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Old 12-18-2012, 09:22 AM   #1
Skeeter1981 OP
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Forest Service - Spark Arrestor

This has probably been hashed out but all literature and info says that you must have a spark arrestor that has a Forest Service approval stamped on it for riding in off road in Colorado. Does a plated bike with a stock exhaust meet these requirements? If you add a screened insert - would that be sufficient?

Skeeter1981 screwed with this post 12-18-2012 at 02:09 PM
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Old 12-18-2012, 10:19 AM   #2
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When I have been tested, they simply have used a long metal rod to test for a screen. If your stock pipe is USFS approved (like a stock dr650) then you are fine. If it isn't, a plate will not mitigate that fact.

So, technically on USFS land, you are to have a spark arrestor.
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Old 12-18-2012, 07:16 PM   #3
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Stock exhaust if it has not been drilled out should be good.
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Old 12-18-2012, 09:07 PM   #4
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Quote:
Originally Posted by oldmanb777 View Post
Stock exhaust if it has not been drilled out should be good.
The stock exhaust should have embossed text on it saying it has an approved spark arrestor.

My KLX400 has 2 full paragraphs on the exhaust saying it's legal for street and has a spark arrestor. I had to scrape off the baked on mud to find it, though.
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Old 12-19-2012, 04:25 PM   #5
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If a bike came 48/50 state legal and titled for street use and it did not come with a sparky and you have not modified the exhaust, then you are not required to have a spark arrestor. On the other hand, your average USFS employee will not know this.

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Old 12-20-2012, 09:33 AM   #6
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Quote:
Originally Posted by dougrender View Post
If a bike came 48/50 state legal and titled for street use and it did not come with a sparky and you have not modified the exhaust, then you are not required to have a spark arrestor. On the other hand, your average USFS employee will not know this.

-Douyg
It was my understanding that if they can not pass a rod, stick or whatever through that they try to put in your exhaust you are fine. Meaning if you have baffles your not a straight through pipe.

My Leo Vince has USFS Approved on it and DOT Approved on it....it came with a bunch of setups from straight through with screen to baffles, I have the baffle setup in it.

Honestly I have never seen a USFS ranger anywhere checking people. That's been 40K+ miles of dirt with the only Ranger on a Forest Road looking back to see if I had a plate *shrug* I was gone while he looked back so not sure what he would of did in the F350 with a water tank in the back...LOL Guess this just means I avoid crowds and go out in remote areas.
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Old 12-20-2012, 10:28 AM   #7
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Originally Posted by modette View Post
Honestly I have never seen a USFS ranger anywhere checking people.
I have in fact had a different rate of encounters with Forest Rangers. A short list of the locations that I have had conversations with Rangers.

-Captain Jacks
-717
-Rainbow Falls
-Rampart
-Taylor
-Salida Area Trails
-Rand
-Donnor Pass
-Seven Mile

The idea that you can pass a spark arrestor test just by shoving a stick or rod down the pipe is wrong. Your exhaust must say "USFS Approved". You might get lucky, but homemade spark arrestors do no cut it.
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Old 12-20-2012, 11:07 AM   #8
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Quote:
Originally Posted by 602 View Post

The idea that you can pass a spark arrestor test just by shoving a stick or rod down the pipe is wrong. Your exhaust must say "USFS Approved". You might get lucky, but homemade spark arrestors do no cut it.
Mines not home made so no issue there.

I think it's like everything 100 different views even by the USFS Rangers...LOL

Best bet, is there a link to an actual law, rule or policy followed by the USFS Rangers? That be the best to go by, I'm too lazy right now to do that.
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Old 12-20-2012, 11:16 AM   #9
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Okay looked it up:
http://www.fs.fed.us/eng/pubs/html/0...Qualifications

Quote:
Qualifications for OHV Spark Arresters
The qualification standard requires spark arresters to be permanently marked with the model number and manufacturer’s name or trademark. Whenever contact is made with an OHV, regardless of what type of machine is used, a spark arrester inspection should be made.

Many people think that a muffler/silencer is also a spark arrester. Mufflers and silencers are only designed for noise control. Only an inspection can determine whether this is a spark arrester or a muffler/silencer.

If the OHV has been operating, beware of very hot metal in and around the exhaust system. The arrester will be a chamber-like device located somewhere along the exhaust discharge. Find the manufacturer’s name or logo and the model number located on the spark arrester. It may be necessary to clean a portion of the arrester to reveal that information. It can usually be found on an attached metal plate. The words “USDA Forest Service Qualified,” “Spark Arrester,” or “Qualified” stamped on a piece of equipment does not guarantee that it is a tested and qualified arrester.

Spark Arrester Inspection
Check to see if the entire exhaust system is sound and the arrester has been maintained. Also make sure that the spark arrester is mounted securely in the qualified position. In OHV use, this is usually the horizontal position. Proceed with a thorough inspection of the entire exhaust system.

With the engine off, and using a penlight, look into the spark arrester to visually ensure that the interior has not been removed or altered. You may be able to see the interior section that deflects the exhaust. Use a narrow rod, such as a 8-in wooden dowel, to gently feel for the internal parts of the arrester. Check how far you are able to insert the wooden dowel internally and cross check this measurement with the outside of the spark arrester/muffler. This will indicate whether you are able to pass the dowel the length of the arrester/muffler. If you are able to pass the dowel the total length, it is not a qualified arrester.

