ADVrider

Go Back   ADVrider > Riding > Regional forums > The Rockies – It's all downhill from here...
User Name
Password
Register Inmates Photos Site Rules Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Search this Thread Display Modes
Old 04-16-2013, 11:59 AM   #16
ramz
Professional Trail Rider
 
Joined: Dec 2006
Location: Salida, CO
Oddometer: 1,958
Go here:
http://www.fs.fed.us/t-d/programs/fi...sag-index.html

Download "Off-Highway Vehicles (3.3 MB)"
See page 37, line 640.
ramz is offline   Reply With Quote
Old 04-16-2013, 12:02 PM   #17
_CJ OP
Retrogrouch
 
_CJ's Avatar
 
Joined: Dec 2010
Location: The 719, Yo.
Oddometer: 1,377
Okay, so I've got these parts on the way.

http://www.rockymountainatvmc.com/p/...05/-/-/213212/
http://www.rockymountainatvmc.com/p/...05/-/-/167657/





Planning to cut off the end of the OEM muffler, remove any of the factory stuff inside, make a mounting plate of some sort, then bolt this stuff in place. Forest Service certified, and the quietest spark arrestor core they make.

I'll post some pictures of the process and results (or failure ).


__________________
.
.
Moto since 2011, DR350
MTB since 1991, Full-Rigid Steel 1x8
_CJ is offline   Reply With Quote
Old 04-16-2013, 12:17 PM   #18
_CJ OP
Retrogrouch
 
_CJ's Avatar
 
Joined: Dec 2010
Location: The 719, Yo.
Oddometer: 1,377
Quote:
Originally Posted by Crenshaw View Post
Here is the tail end of my dr350 muffler. My bike is a '90 also, but it came with an aftermarket pipe which I replaced with this stock one. So no idea what year the muffler us from...

Well, would ya look at that....I found the same thing on mine after taking a wire brush to it.

BUT, based on your picture and the ones below, I'm 90% certain my muffler has been modified previously. There are some pretty hacky looking welds, and I can see the inner perforation by looking down the pipe instead of the plate that should be there.

It should look like this:



But I think somebody removed the plate, and this is what I see:



__________________
.
.
Moto since 2011, DR350
MTB since 1991, Full-Rigid Steel 1x8
_CJ is offline   Reply With Quote
Old 04-16-2013, 12:23 PM   #19
SaharaJp99
Studly Adventurer
 
Joined: Feb 2011
Location: Nunn
Oddometer: 648
That screen right there should be the spark arrestor, unless exhaust gas can flow around it somehow.
SaharaJp99 is offline   Reply With Quote
Old 04-16-2013, 12:38 PM   #20
_CJ OP
Retrogrouch
 
_CJ's Avatar
 
Joined: Dec 2010
Location: The 719, Yo.
Oddometer: 1,377
Quote:
Originally Posted by SaharaJp99 View Post
That screen right there should be the spark arrestor, unless exhaust gas can flow around it somehow.
Quote:
Originally Posted by Forest Service memo
How Spark Arresters Work
Spark arresters work on the principle of trapping or pulverizing carbon particles with a diameter greater than 0.023 in. The centrifugal trap-type arrester is by far the most common design used by OHV enthusiasts. In addition to the requirement of certain efficiency levels, a trap unit must have a clean-out device.
Those holes are at least .050", so not really compliant. I don't really think any embers are going to get through that existing screen, but I'm just not going to risk it. This new setup may be overkill, but it'll give me some piece of mind.

_CJ screwed with this post 04-16-2013 at 01:23 PM
_CJ is offline   Reply With Quote
Old 04-16-2013, 01:46 PM   #21
wakewop
Hucker
 
Joined: Jun 2008
Location: westminster co
Oddometer: 699
Those holes are way to big to be approved. I used some stainless mesh from a kitchen strainer a couple years ago and the ranger at rampart was minutes away from ticketing me. He had to go on a call all of a sudden or I would have been screwed. My mesh was even tighter then the holes you are showing. The mesh on an approved arrestor is very fine.
wakewop is offline   Reply With Quote
Old 04-16-2013, 05:35 PM   #22
MeterPig
Meh
 
MeterPig's Avatar
 
Joined: Jul 2007
Location: Parker, Colorado...
Oddometer: 17,089
Well, this has been entertaining.
__________________
You looked down here...didn't you.
MeterPig is offline   Reply With Quote
Old 04-22-2013, 05:32 PM   #23
_CJ OP
Retrogrouch
 
_CJ's Avatar
 
Joined: Dec 2010
Location: The 719, Yo.
Oddometer: 1,377
Okay, got it all done.


Bought these.



Removed the old muffler end.



As expected, the factory spark arrestor had been removed by a previous owner.



Started cutting out new metal from exhaust pipe I had laying around.



Shaped the metal to match the new arrestor, and welded in nuts for the bolts.



All welded up and ready for paint.



Forest service legal with a touch of bling.


