Aftermarket Exhaust and Spark Arrestors

[Goldentaco]

Searching for exhaust options and needing a USFS spark arrestor I quickly found there is very little information on many of the MFGs websites.  With most of the offerings being from European companies, the spark arrestor situation gets even dicier.  Finding any information directly from the USFS leads to a bunch of individual tales and questionable interpretations of the actual legalities. The actual legalities lie in a few different documents so lets look at a few of the important designations that play into this big puzzle.  I'm not going to wade into interpreting the laws around this as it doesn't really matter what my interpretation is, the LEO you encounter has the final say if a test is conducted.  

 

So I decided to compile a list of various Exhausts that do or do not have Spark Arrestors.  Those that don't have SA's can be fitted with USFS approved SA's and become legal so long as all the exhaust gasses pass through the SA.  As long as the Exhaust outlet is round, this should be easy to remedy.  So I set out to make a list of available Exhaust options for the Tenere 700 and sent emails to the MFGs for more information.  I will update the list as I get responses.  If there are other brands I did not include, leave a comment and I'll update the info. 

 

*All the MFG info I am listing is available on their website or was sent to me via an email inquiry I submitted on the website.*

 

A few USFS SA's that may work depending on the Exhaust Outlet I.D.:

FMF: This should be 48mm O.D. FMF Pn-040261 ( FMF 4.1/4.C Spark Arrestor)

FMF Factory 4.1 4c Replacement Spark Arrestor Universal 040261 - Hillery Motorsports

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Fisch Moto:  They make easy to install USFS Spark Arrestors that fit 20mm-45mm outlets. 

FISCH MOTO SPARK ARRESTOR USFS APPROVED

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Fisch Moto Spark Arrestor USFS approved Universal muffler fitment (as long as tail pipe is round) Perfect for Dirt Bikes, ATVs, Enduro and other round tailpipes - see our sizing below. Will fit any circular exhaust with a tail pipe inside diameter from 20-45mm/0.800”-1.800”(5mm/0.196” increments, 5 sizes available) Goo

 

Exhausts:

 

-Akrapovic CARB approved -From Akrapovic:"The Slip-On system S-YSO2-HFTT has a noise insert however it does not have the screen on the end that would make it qualify as a spark arrestor. Our R&D team is aware of the need for one in the US and we are working on a solution. If/when available, you would simply swap out the existing noise insert for one with a screen on the end (Spark arrestor)."

 

-Arrow - No spark Arrestor currently, but as of 26AUG2020 it is in development.  From Arrow: "72626xx silencers all come with a dB-killer: we still have to develop a spark arrester for this bike. Exit pipe internal diameter is 58mm (for silencers with carbon endcap – dB-killer is held in place with a seeger ring) and 43mm (for silencers with stainless steel endcap – the ones with “external” exit pipe)."  Extra info:  Seeger ring is a brand name for common Snap rings.

---EDIT 13OCT2020--Arrow sales just confirmed they have Spark arrestors available for their Tenere 700 exhausts.  The info should be up on their website soon.  Very cool they emailed me back specifically with this info based on my previous request.

 

 

-HP Corse  -Has dB killer but NO SPARK ARRESTOR.  Per HP Corse sales response, " Our muffler have dB killer and flame breaker."  When confirming if Flame breaker is a spark arrestor, "Our mufflers have dB killer not spark arrestor"

 

-Wings - Has a db Killer and Spark arrestor. 48mm outlet. ----Edit: 18AUG2020, Spark Arrestor is USFS compliant but not yet approved.  Wings is awaiting response back from SDTDC ( San Dimas Technology and Development Center).  This is the testing "laboratory" for USFS/USDA Spark arrestor approval.

 

T7 Rally -Awaiting more info-

-Mivv  -CARB approved -NO SPARK ARRESTOR.

-Termignoni -Awaiting more info-

-Leo Vince  LV One Evo Stainless or Black Edition CARB approved  No spark arrestor. 52mm Outlet I.D.

 

-Huzar  No Spark Arrestor, but db killer is 47.17mm Fisch or FMF Sparky will fit.  Fisch possibly longer grub screws.  I will be confirming this one personally when I receive the parts.

 

-DominatoR -NO SPARK ARRESTOR.  Outlet is 48mm

-Remus -Awaiting more info-

-SC Project -NO SPARK ARRESTOR.  dB killer may or may not be USFS approved, US Distributor unsure of approval status so I would say not approved.  Awaiting confirmation of Outlet diameter.

