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Post Info TOPIC: Bike is running loud (80 Db on idle)


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Bike is running loud (80 Db on idle)
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Hello,

My bike was always loud and today I've decided to meassure Db with a phone. On idle has it shown 80 Db on 20-25% trottle 105db :/. According to spec should it be 79Db for 3500RPM. I was looking for some info what to do or what can be the cause in google. What I have learned - this kind of muffler shouldn't have replacable stuffing. Is it correct? What can be the reason for the noise other than used muffler? Should I buy a new or something else can be a reason or solution. The noise is really tiring and is causing issues with MOT. 

I have used guidelines for meassurment. I'm not sure how phone is accurate but according to youtube is quite accurate :).

Since I've bought my bike I haven't done any modification.  Previous owner shortened the exhaust pipe. My bike was produced in 2001.

Thank you in advance for any info.

Rafal



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You are correct that the standard muffler does not have any replaceable packing material. If the previous owner shortened the pipe, there is a high possibility he removed much of the metal baffle inside as well, trying to get more free-flow.
Most of the aftermarket mufflers are louder than the original Yamaha one.

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My TTR had the internal restrictor removed during the Pre delivery, I have a aftermarket Staintune muffler & it's rated at 94db @ 3500rpm so it meets the Australian standards...it seems loud @ 94db so perhaps the phone is not reading it right

Rds Terry

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