All trap spark arresters have internal fins or louvers that deflect the exhaust. If you suspect that an arrester may be altered, have the owner take the arrester apart for further inspection. Although the arrester/muffler may have the approved model number and the manufacturer information stamped on the shell, the inside components of the spark arrester mechanism may have been removed. Only through a thorough inspection can this type of modification be noted.

Arresters can be modified to avoid routine maintenance or to give the false perception of improved engine performance. Some modifications that have been detected include complete or partial removal of the spark arrester component parts, perforation of an arrester part, and installation of foreign objects into a muffler silencer, “mocking” spark arrester parts when a wooden dowel probe is used. Examples of these foreign objects are washers, bottle caps, and steel wool.

Exhaust System Maintenance
The next step is to check the exhaust system for maintenance. The exhaust system must be without holes, gaps, loose connections, or any areas that exhaust can escape without passing through the spark arrester. If the integrity of the whole system is not complete, the piece of equipment cannot pass the inspection regardless of whether it has a qualified arrester or not.

Owners must be aware that spark arrester laws include the term “in effective working order.” Spark arresters need to be periodically cleaned to eliminate the trapped particles of carbon. The same conditions that cause spark plugs to foul can also cause a spark arrester to become inefficient. If it is not maintained, then its performance is hampered and it is not considered a legal spark arrester.

Summary
As you become more informed about spark arrester inspections, you will look forward to educating OHV enthusiasts about the proper use and maintenance of spark arresters. The use and maintenance of spark arresters can contribute to the effort of preventing unwanted wildland fires.

Spark Arrester Guide
The Spark Arrester Guide is the only authoritative industry source for information on qualified spark arresters for use on internal combustion engines. Use the guide when identifying qualified spark arresters. If the spark arrester number appears in the guide, SDTDC has evaluated the arrester.

There are two volumes of the guide: General Purpose and Locomotive, Volume 1, and Multiposition Small Engine, Volume 2. A revision of the guide is published every year. Therefore, each volume is published every 2 years. An online guide, updated every quarter, is available on the USDA Forest Service Intranet at http://www.fsweb.sdtdc.wo.fs.fed.us. It is a searchable database that allows the user to make powerful searches.
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Old 12-20-2012, 12:43 PM   #10
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Quote:
Originally Posted by oldmanb777 View Post
Stock exhaust if it has not been drilled out should be good.
I don't see any brand or type of bike mentioned by the OP unless it was edited out. Many stock dirt bikes do NOT have any spark arrestor. Witness many KTM's among others. I've personally owned at least 5 where I had to add an FMF Stealth or Q. Both for noise and sparky. I wouldn't go out any more without one after this summer. If you we're anywhere near where a fire started the local USFS and fire dept attitude would likely be guilty until proven innocent.
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Old 12-20-2012, 12:55 PM   #11
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"Qualifications for OHV Spark Arresters"

Keyword there is OHV. If you have a DOT compliant machine, it's not an OHV, and it's regulate by DOT.

But yeah, I'm not advocating for this approach, but I happen to own a DOT bike that has a stock exhaust and no sparky and there is none that would fit without some serious welding fabrication.

But it's also a 2 stroke and runs cooler than a 4 etc. so I don't consider myself a hazard (no stones please).

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Old 12-20-2012, 02:55 PM   #12
Skeeter1981 OP
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Quote:
Originally Posted by murgatroid42 View Post
The stock exhaust should have embossed text on it saying it has an approved spark arrestor.

My KLX400 has 2 full paragraphs on the exhaust saying it's legal for street and has a spark arrestor. I had to scrape off the baked on mud to find it, though.
Thanks Murgatroid - Found the official wording on the back side of the stock pipe - now just need to get OEM stuff back on:
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Old 05-15-2013, 02:46 PM   #13
Skeeter1981 OP
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Pissed WTB- Spark Arrester and exhaust end cap for DRZ-250

Though I'd try this again to see if any inmates might have their original spark arrester and exhaust end piece they would be willing to sell. Not looking forward to spending $400 for new slip on (1/3 of bikes purchase price) Send me a PM if you can help out - thanks
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Old 05-15-2013, 05:05 PM   #14
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Just doing a search on flEbay yielded a bunch of results for around $50-$90. Keep an eye out for your year, and something will come up. Often, multiple years will fit, similar to XRs. Good luck!

Ex. http://www.ebay.com/itm/03-Suzuki-DR...ht_5326wt_1104
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Old 05-16-2013, 04:05 AM   #15
buls4evr
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Quote:
Originally Posted by modette View Post
It was my understanding that if they can not pass a rod, stick or whatever through that they try to put in your exhaust you are fine. Meaning if you have baffles your not a straight through pipe.

My Leo Vince has USFS Approved on it and DOT Approved on it....it came with a bunch of setups from straight through with screen to baffles, I have the baffle setup in it.

Honestly I have never seen a USFS ranger anywhere checking people. That's been 40K+ miles of dirt with the only Ranger on a Forest Road looking back to see if I had a plate *shrug* I was gone while he looked back so not sure what he would of did in the F350 with a water tank in the back...LOL Guess this just means I avoid crowds and go out in remote areas.

If you had been in New Mexico or in Michigan then you would have seen a forest service enforcement officer checking for SAs in a Natl. forest.You have been lucky so far if you have not been tested.This is taken very seriously in those 2 states for sure and you will be ticketed for sure if caught w/o one. NO, the stamping or a sticker is not good enough.... they do a visual and a rod test also at times. Put one on!!!!! Do you want to be the guy that burns a forest down that you love?
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