First impression on my 2010

I am completely with you there. The standard pipes, as you gave the prime example, are ridiculously loud at full throttle. No doubt your pipes pass the new testing requirements. I would like your opinion though on the new testing standards, as there are so many varying factors that affect results, from temperature, humidity levels to overcast skies, and echoing off surrounding structures. Do you see the new testing being successful? It seems a very GREY area of any motorsport.

the 2 meter max test is exactly how these bikes should have been checked from day one , it removes all the variables involved and lets you see what the bike is going to sound like when its on the track with the throttle pinned , the varying factors are not gonig to make a quiet bike loud or a loud bike quiet , the 20" test is a complete waste of time unless you want to inforce a db limit in the pits where bikes are idleing around

Slip-on. Dave states that his testing shows no reason to replace the factory header.

Weight would be a great reason :smirk:

What kind of testing was done in regards to this? Is there a link to this test?

The details would be available by contacting Dave at the link I posted to MRD. My understanding is that in experimenting with headers for the '10, the one that performed best was a dimensional duplicate of the factory header.

reducing the weight of an exhaust system is far more noticable durability wise than say making the bike feel lighter , IMO the exhaust system is the last place you want to use thin light weight materials because of the heat cycles and vibration that cause the material to fatigue and crack or break , I know I know the pros run them , but what they dont do is run them more than a couple hrs. lucky for the light weight pipe builders most guys dont ride hard or long enough to have them fail in short notice. the way I build them they take a beating for a long time

as far as testing , I measured the stock header and found it to be the same dimentions I would build for a good overall header so I looked at the muffler and found a reducer with a square shoulder that would cause excess sound wave reversion that hampers the incoming charge of AF on overlap , so I built a muffler to the dimentions I thought would boost overall power and ran them both on the dyno back to back , the the stocker made less power across the range , the increase with my slipon was enough that I knew there was not going to be any significant gain changing the header around

Slip-on. Dave states that his testing shows no reason to replace the factory header.

I hear ya, finally. I used to sped big $$ on a pipe, only to sell the bike a year later. got tired of doing that, and bought a $300 Yosh R4 slip on.

removed the spark arrestor core, Tried it out yesterday, and it ripps!

Only draw back, its a little heavier than stock(a few ounces, not much)

Strange thing is, i thought a weaker power was supposed to make your bike easier to ride? When i put the yosh on, it had more power everywhere, and made the bike easier to ride because power was there no matter what rpm, when you needed it. no need to re-gear either. still on the stock map, havent tried to remap yet.

It also allowed me to break the rear wheel loose when i wanted to. controlled slides, easy as pie.

I can immagine the MRD must be awesome too.

What are the approximate power gains (HP & Torque) with the MRD slip-on compared to stock ?

Does the MRD slip-on require a re-map ??

Sounds like a slip on is def the way to go if you want the same power as the 1000$ system but don't care about the weight savings.

the stock muffler is huge so anybodys slipon should be lighter , just not as light as replacing the header with TI , IMO the weight diff. of an exhaust system can not be felt by the rider , its not like 10 or 15 lbs that you could feel , its like 2 lbs diff. on a 220 lb bike , nobody can feel that diff. when your trying to go through a rough turn as fast as you can with out falling :excuseme:

the stock muffler is huge so anybodys slipon should be lighter , just not as light as replacing the header with TI , IMO the weight diff. of an exhaust system can not be felt by the rider , its not like 10 or 15 lbs that you could feel , its like 2 lbs diff. on a 220 lb bike , nobody can feel that diff. when your trying to go through a rough turn as fast as you can with out falling :excuseme:

Can you post a pic of your slip on for the 2010??

Is it a pro comp style or standard?

I checked your website and your work looks amazing, would like to see a full pic of the can for the 2010 though. 279.99 is 120$ less expensive than the yosh, so I'm very interested, as I'm sure others here are too!

Can you post a pic of your slip on for the 2010??

Is it a pro comp style or standard?

I checked your website and your work looks amazing, would like to see a full pic of the can for the 2010 though. 279.99 is 120$ less expensive than the yosh, so I'm very interested, as I'm sure others here are too!

its prolly lighter than the yosh too.

pic is on page 2

What are the approximate power gains (HP & Torque) with the MRD slip-on compared to stock ?

Does the MRD slip-on require a re-map ??

damn, I want one!!! Looks friggen slick, good price, good performance, really really hard to say no to something like this.

MRD You have any problems shipping to canada?

damn, I want one!!! Looks friggen slick, good price, good performance, really really hard to say no to something like this.

MRD You have any problems shipping to canada?

that pic is from Canada :excuseme:

Raced again this weekend out at Racetown 395.

All I can say now is WoW!!!!! I love this bike.

Got the suspension set up by ENZO............added a Yosh pipe I stole for 299.00...Full system........ and raced 3 motos sat. and 2 on sunday.

Nothing more to say...except.....just to make sure....I did a practice on my buddies 2010 KX 450........About 2 laps in I was really smiling...that Kawi is a pile.:excuseme:

oh yeah..went up one tooth on the rear sprocket......Awesome bike. kEEPS GETTING BETTER AND BETTER.

Well 40 Hours on the clock and what a awsome ride! Went to the track on sunday and rode a 2010 Suzuki 450 and my buddy rode mine and we both think the Yamaha is way better motor Sus turning feels way lighter . I have a DR,D full system and his is stock but the suzuki feels 20# heaver BEST Bike ever

Keep us up-dated! I am using this time while I heal to research what others are doing with their '10-'11. Hopefully I'll be able to step onto a fully prepped bike when I can ride next season.

yea i rode the new kawi also, diddent care for it at all. and the power band to me feels like a 2 stroke, it dosent seem to have alot of torque

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