The Akrapovic Thread

58484 Views 159 Replies 60 Participants Last post by hey_tchap, Jun 28, 2017

Stirz

Discussion Starter · May 24, 2015

According to Akrapovic and some on-line sellers, the full exhaust is available - but - no one seems to actually have any in stock or can provide a firm delivery date. Anyone have a line on a vendor that has these (need within next three weeks if at all possible)?

Thanks

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FangShui

· #2 · May 24, 2015

Stirz said:
According to Akrapovic and some on-line sellers, the full exhaust is available - but - no one seems to actually have any in stock or can provide a firm delivery date. Anyone have a line on a vendor that has these (need within next three weeks if at all possible)?

Thanks

You could check with these guys. They're in British Columbia, Canada but have a warehouse in Washington.

The full system is listed on their site, but no indication of whether it's actually in stock or just a pre-order.

http://www.motostarz.com/filter-by-...ll-exhaust-system-for-2015-yamaha-yzf-r3.html

Phone # is 604.370.4899

Stirz

Discussion Starter · #3 · May 24, 2015 (Edited)

Listed as "backordered", thanks though. Same with Chaos Theory unfortunately (Jesse was very responsive). My local guy tells me the US Distributor for Akrapovic doesn't even have a stock number for these yet...

I really don't want to start cutting up the stock pipes yet, so may just run a good 10 lb. of extra metal until full race systems are available.

t-rav_12

· #4 · May 25, 2015

Already payed for mine through Chaos Theory... Like you said, we're still waiting. But when they DO come in, we'll be first in line. Props to Jesse!! Hurry up, bro!

Norton-Motorsports.com

· #5 · May 30, 2015

Dyno Tuning Results and fuel maps from Bazzaz for Akrapovic Slipon and Full System

I have uploaded all of our dyno testing and tuning results as well as Bazzaz Z-Fi fuel maps for the stock R3, Akrapovic slipon exhaust, and full system exhaust.

Enjoy! And feel free to ask questions

http://www.yamahar3racing.com/2015/05/yamaha-r3-dyno-results-with-akrapovic-full-system-slip-on-and-stock-exhaust-tuned-with-bazzaz-zfi/

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Reactions: 5

FangShui

· #6 · May 30, 2015

Great information.

Thanks for this posting, and all your others, too!

Norton-Motorsports.com

· #7 · May 30, 2015

The numbers are a bit lower than I've heard from others on different dynos, but the gain percentages are the important thing to look at.

wthenshaw

· #8 · May 30, 2015

How come other dynos are showing numbers like 37hp stock and yet yours so far under the claimed 42hp?

Reactions: 1

Norton-Motorsports.com

· #9 · May 30, 2015

It's hard to say exactly, all dynos will report slightly different numbers and be calibrated differently, plus temperature, elevation, weather, all affect readings. I was a little surprised to see them so low, but it's all relative, that's why we did all the tests on the same dyno with the same bike. We saw a 6.4% gain over stock with a full system and Bazzaz Zfi, so if you did these tests on a dyno that measured stock at 37, you could expect to see 39.4 with the full system. Make sense?

42hp is claimed at the crank, which will always be higher than at the wheel...

u3c307

· #10 · May 31, 2015

Thanks JBlue for post!

bradmeister

· #11 · May 31, 2015

Evidentially,

The Yami does not like the Akrapovic......... Dropping that kind of Money for what is that a 3HP increase? No thank you.

The BHP looks smoother than the stock Dyno Maps I have seen....... But unless your a pro racer, I doubt the common street rider will feel the difference at the rear wheel for the Money.

Lets let Yoshi, Dr. D, Two Brothers or someone else do the R&D for the aftermarket exhaust system............ I opine its too early for a Pipe and/or Fuel Commander or similar map mod.

Springs and Sprockets are the way to go for now.....and shorty levers! Woot Woot!

Cheers

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Anthony

· #12 · May 31, 2015

Ah, I knew this name looked familiar! Just bought an Akrapovic slip-on exhaust from you earlier today, I can not wait to get that thing in the mail, you have no idea!

Reactions: 1

Norton-Motorsports.com

· #13 · May 31, 2015

It's pretty typical to see around a 10% gain on most modern sport bikes by adding a full exhaust system and fuel controller, but most modern sport bikes also have ram air and the R3 does not. These tests were also all done with the stock snorkel in the airbox since that's how I have to race the bike in the supersport class at CVMA, so there's definitely a little more room to gain by removing the snorkel and possibly by changing the air filter once an aftermarket option is available.

