price and warranty. You can email me at don@rocketexhaust.com I have a special offer I can tell you about.
11/12/2010 11:24am
nytsma c I hear what your saying on the sprocket making a differance but how often does anyone go out and buy a Ti-Ti system? A rear sprocket and a exhasut will make drastic changes but I still havent heard any good arguements as to why I should try something new. Im still leaning towwards what I know at Dubach.

DL what are your special offers? I know what I have gotten in quality from DR.D and what extra accessories they have to offer me other than just exhausts. What makes yours better? How long will the system last before having to refurb it?
DL
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11/12/2010 11:40am
nytsma c I hear what your saying on the sprocket making a differance but how often does anyone go out and buy a Ti-Ti system? A...
nytsma c I hear what your saying on the sprocket making a differance but how often does anyone go out and buy a Ti-Ti system? A rear sprocket and a exhasut will make drastic changes but I still havent heard any good arguements as to why I should try something new. Im still leaning towwards what I know at Dubach.

DL what are your special offers? I know what I have gotten in quality from DR.D and what extra accessories they have to offer me other than just exhausts. What makes yours better? How long will the system last before having to refurb it?
Singledoubles, I think you live in Murrieta.... The shop is in Elsinore right off of central ave. You are welcome to come by anytime. To answer some of your questions.....
1. Hanger Bracket- it's replaceable and moveable allowing a happier fit on a bike that's been tweaked.
2. Mid Pipe to Muffler- slip fit with a longer engagement..... leak free and rotates providing a perfect fit.
3. Refurb- we use Silent Sport packing which is regarded as the best and longest lasting. Repacking intervals vary per rider but we provide for easy packing while on the bike cause our outlet cap is easily removed thus allowing access to the back of the muffler. Just push the good packing in towards the front of the muffler where it's been deterorating and put some new packing in the empty space at the back. This takes under 5 minutes.
4.Custom Mufflers- you can pick your muffler length and core diameter. We have AMA and FIM 94 db systems available (very different spec and performance)
5. Vital member discounts- please PM me...... keep in miind that our regular retail price is $399 for a full sysytem (stainless head pipe/aluminum muffler). I also offer a money back guarntee.

My email is don@rocketexhaust.com
newmann
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11/12/2010 1:31pm Edited Date/Time 11/12/2010 1:38pm
Sounds like Don at Rocket will build you a pipe to perform better where you want it to perform better, not where DrD thinks it needs to perform better. Great price too.That said, I can't think of too many people better for testing a pipe on a Yamaha 4 stroke than Doug Dubach.

The only reason I can think of for getting a Ti/Ti exhaust is for weight savings and that's pretty much a lost cause on the 450's. Can see that being a more viable choice for a 250F. The first Ti exhaust I got was back in 2001 for my YZ250F. DSP full Ti SX exhaust system knocked nearly three pounds off over the stocker plus added between 2-3 hp throughout the rpm range. The first YZ250F had a seriously detuned pipe for some reason, probably to prevent it from being protested more than it was against the 125's. I had the DSP pipe on my bike less than thirty minutes before the weld seam on the can blew apart and chunks of titanium started flying. They warranted it, claiming a defect in the welding process caused the ti to get brittle. Couple years later, someone rubbed me a little in a corner on the muffler and tweaked it over a small amount. Wouldn't have been a big deal if it hadn't have gotten caved in from the caliper hitting it on the next jump.
11/15/2010 10:48am
Thanks for all the input Don! I have seen Doug out testing at the local tracks out here and on all manufacturers bikes. Thats what makes me so pro DR.D,

I like the Ti systems for weight but not so much for anything other than some SX riding.

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