Yamamoto noisy system

[skinnydog0_0]

Hi all,
I have a yamamoto 3/4 system, Graeme france carbon end can with baffle, ram air and no quitening gears. I have tested the noise level and with the baffle it is running at 103 dB's and without the baffle its 107dB's
I had a standard system with a micron race can and that was doing 102dB's
I am guessing the noise level is down to the quietning gears and not running the foam on the inside of the fairing and under the tank. I was hoping to do streetstock aswell next year but i am never going to get past the scruts with 103dB's
Has anyone had to deal with this before?
Any advice much appreciated

[Neosophist]

The quitening gears only take up slack in the valve train, they shouldn't change the exhaust noise, neither should removing the foam under the tank, I believe this is only to insulate from heat.

Maybe just loud cans.. get a quieter can :D

[reverse cylinder jim]

Having the same sort of problems. The bike was always 102db with a TSR half system and Micron can but since ive removed the Quitening gears and running open carbs it was at 106db last out at Oulton
Ive put in a db killer and that has taken it down to 102db again but i swear its not as fast and is restricting it alot.
Running the open carbs has really changed the exhaust note around the 8 grand mark on mine where they want the revs to be when noise testing.

[hunter]

Removing the gears makes no difference to the db,but more air in is more noise out.
try a different baffle.

[skinnydog0_0]

Thanks for teh replies, i have re-made a JMCA carbon kevlar endcan that i had with the yamamoto, this one has a narrow 1 1/4" section about half way through and almost to teh outlet. I am guessing this may help.
If i cant get it down below the 98dB limit i will just have to forfeit teh points from the streetstock
Still the more tracktime i can get teh better.

@Neo
Did you get any pics of Itos' bike?????????????

[Neosophist]

I didn't but maybe one of my friends did, i'll check