ORIGINAL: incabiker

I read that too, but didn't they say that the rpms were in the 3,000 - 4,000 RPM range. At those RPMs it said it reached a quiet 92 or 96 db, can't remember. You think it will be much louder with the RPM's in the 7,000 range?

ORIGINAL: bmwhd





All you need worry about is the letter of the law in SAE J1287, the standard the forest service uses for OHV noise testing.

For our bikes, the test could be applied two ways: First, the reading could be done at 5,250 RPM (half of redline) and you would be allowed 99 db (+3 db over the 96 db limit is allowed for using half redline instead of half "rated engine speed"). In fact, a reading of up to 100.5 db could be acceptable because there is a range of +/- 1.5 db for test condition variation.

Second, you could make the case for having the test conducted at 4,100 RPM by siting the "Alternate Engine Speed" calculation of Appendix A in the standard which calls for test RPM to be 250,000/stroke in mm which works out to 4,085 or so.

I think that this test will be easy to pass with the Muzzy when running the quiet core and spark arrestor.

ORIGINAL: KLXrider44

Does anybody know how the muzzy does on the admissions test and when u order from starcycle.com do you just order it for the klx 300 it will mount up all right

ORIGINAL: motoguy128


The Muzzy does not have a catalytic converter. Therefore it will most likely fail any emissions test that the stock bike was designed to pass. The catalytic converter is a honeycomb ceramic material impregnated with certain rare metals (CATALYST). At the normally high exhaust temperatures, these metals trigger a chemical reaction in the exhaust gasses and CONVERTS less desireable Nitrogen (NOx) compounds into more desireable ones. That's where the term "catalytic converter" comes from.

ORIGINAL: incabiker

Wow, way to go!!, thanks for that bit of information Where did you come by this, when you were buying another muffler for another bike? Good information BMWHD!! I'm thinking hard about the MUZZY NOW!!

ORIGINAL: deej

Emissions tests? We have neither up here in Washington......well unless you live in King or Pierce county or maybe not.....Tony? Do they have them up there? Out here on the Olympic Peninsula we are still off the radar.....LOL and loving it. Did you ever drive through one of those towns where you said "that's it?" Well that's Forks, and I wouldn't change for a big bag of money......OK wait how big are the bills, and what kind of bag are we talking about? One stop light, now if I could only get my bike to trip the light sensor I can stop going in right hand circles. LOL hahahah, OK I think the 5th cup of coffee is kicking in, later all.

deej

ORIGINAL: dazjr

A cheap upgrade is an older KLX250 or KLX300 stock muffler/exhaust. I have bought 2 off e-bay for $20 each. You want one that has the removeable spark arrestor. It probably doesn't make as much power as a Muzzy, but it can be quiet or loud and it looks stock.