V4 + FULL AKRA noise emission

01COCCOBET · Aug 26, 2019

Hello everyone,
I am writing because in the Italian tracks it is getting harder and harder to drive our beauty with the noise restrictions.
I installed the full Akra with the db killer V.01 fitted.
I am far from acceptable.
Our limits is 105 db +/- 1.
I make 109.
With some escamotage I can barely get 107.
Sometimes the tester close an eye(due to the beauty in front of him),but sometimes not.
I am aware of the db killer V.02 with a kind of new restricted design(I have some pictures),but it is still not very gentle with the Phonometer 107.
Do you have similar problem and more importantly any good solution(a part to reinstall the std exhaust)?
Anyone using the Akra UpMap with the std exhaust?
Any issue on that?

realnuts · Aug 26, 2019

in Belgium, we have a 98dB limit
The only thing that works here, is this:
https://www.racing4fun.de/markt/details/200952.html

RP exhaust for V4. It is fugly, but it is the only way to race here.
This fits on the full akra lines

01COCCOBET · Aug 26, 2019

realnuts said:
in Belgium, we have a 98dB limit
The only thing that works here, is this:
https://www.racing4fun.de/markt/details/200952.html

RP exhaust for V4. It is fugly, but it is the only way to race here.
This fits on the full akra lines

It looks very vintage(like the old HONDA VTR SP2 or Yamaha R7).
I like it,but weight wise,and power wise,what are the loses?
It seems 3 kg extra,at least.
I am wondering if the Original Std exhaust with the AKRA MAP could solve it(good power with acceptable noise).
I am sure a valve would solve everything

reganc · Aug 26, 2019

this is why i'm looking forward to electric,being able to ride tracks and not have to worry about this nonsense. Even with a stock exhaust this bike is too loud for some tracks.

JHTmcrider · Aug 26, 2019

Battery bikes? Lol

01COCCOBET · Aug 26, 2019

reganc said:
this is why i'm looking forward to electric,being able to ride tracks and not have to worry about this nonsense. Even with a stock exhaust this bike is too loud for some tracks.

sorry,but I am not ready....yet

JHTmcrider · Aug 26, 2019

Just read yesterday that the German's studied the pollution put off by battery cars is higher than a diesel car. This battery "revolution" is a scam at least while the government subsidies are in play. Once they pull the subsidies, then the incentive to buy an electric car/ bike are gone.

They are banning eBikes from the trails in Colorado, and seriously, watching someone on an eBicycle is just plain stupid looking.

01COCCOBET · Aug 27, 2019

so anybody tried the Akra UPMAP with stock exhaust on the Dyno?

I wish I was able to do it

tifosi1299 · Aug 27, 2019

Race bike that can't be used on track?

AndreiD · Aug 27, 2019

realnuts said:
in Belgium, we have a 98dB limit
The only thing that works here, is this:
https://www.racing4fun.de/markt/details/200952.html

RP exhaust for V4. It is fugly, but it is the only way to race here.
This fits on the full akra lines

Holy crap! What the ....... .... is that? It's like a weird fetish of under-seat phallus

AndreiD · Aug 27, 2019

tifosi1299 said:
Race bike that can't be used on track?

I know right?! I mean those track marshals are way too anal about it! It's not like a Kawasaki H2R

01COCCOBET · Aug 27, 2019

Anal is a compliment

ah ah

V4 + FULL AKRA noise emission

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