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Old February 12th, 2013, 08:15 AM   #1
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Default Michigan OVR and Spark Arrestors?

Iím planning to trip to Mio, MI to Bull gap and surrounding trails with my rail buggy. Right now I just have a stinger with a baffle in it. How strict is Michigan with spark arrestors? We plan on riding some Truck off road trails and seasonal roads. Should I purchase another setup for my trip? My buggy is street legal. Thanks!
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Old February 12th, 2013, 08:23 AM   #2
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I never had any problem at the mounds, twisted trails, rocks and valleys, or bundy hill running glasspacks.

If you are just running public stuff... I doubt you'll get any trouble.

That being said, you could have just played dumb. Jeg's knockoff flowmasters are $25 fyi.
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Old February 12th, 2013, 08:28 AM   #3
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Thanks for the reply. Being its a buggy they might look at it different. I have been to silver Lake and I know they have an actual inspection booth before you enter the park. Iím not sure about Bull Run hill and all these other little ORV trails if there is anyone doing that?? If not then Iím sure Iíll be fine.
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Old February 12th, 2013, 08:30 AM   #4
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I live within 15 miles of bull gap and have been their a lot, I have never had trouble or been asked about spark arrestors on my jeep. I have heard story of DNR stopping bikes and quads. I personally would purchase the correct stuff so you won't have a problem, it would suck to drive this far and not be able to enjoy your time. I removed cherry bombs when I went to silver lake last summer because they are not legal and I didn't want a hassle on my weekend out.
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Old February 12th, 2013, 08:38 AM   #5
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I live within 15 miles of bull gap and have been their a lot, I have never had trouble or been asked about spark arrestors on my jeep. I have heard story of DNR stopping bikes and quads. I personally would purchase the correct stuff so you won't have a problem, it would suck to drive this far and not be able to enjoy your time. I removed cherry bombs when I went to silver lake last summer because they are not legal and I didn't want a hassle on my weekend out.
Thanks. You are right, it would suck to drive all that way and get screwed. I can get a u-bend collector and cheap spark arrestor for under $100. My buddy said something about putting metal window screen over the tip of the stinger, but I'm not sure that will fly.
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Old February 12th, 2013, 08:52 AM   #6
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For the experts, would this suffice as a spark arrestor?

http://www.speedwaymotors.com/Dynate...nch,48598.html
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Old February 12th, 2013, 08:55 AM   #7
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The screen probably wouldn't pass I'm sure they got silly words in the rule about approved spark arrestor, but I have ran open headers at bull gap so many times I can't count and never started the sand on fire.
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Old February 12th, 2013, 09:02 AM   #8
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For the experts, would this suffice as a spark arrestor?

http://www.speedwaymotors.com/Dynate...nch,48598.html
No expert here but I would think not because I believe it has to be DNR or UL or somebody approved piece
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Old February 12th, 2013, 09:05 AM   #9
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Thanks. You are right, it would suck to drive all that way and get screwed. I can get a u-bend collector and cheap spark arrestor for under $100. My buddy said something about putting metal window screen over the tip of the stinger, but I'm not sure that will fly.
Tried the screen door at Silver Lake It was a Big NO. Also tried after market spark arrestor it didn't pass either. If they are sticklers like Silver Lake, Arrestor must say us forestry approved.
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Old February 12th, 2013, 09:23 AM   #10
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I think Silver lake is the only one that has an actual inspection area. The other places maybe just a random pull over here and there.
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Old February 12th, 2013, 09:35 AM   #11
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I think Silver lake is the only one that has an actual inspection area. The other places maybe just a random pull over here and there.
Correct, if you are a betting man I would bet you won't get hassled in this area. BUT it could ruin your time if you did.
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Old February 13th, 2013, 08:12 AM   #12
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Arrestor must say us forestry approved.
This is what is required.
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Old February 13th, 2013, 08:45 AM   #13
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this is what is required.
x2
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Old February 14th, 2013, 08:51 AM   #14
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This is what is required.
I don't think I have ever seen a muffler with USFS on it, but if they have baffles they are considered spark arrestors, right?
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Old February 14th, 2013, 09:00 AM   #15
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The way I understand it can't be a straight through muffler like a cherry bomb, has to be chambered. At silver lake they try to shove a rod up through them.
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Old February 14th, 2013, 09:46 AM   #16
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So if you add this inside the exhaust system to block straight through flow, wouldn't that be enough?

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Old February 14th, 2013, 09:58 AM   #17
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Again I am no expert, but like someone else said technically per the law it has to be forest service approved and marked. This cone would stop the probe like they use at silver lake but I still don't think it is exactly legal. Last time I went to silver lake I purchased new muffler but didn't put them on I still ran my cherry bombs with no problem, but I think they could of hassled me.
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Old February 14th, 2013, 10:08 AM   #18
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I run Supertrapp disc only models after glasspacks. They are marked USFS approved and take the crackle out of the glasspack.




http://www.supertrapp.com/product_se...t.asp?CatID=27
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Old February 14th, 2013, 11:31 AM   #19
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Again I am no expert, but like someone else said technically per the law it has to be forest service approved and marked. This cone would stop the probe like they use at silver lake but I still don't think it is exactly legal. Last time I went to silver lake I purchased new muffler but didn't put them on I still ran my cherry bombs with no problem, but I think they could of hassled me.
I love the state and it's rules.

If they probe your tailpipe and it goes through you are illegal.
You are only legal if you have USFS approval on your muffler.

Seems to leave a big grey area in the middle.
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Old February 14th, 2013, 12:37 PM   #20
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This should clear it up

324.81133

Operation prohibited;

(g) Unless the vehicle is equipped with a spark arrester type United States forest service approved muffler, in good working order and in constant operation. Exhaust noise emission shall not exceed 86 Db(A) or 82 Db(A) on a vehicle manufactured after January 1, 1986, when the vehicle is under full throttle, traveling in second gear, and measured 50 feet at right angles from the vehicle path with a sound level meter that meets the requirement of ANSI S1.4 1983, using procedure and ancillary equipment therein described; or 99 Db(A) or 94 Db(A) on a vehicle manufactured after January 1, 1986, or that level comparable to the current sound level as provided for by the United States environmental protection agency when tested according to the provisions of the current SAE J1287, June 86 test procedure for exhaust levels of stationary motorcycles, using sound level meters and ancillary equipment therein described. A vehicle subject to this part, manufactured or assembled after December 31, 1972 and used, sold, or offered for sale in this state, shall conform to the noise emission levels established by the United States environmental protection agency under the noise control act of 1972, 42 USC 4901 to 4918.
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