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Old 01-15-2019, 05:16 PM   #16
Frame Maker
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Originally Posted by TheRiddler View Post

If it's too loud, it's too loud...
Yes, of course. This I'd expect.

Quote:
Originally Posted by TheRiddler View Post

... I have stopped a grand total of one motorcycle for an excessively loud exhaust.... I estimate it could be heard 2 miles away.

And he got a warning, so there's that.

Thanks for the reply
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Old 01-15-2019, 11:09 PM   #17
JMardy
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Originally Posted by Frame Maker View Post
I understand if it is loud, game over. But what if its not loud, yet still catches the attention of a LEO (who thinks it doesn't look like OEM equipment)?
Like "WHERE ARE YOUR FORKS?"
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Old 01-16-2019, 10:16 AM   #18
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Like "WHERE ARE YOUR FORKS?"
Ya, I wonder if that would be an equipment violation...
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Old 01-16-2019, 12:58 PM   #19
orbframe
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I donít have an answer for you, but please post more images of the 2-stroke and itís alternative front end.
motoporn is always welcome in all forums
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Old 01-25-2019, 12:44 AM   #20
rudolfs001
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Got tired of all the misinformed articles, youtube videos, and facebook comments, so I decided to go read the relevant vehicle codes. Here's what I found (feel free to add it to your OP):

TL;DR: the noise limit is a measly 80 dB, unless your bike is older than 1985, then the limit is a bit higher

There are a couple vehicle codes that reference vague language such as
27150: "Every motor vehicle subject to registration shall at all times be equipped with an adequate muffler in constant operation and properly maintained to prevent any excessive or unusual noise, and no muffler or exhaust system shall be equipped with a cutout, bypass, or similar device."
27151(b): "For the purposes of exhaust systems installed on motor vehicles with a manufacturer’s gross vehicle weight rating of less than 6,000 pounds, other than motorcycles, a sound level of 95 dbA or less, when tested in accordance with Society of Automotive Engineers Standard J1169 May 1998, complies with this section. Motor vehicle exhaust systems or parts thereof include, but are not limited to, nonoriginal exhaust equipment."

These are the sections with the most concrete info:

CA Vehicle Code Section 27151
https://leginfo.legislature.ca.gov/f...ctionNum=27151
(a) No person shall modify the exhaust system of a motor vehicle in a manner which will amplify or increase the noise emitted by the motor of the vehicle so that the vehicle is not in compliance with the provisions of Section 27150 or exceeds the noise limits established for the type of vehicle in Article 2.5 (commencing with Section 27200). No person shall operate a motor vehicle with an exhaust system so modified.

CA Vehicle Code Section 27202
https://leginfo.legislature.ca.gov/f...ctionNum=27202
For the purposes of Section 27200, the following noise limits shall apply to any motorcycle, other than a motor-driven cycle, manufactured:
(1) After 1969, and before 1973 ... 88 dbA
(2) After 1972, and before 1975 ... 86 dbA
(3) After 1974, and before 1986 ... 83 dbA
(4) After 1985 ... 80 dbA
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