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Old 08-07-2012, 10:26 PM   #21
Stunt Heavy
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Quote:
Originally Posted by switch View Post
you need a spark arrester.

i have a 2006 yamaha yz250f with a stock exhaust. anyone know if they come stock with an arrester?

Bummer, that puts me out. Being an MX bike, i highly doubt the yz250f has an arrestor. I'm in the same boat with an 09 KX450f. Guess I'll have to wait a few weekends until I can afford a new endcap
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Old 08-08-2012, 09:04 AM   #22
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Quote:
Originally Posted by Stunt Heavy View Post
Bummer, that puts me out. Being an MX bike, i highly doubt the yz250f has an arrestor. I'm in the same boat with an 09 KX450f. Guess I'll have to wait a few weekends until I can afford a new endcap
Field test for a spark arrestor would be to insert a stick or rod into the end cap of exhaust to see if it passes through. Any screen in place would stop the stick and therefore you pass. End cap or exhaust does not have to be stamped USFS approved. Even if it was stamped approved screen could have been removed so stick test would probably be done anyway.

I say remove your end cap and insert your own temporary screen so you can ride. Any metal screen or hardware cloth will work. If your DIY spark arrestor will stay in long term then look up specs for required mesh size. Doesn't have to be pretty just functional and in place.

Having said all that, I've been riding SHNF frequently for over 3 years now. I have never seen a Ranger at any of the trailheads and I have never ever even heard of a Ranger inspecting or looking at anyone's exhaust. However spark arrrestors serve an important purpose as the forest is dry and fire is always a concern.

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Old 08-08-2012, 04:36 PM   #23
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Thanks for the info. I'll do the stick test, and run to the hardware store if needed.
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Old 08-08-2012, 06:50 PM   #24
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So.... How many of you are actually going, and how many have homebrew sparkys? Or does everyone have USFS stamps
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Old 08-09-2012, 04:40 PM   #25
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Quote:
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So.... How many of you are actually going, and how many have homebrew sparkys? Or does everyone have USFS stamps
So far I think only myself and Parker are 100% confirmed and a couple other maybes. All my pipes are either factory or aftermarket stamped but that is not required. Only required to have a spark arrestor which I stated earlier is simply a screen.

If you haven't got a OHV sticker yet no need to drive round for one as you can buy Parker's. My current sticker is still valid til Aug-31 and I'm only buying his extra one for next year.

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Old 08-09-2012, 05:35 PM   #26
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never heard of said stick test....Game Warden did check for USFS approved stamp though when were stopped 2 years ago.
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Old 08-09-2012, 05:53 PM   #27
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never heard of said stick test....Game Warden did check for USFS approved stamp though when were stopped 2 years ago.
Werd. USFS stamp of approval on the pipe (if it's an integrated spark arrestor) or on the endcap if it's an add-on cap.
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Old 08-09-2012, 06:43 PM   #28
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Yeah I only know of me and SilverBullet as for sure being there.
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Old 08-09-2012, 07:50 PM   #29
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ok did the stick test, failed it. no screen in there at all. the stock end cap looks riveted, have no idea how to remove it. :(
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Old 08-09-2012, 07:56 PM   #30
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you'd have to drill out the rivets, built your screen and reinstall it. I bet something like a portion of a metal kitchen strainer would work awfully sweet, for a little while.

I think I'm going to play it safe, go to Rio this weekend, and next week order a new USFS endcap for 125$. I'd rather wait a week and be legal, than a monstrous ticket.
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Old 08-09-2012, 10:03 PM   #31
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wondering how big that ticket is...
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Old 08-10-2012, 08:07 AM   #32
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short quote from below link:
"The words "Qualified" or "Approved" are not required, and do not indicate that the unit is in fact a qualified arrester."

It then details the inspection procedure. Of course this is never done on the trail. They always accept the stamp or put a small diameter rod or stick into the exhaust to determine if screen is in place, nothing more. So if you want to ride put in your own screen and you're legal and save the $125.

Once again guys no stamp is required only a screen.

http://www.fs.fed.us/t-d/programs/fi...ml#INSPECT-MSE

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Old 08-10-2012, 09:54 AM   #33
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I'm just gonna clamp some screen door mesh over the exhaust =P
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Old 08-10-2012, 01:52 PM   #34
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and next week order a new USFS endcap for 125$. I'd rather wait a week and be legal, than a monstrous ticket.
Holy geeze. 2T for the win! My entire NEW FMF Q stealth USFS approved silencer is $150.

Can't believe they charge $300 & up for 4t exhaust pipes.

Wonder which one has the higher profit margin.
This is $300:
fmf 08 pow cor iv s a sil

And this is $160:
fmf 11 exh q ste sil
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Old 08-10-2012, 03:28 PM   #35
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You have to compare apples to apples to make it fair. The 2 stroke muffler only has 2 strokes going through it and the 4 stroke muffler has twice as many strokes going through it. Of course it's going to cost twice as much. It's simple math. That or a giant scam by the muffler makers. You decide.
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Old 08-10-2012, 04:55 PM   #36
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You have to compare apples to apples to make it fair. The 2 stroke muffler only has 2 strokes going through it and the 4 stroke muffler has twice as many strokes going through it. Of course it's going to cost twice as much. It's simple math.
haha. good one.
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Old 08-10-2012, 05:48 PM   #37
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You guys are killing me. Fine. What time is everyone leaving houston? I've never been to sam houston, wouldn't mind following someone up
Oh, and is that spare sticker still available? If so consider it sold!

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Old 08-10-2012, 05:54 PM   #38
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You guys are killing me. Fine. What time is everyone leaving houston? I've never been to sam houston, wouldn't mind following someone up
I'm in Humble near Lake Houston. I would be leaving my house about 6:15am to make the trailhead by 7:30am (70 miles for me).

If you have room swing by and pick me up as I'd prefer not to pull my trailer. I'll split gas with ya and show you the way.

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Old 08-10-2012, 05:54 PM   #39
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$300 for a new exhaust with silencer
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Old 08-10-2012, 06:53 PM   #40
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I'm in Humble near Lake Houston. I would be leaving my house about 6:15am to make the trailhead by 7:30am (70 miles for me).

If you have room swing by and pick me up as I'd prefer not to pull my trailer. I'll split gas with ya and show you the way.

_
Fine by me if you don't mind riding it mybig noisy diesel beater

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$300 for a new exhaust with silencer
Build something! That's what I'm doing. I think I'm just going to try and TIG a piece of drain screen into my endcap.
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