Mtn-Track
Extreme
Colorado Senate Bill 08-063 that's in the loop for 2008.
New laws:
Replaces current off-highway vehicle and snowmobile sound standards with a statewide SAE international standard of:
90 db(A) for snowmobiles manufactured on or after July 1, 1972, but prior to July 2, 1975; and
88 db(A) for snowmobiles manufactured on or after July 2, 1975.
Exempts closed-circuit races and vehicles used in an emergency for search and rescue and for agricultural purposes.
Imposes a penalty of up to $100.
New laws:
Replaces current off-highway vehicle and snowmobile sound standards with a statewide SAE international standard of:
90 db(A) for snowmobiles manufactured on or after July 1, 1972, but prior to July 2, 1975; and
88 db(A) for snowmobiles manufactured on or after July 2, 1975.
Exempts closed-circuit races and vehicles used in an emergency for search and rescue and for agricultural purposes.
Imposes a penalty of up to $100.
LazyBastard
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Whats wrong with that? You gotta be loopy to willingly make your sled loud, and stock noise level is well within the limits.
Mtn-Track
Extreme
The only problem that I have with it:
IT WAS DRAFTED BY THE COLORADO SNOWMOBILE ASSOCIATION!
Nothing like taking a dump in your own back yard, eh?...........
IT WAS DRAFTED BY THE COLORADO SNOWMOBILE ASSOCIATION!
Nothing like taking a dump in your own back yard, eh?...........
Tom-RX1
Expert
might be cleaning up the dump that is there from the loud sleds . Noise is closeing trails . a few idiots that run loud are ruining it for everybody else . If more laws are needed to get rid of these few then good for them .
Tom-RX1
Tom-RX1
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I actually think that it is brilliant that the Colorado Snowmobile Assocation drafted this. We definitely need to be more proactive about this. I will never understand why guys have to make their sleds loud. I outgrew clipping playing cards onto my Bicycle so it would sound like a motorcylce when I was 10.
bdm
Expert
Mark me down for liking the quiet.
more bigger better laws makes warm fuzzy secure inside like a fluffy pair of legilative slippers .
RXB-1
Extreme
I am all for keeping the sound reasonable BUT 90 DBs sounds very low. on my YZ 426 I am at around 96 DBs and I cant get any quieter. My TRX1 sounds louder than my bike.... Does anyone know what a stock RX1 puts out sound wise? I am thinking it is more than 90
mikeb
Expert
I like the quiet and no smell. Low impact makes it easier to keep trails open. 90 is aggressive but duable.
150 Firecracker
120 Ambulance siren
110 Chainsaw, Rock Concert
105 Personal stereo system at maximum level
100 Wood shop, Snowmobile
95 Motorcycle
90 Power mower
85 Heavy city traffic
60 Normal Conversation
40 Refrigerator humming
30 Whispered voice
150 Firecracker
120 Ambulance siren
110 Chainsaw, Rock Concert
105 Personal stereo system at maximum level
100 Wood shop, Snowmobile
95 Motorcycle
90 Power mower
85 Heavy city traffic
60 Normal Conversation
40 Refrigerator humming
30 Whispered voice
QCRider
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snoway said:
I don't disagree with you. However, when people don't have the common sense to police themselves something needs to be done.
Traildale
Extreme
How EXACTLY is the sound level measured under the Colorado law?
For example in MN with bikes, its measured with the bike stationary, in neutral, reved to one-half the rev limiter RPM - different for every bike. For a bike with a 12,500 rev limiter its measured at 6250 RPM, but for an old Honda XR with a 8000 RPM max, that bike is measured at 4000 RPM. The sound meter is placed level with the tail pipe, 22 inches behind the tail pipe, and 22 inches to the side of the pipe tip (at a 45 degree angle from the pipe tip) and the sound meter should be using the A-weighting setting.
For sleds, I've seen a couple different measurement techniques legislated. The old one for manufacturers that I remember was a measurement from the side, 50 feet away from the sled, with the sled accelerating at full throttle. The probem with this was that the production sleds are made during the summer and fall, so there had to be some adjustments to the measurements to allow manufacturers to test and get approved while testing on grass - since there isn't snow to test on year-round.
The other testing method legislated for sleds, and designed to more easily allow for field testing by the DNR, measures the decibel level at the point of clutch engagement with the sled stationary. However I don't know where the sound meter is required to be - probably to the side of the sled but I don't know the exact distance. Anybody know the details on this one?
Apparently there's a third standard in the works as well, scheduled for 2010, using a steady speed 15 mph measurement.
Found on the net:
In addition to the SAE standards used by the snowmobile manufacturers, new snowmobiles are also built to meet tough US EPA exhaust emission standards. The first phase of the emission standard has concluded with the 2007 model year and the manufacturers are preparing for the second phase which will begin with models produced for 2010.
