Procedures available for Download;
1) Throttle Body Synchronization
2) Measuring Exhaust Sound Level
Scroll down to find the document desired...
1) Throttle Body Synchronization
2) Measuring Exhaust Sound Level
Scroll down to find the document desired...
Throttle Body Synchronization cvvmax December 2012
On occasion, the Throttle Bodies may need to be checked and synchronized.
If you see that your Tachometer needle is "glitching" on the downswing, before you start jumping up and down like so many before have done and start the laborious task of changing out spark plugs or ordering and installing expensive new injector coils, try this simple task of checking your Throttle Body Syncs. It will cost you far less monetarily and time wise.
On occasion, the Throttle Bodies may need to be checked and synchronized.
If you see that your Tachometer needle is "glitching" on the downswing, before you start jumping up and down like so many before have done and start the laborious task of changing out spark plugs or ordering and installing expensive new injector coils, try this simple task of checking your Throttle Body Syncs. It will cost you far less monetarily and time wise.
California enacts an "un-sound" Exhaust Law Publish Date: 03 January 2013
In 2010, one of California Governor Arnold Schwarzenegger’s final acts was to sign SB435, the Motorcycle Anti-Tampering Act. This law gives police the authority, starting on 01 January 2013, to ticket motorcycles with non-compliant exhaust systems. It applies only to 2013 motorcycle models and exhaust systems. Older bikes equipped with aftermarket systems purchased before 01 January 2013, are not affected. Although it would be virtually impossible to tell. An older bike that has a non-compliant aftermarket exhaust installed or purchased after the 01 January 2013 deadline would also be in violation of the law. A rider must be initially cited for another infraction -- such as speeding, not signaling or an illegal turn -- before he or she can be cited for violation of SB435. A first conviction generates a fine of between $50 and $100, which can be dismissed at the discretion of the court upon proof of correction. A second conviction raises the fine to not less than $100 or more than $250, but there's no provision for dismissal of the fine. The law, sponsored by Senator Fran Pavely (D-Santa Monica) was proposed because “current state and federal noise control statutes are rarely and unevenly enforced.” Requiring the display of an EPA label would be a “readily visible indication of whether a motorcycle has been tampered with..." she stated at the time. She pointed out that enforcing the law would not require any special technical training or equipment, and that delaying the bill’s effect until 2013 would give aftermarket manufacturers adequate time to react. Tim Calhoun, executive vice president of Leo Vince, indicated to Dealer News that his company has identified exhaust systems that can be built as SB435-compliant, but that they are going to take a “wait and see” approach to determine if and for what models they will be building pipes. "We have the science to [build a compliant pipe]; it just has to make financial sense," Calhoun said. "The big issue is who’s going to buy them... The reality is there is nothing you can do to them. You can’t modify them, they’re going to perform fairly equal to stock, there’s not going to be a substantial weight savings – you’re going to have looks and maybe a little bit better sound, but there’s not a lot to them.” Calhoun noted that the California market had “just about dried up last year. There was about a 70 percent reduction in sales. A lot of that had to do with Tucker Rocky and what they’re going through with CARB, and sending out letters to their dealers saying, ‘We've been subpoenaed and you may be subpoenaed too...' A lot of dealers just backed away from exhausts completely…a substantial loss for all aftermarket exhaust makers.” There are a number of problems with SB435, Calhoun said. (Dealer News also contacted other exhaust manufacturers and is awaiting response.) “In my opinion the law was not well planned and not well executed. It started out as an emissions bill and became a sound bill. There are a lot of better ways to address that. J2825 [see below] is a much better form of testing relieving the worst of the offenders out there.” Random enforcement and owner’s actions create additional problems, Calhoun said. “You’re going to be seeing cops on both sides of the fence, some will be pulling over any bike… the bike maybe a 10, 11 or 12 [model year] where the law doesn’t apply. Worse yet, you’re going to see a lot of owners just gut their stock exhaust, they’re going to run horribly, make lot of noise and not address the issue, or they’ll replace their exhaust with a non-compliant system [and] when they get a ticket they’ll satisfy it by putting the stock exhaust back on, then change back again, so you’re really not stopping much of anything." Pam Amette, vice president of the Motorcycle Industry Council (MIC), largely agrees. She said SB435 doesn’t make gutting a stock 2013 muffler a violation, doesn’t address the sound issue for older bikes and aftermarket systems, and will increase pollution. She added that on many motorcycles, particularly those with bodywork, it’s difficult to find the EPA label. And now that the EPA’s noise control office has been defunded, there’s no one enforcing the correct placement of the EPA label, she noted. As a consequence the label can be difficult to find, sometimes requiring lying on the ground to see it. Better alternative? The SAE J2825 roadside stationary test is a better solution, according to many in the industry. It’s simple, economical, and effective, and has been tested enough so that it won’t falsely fail the EPA standard. SAE J2825 was developed by the MIC in collaboration with the SAE Motorcycle Technical Steering Committee, and backed by the AMA. You conduct the SAE test by holding a sound meter 20 inches behind the exhaust outlet, at the same height and at 45 degrees from the motorcycle's line of travel. The test procedure includes an Idle Test and a Set RPM Test. The Idle Test is the easiest to administer and can be used to screen various mufflers. The Set RPM Test, however, is most effective for identifying excessively loud exhaust systems. Along with the test are dBA recommendations by the SAE: • 92 dBA at idle for all motorcycles • 96 dBA for motorcycles with fewer than three cylinders or more than four cylinders at 2000 rpm • 100 dBA for motorcycles with three or four cylinders at 5,000 rpm In developing the standard, 25 motorcycles and more than 50 aftermarket exhaust systems were evaluated. According to the MIC President Tim Buche, “The winners are riders everywhere who no longer need to be subjected to arbitrary local jurisdiction.” While SB435 is now in place, the MIC along with the rest of the industry is working to get the State of California, the California Air Resources Board (CARB) and EPA to adopt J2825. According to Amette, there's a fair amount of support from various state and federal authorities, but so far not much action. Some provinces in Canada have adopted the regulation and Transport Canada is recommending that it be adopted in all provinces. Many dealers in California quit installing aftermarket exhausts on bikes a few years ago. That being said, it’s obvious that even if dealers are no longer installing aftermarket systems, someone has been. Amette suggested that dealers who have sold aftermarket exhausts to their customers have the owners retain their receipts to prove that the system was manufactured and purchased prior to 01 January 2013. Basic Set-Up Meter Inlet 20" from Muffler Outlet Static Noise Measured (64.9 dBA) Noise Level at 20 inches at Idle (101.6 dBA) Noise Level at 20 inches at 5kRPM (109.0 dBA) Noise Level at 15 inches at Idle (102.1 dBA) Noise Level at 15 inches at 5kRPM (110.8 dBA) Meter Set at 45Degree Angle The AZ8928 is Manufactured AZ Instrument in China but since they do not have an English Website, you can purchase it here at AliExpress and it is really cheap there; http://az-instrument.com/ AliExpress URL; http://www.aliexpress.com/item/Free-shipping-AZ8928-sound-level-meter-decibel-meter-40-130dB/600397533.html |
Measuring Exhaust Sound Level
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