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2001 XR250 R Exhaust sound test

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Can any one tell me what decible reading an XR 250R would read. I have removed the restrictor plug, But left the end cap an spark arrester on. It doesn't seem any louder than my new KTM 400 EXC, stock. I just woud like to know if it will pass a sound test to be able to ride on Michigan CCC trails. I hate to have to buy a new muffler, I rejetted and it runs so wonderful. Its actualy more fun to ride than my new KTM.

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I'd like to know this myself... cause how i have it (02, same deal) it seems way to loud... even by my motorhead standards.

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Not sure what you mean by restrictor plug. I have removed the little 1/2 pipe and mini muffler that I had to cut out of the center of the end cap.

I made a custom insert that fit into the hole that I made.

My bike has been tested by the BLM, Forest Service and CA OHV park rangers.

The range of readings 89 - 96dB, The readings vary to conditions of test area. Open dirt area = low reading, concrete pad = high reading.

If you cut out the same part that I did, you will be in the range of 96 - 98dB.

I have seen a lot of bikes with the small pipe cut out, and they are allowed to race.

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Your bike will be below 96 with the restrictor out, but in MI you need to be 94db which is iffy. Quiet products (www.quietiscool.com) makes a replacement insert for less than $45 that flows better. Several people here have bought them and like it.

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Hey guys, I'm sorry to kind of, hijack the thread. But I have an 01 XR250R also. The other day i just took the whole endcap off. And road it down the street. It was louder then a lot of things ive heard. Does anybody have an idea of how many decibels that is?

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It's been a couple of years since I did my sound measurements on my bike. I think without an endcap, at 1/2 throttle = 108+dB. :thumbsup: I ran it long enough to get a reading then stopped.

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Yeah the cops were at my house. I started it up. Went down the street once. Then put the bike back. And within 20 minutes. They were at my door.

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