-Yoshimura RS-12-  Has available USFS Approved Spark Arrestor. 

-Zard  -Awaiting more info-

 

 

A couple clarifications on exhaust approvals:

 

CARB: compliant with the requirements of the Air Resources Board of the California Environmental Protection Agency. Products marked as CARB compliant are considered replacement parts under CARB regulations.  Replacement part approval states the non OEM part is functionally equivalent to the original. 

 

 

J

 

Edit: 18AUG2020---added info on Wings USFS approval.

Edit: 20AUG2020---added response from Akropovic.

Edit: 24AUG2020—added info for Yoshimura. 

Edit: 26AUG2020---added info for Arrow.

Edit: 31AUG2020---added info for SC Project and Mivv.

Edit: 13OCT2020---added info on Spark Arrestor availability for Arrow exhausts.

Edit: 08MAR2021---added info for HP Corse.

Edited March 8, 2021 by Goldentaco

[Seventh Son]

Nice work.  Thanks for your efforts. 

[Goldentaco]

Added Akropovic response.

 

J

Edited August 20, 2020 by Goldentaco

[Goldentaco]

Added Yoshimura exhaust. 

[BellissiMoto]

Arrow does not have a SA.

 

There is another US company that is working on an exhaust, and it will have a SA.

[Idarex]

SC Project?

[Tazmool]

Very nice work!

Tazmool

[Goldentaco]

2 hours ago, Idarex said:

SC Project?

I’ll check with them. 

[NvNick]

Does your car or truck have a spark arrestor ? Ever been checked ? 

[Motodude]

I can appreciate your efforts in trying to decipher the US Forest Service laws for an SA. The truth is, your catalytic converter qualifies since it meets their requirements as a screen.

[Simmons1]

3 hours ago, Motodude said:

I can appreciate your efforts in trying to decipher the US Forest Service laws for an SA. The truth is, your catalytic converter qualifies since it meets their requirements as a screen.

If stopped by a Forest Ranger would he buy that explanation?

 

If  the Cat meets the requirements why do US bikes also have spark arrestors in the muffler?

[Goldentaco]

The issue is absolutely confusing...most of the time.  Seems to be interpreted by LEOs a number of ways.  

Taken from Hollister OHV area in California:

http://www.4x4trailmaps.com/Files/Maps/hollisterhillsmap_lowerranch.pdf

SPARK ARRESTERS: All vehicles operating off-highway must be equipped with either a street legal muffler or a spark arrester maintained in effective working order.

 

J

 

[Goldentaco]

7 minutes ago, Stevoh said:

A lot of guys are using eBay/AliExpress mufflers, none of these have spark arrestors, I take my bike off road a fair bit so the chances are I'm going bend or damage my muffler at some stage so paying around $1000 dollars (Australia for an aftermarket muffler doesn't really make sense to me, I can live with not being as popular and cool as those with Akrosomthingorother mufflers, so it's a chinese jobby for me , under $100 (actually sound way better) 

It's quite easy to make a spark arrestor to suit, and as has been said with the catalytic converter already in place I'm pretty sure sparks are arrested.

I've included some pics on "how to"

For this spark arrestor I've gone all out and purchased a stainless mesh frying pan cover for $5 from the $2 Dollar shop ( yeah I know)

I may take some flak for this post, I don't mind

Again it's all in how the LEO interprets it in the field.  The mesh even has a spec (0.023") you can check that with 0.023 MIG wire or similar.  Another specification easier for them to fall back on is every USFS approved arrestor has a model designation that's published in their field guide.  If it's not there...no good.  

 

That said, I've never been questioned on my GS which may or may not have a full Remus system on it currently...or on any other ADV bike/Dual sport.  This has only been in OHV parks though.  In the forest that may be a different story.

 

J 

 

J

[NvNick]

I’ve been riding offroad for 58 years now, my father started me when i was 4. In all that time i have only been checked for a spark arrestor at a race or an enduro and they checked by sticking a wire into the exhaust.

[Pflugervillian]

On 11/22/2020 at 7:46 AM, NvNick said:

I’ve been riding offroad for 58 years now, my father started me when i was 4. In all that time i have only been checked for a spark arrestor at a race or an enduro and they checked by sticking a wire into the exhaust.

I've been riding almost 20 years and I've never even been stopped by a LEO.

[Goldentaco]

I've been running around with this for a while now and it's been working well.