And yeah, it's a lot of money for what seems like a small gain, but when you're racing, tenths of a second count, and a 10%, or even 6% horsepower advantage or disadvantage can be huge.

I'm very anxious to see how the exhausts from other manufacturers do, I'm planning another test as soon as I can to compare the Yoshi full system, a modified stock system with the catalytic converter removed, and I want to test the system that Spears Enterprises is developing. I don't expect too much difference between them, but we'll see.

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3th3r

· #14 · May 31, 2015 (Edited)

Thanks for the hard work, Jesse. Bikes nowadays come very well tuned from the factory to extract every HP available from every drop of fuel, while still being able to meet air quality restrictions, so a 6.4% improvement is realistic.
As far as the cost-benefit of a full system not being worth it, well, it may not be not worth it to some, but it's worth it to others, as Jesse poignantly explained above.

Stirz

Discussion Starter · #15 · May 31, 2015

jbluetooth said:
And yeah, it's a lot of money for what seems like a small gain, but when you're racing, tenths of a second count, and a 10%, or even 6% horsepower advantage or disadvantage can be huge.
.

The aftermarket full system weight savings alone is worth the effort on a race bike....that cat is a boat anchor. A full race exhaust for half the cost of a R1 system still isn't cheap, but not bad really (opinions may vary, no warranty expressed or implied, use at own risk)

Thanks for posting up dyno results -

BJAS1961

· #16 · May 31, 2015

It is useful work baselining a stock R3, and with very early development modifications; thanks for doing it, and for sharing the results.

No doubt as experience with the bike builds, developers will maximise what gains there are to be had out the bike with various levels of modifications.

Mase

· #17 · Jun 1, 2015

I come from a car world and there, a 6.4% power increase is no small thing. That's a little 200hp car going to 212.8hp. That's a difference you can feel, even on the street. I can't see why that would be different on a motorcycle. You're also losing significant weight which will also increase performance in every direction.

bradmeister said:
Evidentially,

The Yami does not like the Akrapovic......... Dropping that kind of Money for what is that a 3HP increase? No thank you.

The BHP looks smoother than the stock Dyno Maps I have seen....... But unless your a pro racer, I doubt the common street rider will feel the difference at the rear wheel for the Money.

Mike-the-Bike

· #18 · Jun 1, 2015

After weeks of searching online for the Akrapovic slip-on and seeing "out of stock" or super high prices, I finally decided to roll the dice today, and ordered it from a company in Italy for $254.00 shipped to Atlanta. It was on sale for $210.00 (USD) plus $44.00 express shipping to the US. The euro is only worth .89 cents, down from about $1.45 last year.

Norton-Motorsports.com

· #19 · Jun 1, 2015

Some more info...
I asked Del at Bazzaz about the difference in the dyno numbers and this was his response:

"Jesse,
A dyno jet dyno will read high due to their dyno calculating what is being made at the crank and not at the rear wheel like the Bazzaz dyno. If I turn the Bazzaz dyno to show what is being made at the crank then yes it will certainly read 36-37 but due to motor wear, chain slack/chain & sprocket wear some of that will be loss once it gets to the ground so instead Bazzaz prefers to know what is being made at the rear wheel as that is a useful number knowing what is exactly being put to the ground.

Bazzaz uses its own Bazzaz Principia dyno.

Best Regards,

Del Edlefsen
R&D Technician"

I thought the Cycleworld reading was a measurement at the wheel, and the rated HP at the crank was 42, but I could be mistaken.

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D1CE

· #20 · Jun 2, 2015

jbluetooth said:
Some more info...
I asked Del at Bazzaz about the difference in the dyno numbers and this was his response:

"Jesse,
A dyno jet dyno will read high due to their dyno calculating what is being made at the crank and not at the rear wheel like the Bazzaz dyno. If I turn the Bazzaz dyno to show what is being made at the crank then yes it will certainly read 36-37 but due to motor wear, chain slack/chain & sprocket wear some of that will be loss once it gets to the ground so instead Bazzaz prefers to know what is being made at the rear wheel as that is a useful number knowing what is exactly being put to the ground.

Bazzaz uses its own Bazzaz Principia dyno.

Best Regards,

Del Edlefsen
R&D Technician"

I thought the Cycleworld reading was a measurement at the wheel, and the rated HP at the crank was 42, but I could be mistaken.

I'm pretty sure CW dyno reading was at the wheel. 42 BHP with drivetrain loss gives around 37 whp. I'm under impression the Brazzaz dyno needs calibration or gearing issue.

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