All new snowmobiles are made to pass two intense sound test procedures. They are certified by a third party internationally recognized testing agency which administers the two rigid sound tests. First is the SAE J-1161 a steady speed pass-by test and the second is the SAE J-192 which tests the vehicle in the most extreme condition at wide-open throttle.
When following the SAE J-1161 sound test procedure, the vehicle can generate no more than 73 decibels at the steady speed of 15 mph. When following the SAE J-192 test procedure, the vehicles at full throttle can generate no more than 78 decibels + 2 decibels for environmental variables.
Most states require sleds to pass one of two tests that were developed by the Society of Automotive Engineers (SAE). These tests are either the SAE J192, an acceleration test through a 150-foot trap with a maximum decibel level of 78 dB at 50 feet, or the SAE J1162, a 15 mile per hour pass by test with a maximum decibel level of 73 dB at 50 feet (see diagram). These tests insure that all stock snowmobiles meet the sound level criteria demanded by each state.
So, what are the details on the Colorado law, because those decibel levels (90 and 88) you mentioned are pretty high compared to the two moving vehicle tests above.
For example in MN with bikes, its measured with the bike stationary, in neutral, reved to one-half the rev limiter RPM - different for every bike. For a bike with a 12,500 rev limiter its measured at 6250 RPM, but for an old Honda XR with a 8000 RPM max, that bike is measured at 4000 RPM. The sound meter is placed level with the tail pipe, 22 inches behind the tail pipe, and 22 inches to the side of the pipe tip (at a 45 degree angle from the pipe tip) and the sound meter should be using the A-weighting setting.
For sleds, I've seen a couple different measurement techniques legislated. The old one for manufacturers that I remember was a measurement from the side, 50 feet away from the sled, with the sled accelerating at full throttle. The probem with this was that the production sleds are made during the summer and fall, so there had to be some adjustments to the measurements to allow manufacturers to test and get approved while testing on grass - since there isn't snow to test on year-round.
The other testing method legislated for sleds, and designed to more easily allow for field testing by the DNR, measures the decibel level at the point of clutch engagement with the sled stationary. However I don't know where the sound meter is required to be - probably to the side of the sled but I don't know the exact distance. Anybody know the details on this one?
Apparently there's a third standard in the works as well, scheduled for 2010, using a steady speed 15 mph measurement.
Found on the net:
In addition to the SAE standards used by the snowmobile manufacturers, new snowmobiles are also built to meet tough US EPA exhaust emission standards. The first phase of the emission standard has concluded with the 2007 model year and the manufacturers are preparing for the second phase which will begin with models produced for 2010.
All new snowmobiles are made to pass two intense sound test procedures. They are certified by a third party internationally recognized testing agency which administers the two rigid sound tests. First is the SAE J-1161 a steady speed pass-by test and the second is the SAE J-192 which tests the vehicle in the most extreme condition at wide-open throttle.
When following the SAE J-1161 sound test procedure, the vehicle can generate no more than 73 decibels at the steady speed of 15 mph. When following the SAE J-192 test procedure, the vehicles at full throttle can generate no more than 78 decibels + 2 decibels for environmental variables.
Most states require sleds to pass one of two tests that were developed by the Society of Automotive Engineers (SAE). These tests are either the SAE J192, an acceleration test through a 150-foot trap with a maximum decibel level of 78 dB at 50 feet, or the SAE J1162, a 15 mile per hour pass by test with a maximum decibel level of 73 dB at 50 feet (see diagram). These tests insure that all stock snowmobiles meet the sound level criteria demanded by each state.
So, what are the details on the Colorado law, because those decibel levels (90 and 88) you mentioned are pretty high compared to the two moving vehicle tests above.
QCRider
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This is why the route taken in Quebec actually makes more sense. There it is illegal to ride with modified exahust period. Leave it the way it came from the factory and you have no problems, modify it and you will be fined if caught.
LazyBastard said:
The problem with that.Mountain riding is whole different game.
Most guys don't gert exhaust to make a sled loude rout there it's to make it lighter.That's why so many companies are making under tunnel exhaust for the 4 strokes it for weight loss.
QCRider
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pro116 said:
So what? If the end result is that it is too loud then it is a problem. I don't care why someone feels the need to do it. By the way, saving a couple of pounds of weight is not a NEED. It is a want.
RXB-1
Extreme
QCRider said:
So is snowmobileing in general a " Want" or a "Need"..
Having to keep things just as it was when you bought it is flat out stupid.! Hey heres an idea.... Let's have our government make all our dicissions for us..
If they would make them 100% efficent maybe But that is just not how it is done. If you ride in a sound sensitive area then go quiet But where I ride THERE IS NO ONE THERE TO HEAR IT.
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