__________________
.
.
Moto since 2011, DR350
MTB since 1991, Full-Rigid Steel 1x8
_CJ is offline   Reply With Quote
Old 04-22-2013, 07:08 PM   #24
Greco
Momma's boys
 
Greco's Avatar
 
Joined: Apr 2006
Location: Colorado Springs
Oddometer: 957
When you said you were handy with a welder, I had no idea. Dang!
__________________
Ukla, Ariel, Ride! - Thundarr the Barbarian
Greco is offline   Reply With Quote
Old 04-23-2013, 07:15 AM   #25
Colorado Uli
Motociclista Non Elegante
 
Colorado Uli's Avatar
 
Joined: Feb 2006
Location: Riding Paradise - Grand Junction
Oddometer: 2,544
This subject has come up several times over the past few years here and I've actually read the FS regulation governing this. Currently, the FS does NOT require any stamping on your exhaust that says anything about it being approved, or compliant, or cute & cuddly, or anything else like that.

What it does call for is stamping that states the following information:
1) Manufacturer
2) Model
3) Type (i.e. screen type).

That's what's required now.
__________________
Something, something, something ... in latin.

"Now with more SE then ever!"
Das KTM520
2004 KTM 625 SXC - Sick. Getting better
Colorado Uli is offline   Reply With Quote
Old 04-23-2013, 07:34 AM   #26
_CJ OP
Retrogrouch
 
_CJ's Avatar
 
Joined: Dec 2010
Location: The 719, Yo.
Oddometer: 1,377
Quote:
Originally Posted by Colorado Uli View Post
This subject has come up several times over the past few years here and I've actually read the FS regulation governing this. Currently, the FS does NOT require any stamping on your exhaust that says anything about it being approved, or compliant, or cute & cuddly, or anything else like that.

What it does call for is stamping that states the following information:
1) Manufacturer
2) Model
3) Type (i.e. screen type).

That's what's required now.
Not exactly.....

What's required is that it pass an inspection regardless of any markings it may have.

Quote:
Originally Posted by Forest Service
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.

http://www.fs.fed.us/eng/pubs/html/0...7/03511307.htm


.
__________________
.
.
Moto since 2011, DR350
MTB since 1991, Full-Rigid Steel 1x8

_CJ screwed with this post 04-23-2013 at 07:44 AM
_CJ is offline   Reply With Quote
Old 04-23-2013, 12:07 PM   #27
Rodzilla
Horny as Hell
 
Rodzilla's Avatar
 
Joined: Feb 2005
Location: Wheat Ridge Colorado
Oddometer: 1,447
When the FS does the sparky check at the Rampart poker runs they just stick a piece of dowel down the pipe. If it goes in, you fail, if it meets a screen or Kritzman you pass
__________________
COHVCO/COTPA/BRC/USA-ALL/ARRA/AMA/Moab Parnership
COHVCO Supporter
Rampart Range Motorcycle Management Committee(RRMMC) Past President/VP
Certified SAE J1287 sound tester
Rodzilla is offline   Reply With Quote
Old 04-23-2013, 01:56 PM   #28
Colorado Uli
Motociclista Non Elegante
 
Colorado Uli's Avatar
 
Joined: Feb 2006
Location: Riding Paradise - Grand Junction
Oddometer: 2,544
Quote:
Originally Posted by _CJ View Post
Not exactly.....

What's required is that it pass an inspection regardless of any markings it may have.




http://www.fs.fed.us/eng/pubs/html/0...7/03511307.htm


.
Yes, that is indeed the procedure for how a FS employee must check your spark arrestor. However, it is not the marking reqirement. Those are found here (only one convenient location to read FS's requirement, but in agreement with the guide): http://www.fs.fed.us/t-d/programs/fire/spark/faq.html#M&L


Here's what it states about markings:

"What about Marking and Labeling?
Each arrester shall be permanently marked with the manufacturer's model number designation and a trademark or other identification or manufacturer. Where an inverted installation is possible, the inlet or outlet shall also be marked. In addition to the above markings, screen-type devices must have the words "Screen Type" clearly imprinted in 1/8-inch or larger letters. the model number must match exactly. The words "Qualified" or "Approved" are not required, and do not indicate that the unit is in fact a qualified arrester."


Please note that it specifically states that the words "Qualified" or "Approved" are not required.
__________________
Something, something, something ... in latin.

"Now with more SE then ever!"
Das KTM520
2004 KTM 625 SXC - Sick. Getting better
Colorado Uli is offline   Reply With Quote
Old 04-25-2013, 09:25 PM   #29
James Adams
Misplaced
 
James Adams's Avatar
 
Joined: May 2006
Location: Metromess
Oddometer: 8,641
That appears to be a labeling requirement directed toward the manufacturer of the arrestor, not vehicle operator. Even when the arrestor is compliant, it could be installed inside the muffler and therefore the markings may be completely obscured.
James Adams is offline   Reply With Quote
Old 04-25-2013, 10:22 PM   #30
MeterPig
Meh
 
MeterPig's Avatar
 
Joined: Jul 2007
Location: Parker, Colorado...
Oddometer: 17,089
Quote:
Originally Posted by Rodzilla View Post
When the FS does the sparky check at the Rampart poker runs they just stick a piece of dowel down the pipe. If it goes in, you fail, if it meets a screen or Kritzman you pass
Clearly, after this thread, the FS will be upping their game.
__________________
You looked down here...didn't you.
MeterPig is offline   Reply With Quote
Reply

Share

Thread Tools Search this Thread
Search this Thread:

.
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On

Forum Jump


Times are GMT -7.   It's 01:31 AM.


Powered by vBulletin® Version 3.8.5
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright ADVrider 2011-2014