I ordered the Fisch Moto 40mm Spark arrestor to install in my Huzar pipe.  The Huzar outlet is 47.6mm and I originally tried to fit the arrestor with no spacer.  It needed longer set screws so I ordered M4 0.7 in 20mm.  While this "fit" it didn't seem too secure so I set out to make a spacer.

 

The OD of the spark arrestor is right around 39.6mm.  I needed a spacer roughly 39mm x 47mm x 20mm.  It was quite difficult to find off the shelf spacers to fit and ultimately I ordered a Brass bearing sleeve that was 39mm x 50mm x 30mm.  I planned to shave it down to the dimensions I needed.

 

I don't have a lathe or access to one so I found this from Harbor Freight which fit my hand drill:

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It has a tapered shaft so it's a little difficult to get perfectly centered in the drill but it worked well enough to shave the spacer down to dimensions I needed.  I can't remember where I ordered it from as I placed about 5 orders from different vendors all overseas.  The process to get the spacer took roughly two months in itself.  The one that actuall worked out was from Zoro.

Bunting Bearings CBM040050040 $15.00 Sleeve Bearing, I.D. 40, L 40 | Zoro.com

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Order Bunting Bearings Sleeve Bearing, I.D. 40, L 40, CBM040050040 at Zoro.com. Great prices & free shipping on orders over $50 when you sign in or sign up for an account.

 

 

Once properly sized, the stock setscrews of the arrestor fit fine. I wanted to secure the whole thing like Huzar's db killer but I decided to drill and tap threads into the Fisch Moto arrestor body.  I drilled a corresponding hole in the spacer for the bolt to pass through.

 

All done up the whole thing is secure and USFS approved.  installation and removal takes less than a minute.

 

 

 

J

 

Edited February 8, 2022 by Goldentaco

[One Man Trail]

Fisch on a HP Corse

[Pops]

Do you remember which kit you used when ordering this spark arrestor?  
they offer a wide variety.  I could go try to measure but if you already did the install it would save the worry of ordering the wrong one. Here are the options they list

 

We offer the following sizes:
    •    Kit 19 (19.0mm-20.0mm / 0.748”- 0.800”)
    •    Kit 20 (20.0mm-25.4mm / 0.800”-1.000”)
    •    Kit 25 (25.5mm-29.4mm / 1.004”-1.157”)
    •    Kit 30 (29.5mm-35.4mm / 1.161”-1.394”)
    •    Kit 35 (35.5mm-40.4mm / 1.398”-1.591”)
    •    Kit 40 (40.5mm-45.7mm / 1.596”-1.800”)

Edited March 2, 2022 by Pops

[kainic]

Does anyone sell Black Widow exhausts in the US?  $65 USD for shipping is rough.

 

[Black Dog Moto]

29 minutes ago, kainic said:

Does anyone sell Black Widow exhausts in the US?  $65 USD for shipping is rough.

 

For the price of the whole exhaust, you’re still way ahead money wise vs local exhausts. I just installed one yesterday. Sounds good and saved over 4lbs over stock. 

[kainic]

Yup. Just dropped the coin for the exhaust. Now off to order the Camel high exhaust kit. 

[kainic]

Wow, ordered on Sunday and the exhaust shows up today. Damn quick!

[Zebco Kid]

Hello,

 

I have a Huzar exhaust. Did you ever determine if there’s a good off the shelf fit for this muffler? I purchased a Fisch Moto Kit 40. It’s not an easy match/fit.

 

Thank you.

 

DG

[Papabjorn]

On 3/2/2022 at 1:24 PM, Pops said:

Do you remember which kit you used when ordering this spark arrestor?  
they offer a wide variety.  I could go try to measure but if you already did the install it would save the worry of ordering the wrong one. Here are the options they list

 

We offer the following sizes:
    •    Kit 19 (19.0mm-20.0mm / 0.748”- 0.800”)
    •    Kit 20 (20.0mm-25.4mm / 0.800”-1.000”)
    •    Kit 25 (25.5mm-29.4mm / 1.004”-1.157”)
    •    Kit 30 (29.5mm-35.4mm / 1.161”-1.394”)
    •    Kit 35 (35.5mm-40.4mm / 1.398”-1.591”)
    •    Kit 40 (40.5mm-45.7mm / 1.596”-1.800”)

@Pops where you able to figure out which one it was? I just ordered a corse hp exhaust and I'll need to get a spark arrestor too.

[Pops]

He is a picture of my order. Fit perfect