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Discussion Starter #1
Two Brother's Racing has presented a proposal for a R3 after-market exhaust. It's a carbon fiber shorty can that is coated in Teflon with an end cap made from lightweight magnesium.

There is also a rubber-lined stylish mount that comes standard. The exhaust has a spiral-wound perforated core, CNC machined aluminium outlet and stamped, sturdy spring-fit inlet.

The sad thing is that this exhaust won't really improve performance much. The TBR exhaust only adds 0.77 hp to the peak power figure. Torque is improved by 0.92 lb-ft at 3,800 rpm, and the weight of the bike is reduced by 6 lbs. So really you are buying the exhaust for the look and the exhaust note, with performance running a distant third.










http://www.autoevolution.com/news/y...performance-is-modest-video-95330.html#agal_0
 

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All the slip-ons won't improve the hp's on your bike. As far as i've seen they just provide you another 1/1.5 hp max. If you want the looks and a slightly different appearence you'll be okay with a slip on. I think my R3 sounds even friendlier than my 50cc oldtimer with the stock exhaust. Yoshimura comes with a full system (R77), akrapovic comes with a full system for the SS and two brothers is also in available in a couple of months. I'll go for the R77 full system. No cat, no muffler but for a 321cc motorbike it'll provide just the right gains and sound if you ask me.
 

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I'm also eyeing the Yoshi R77 full exhaust in carbon, but that requires some type of piggyback which means more $$.

Ideally, I'd like to get just the slip-on in carbon first (for looks and sound) and the remaining piping later on. Is that an option?
 

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Ofcourse that's an option! You won't see much difference between just a Yoshi slip-on and a full system. Allthough it's illegal to ride without a CC and without a DB killer, the sound of a full system on a 300cc bike is a world of difference. Costs is about 290$ difference.
 

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Discussion Starter #5
I do think this can looks better than the stock one. Not sure if I would really buy one without having much performance gains. Sure it would look nice, but I'm just not sure if I think that it is worth the money. Exhaust note also sounds nice though. I suppose it all comes down to how much it costs.
 

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Ofcourse that's an option! You won't see much difference between just a Yoshi slip-on and a full system. Allthough it's illegal to ride without a CC and without a DB killer, the sound of a full system on a 300cc bike is a world of difference. Costs is about 290$ difference.
I was trying to find a Yoshimura slip-on but didn't see anything anywhere. Then the Yoshimura R77 full race exhaust system just got released so I purchased it. Might have to ride around without a fuel controller for now. Price difference between that and the Akrapovic slip on in carbon is only about $125.

FYI I got the Yoshi R77 exhaust from Revzilla. I asked them to price match Sport Bike Track Gear's price. Hopefully will have it by tomorrow or Friday.
 

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Gratz on your purchase. I'd be nice if you share your thoughts about the r77 system. ?
 

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I think some of you are missing the point by what Two Brothers is doing. Does flush mount turning lights improve performance? Does a fender replacement help performance? In fact the Two Brothers does improvement performance by allowing the engine to breathe properly by not restricting the exhaust and improve both HP and Torque, then that's extra. What we buy a slip on for is the beauty, sound and street cred.
 

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I was trying to find a Yoshimura slip-on but didn't see anything anywhere. Then the Yoshimura R77 full race exhaust system just got released so I purchased it. Might have to ride around without a fuel controller for now. Price difference between that and the Akrapovic slip on in carbon is only about $125.

FYI I got the Yoshi R77 exhaust from Revzilla. I asked them to price match Sport Bike Track Gear's price. Hopefully will have it by tomorrow or Friday.
do you have a link for the r77 on revzilla. i couldnt find it
 

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Is the yoshimura R-77 full exhaust system legal to use on the road in the UK and europe?


Yosh full exhaust is designated "Race Only" and is not generally 'street legal'. It really just depends on your local jurisdiction's level of enforcement. I saw somewhere that you cannot get a MOT in the UK with anything other than stock equipment, so I'd say no.


And they are available...
 

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TBR made a full system for the r3 already, 2.05 hp gain and minus 11 pounds of weight. It looks great, but I wish they had chrome version since the r3 I'm getting is blue and silver so i need a silver exhaust to match to foot pegs.
 

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It looks like the TBR full system removes the cat completely... Wouldn't that make it mandatory to get a custom tune? I think the Yoshi full system utilizes a cat still.
 

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The sad thing is that this exhaust won't really improve performance much.
There is no magic in one company's slip on versus another. Just that some companies are more honest at measuring it than others. The factory muffler is very efficient on the R3 since the cat is in the pipe. Changing the slip on to ANY aftermarket loud muffler might give a 3% increase. A complete exhaust and a fuel tuner can give 10% if you really want to put another $1100 into the bike.
 
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