How do I know if my YZ125 has a spark arrestor?

[Axehind]

I bought a used yz125. I’m looking to ride it on some trails but I just read that they require spark arrestors. I’m wondering how do I tell if my yz has one?  Picture of what I have attached. 

[mritch8]

That silencer does not have a spark arrestor

[Luke Ferachi]

you can stick a piece of metal or something like that in the end of the silencer and if it stops it has a spark arrestor. they’re just there there to prevent “sparks” from coming out the end of your pipe and catching the forests on fire

[Axehind]

2 minutes ago, mritch8 said:

That silencer does not have a spark arrestor

Well crap. Do those pro circuit  screen things work at all? I just don’t want a ticket. 

[mritch8]

There are usually spark arrestor inserts you can buy from them yea

[Axehind]

12 minutes ago, mritch8 said:

There are usually spark arrestor inserts you can buy from them yea

 

Thanks

[Mxryder2h]

There are usually spark arrestor inserts you can buy from them yea

Not for a two stroke....

You’ll need a silencer or spark arrestor with a usfs stamp on it

[rpt50]

Both FMF and Pro Circuit offer true spark arresters for the YZ 125.  I have the PC model.  You can also by a "screen type" attachment that will be legal, but it requires constant cleaning on a two stroke.  If most of your riding is on land where you need a spark arrester, you definitely don't want to be messing with the screen type, as they clog easily.

Look around for used spark arresters.  You can usually pick one up for $30-40.  If you give the year of your bike, someone on this forum might even have one laying around they will sell you.  

Edited August 26, 2018 by rpt50

[hondaxr650rrrr]

You might try looking for a Sparky add on spark arrestor. They can be removed and you can use your present silencer on track days.

[YZDOC]

2 hours ago, hondaxr650rrrr said:

You might try looking for a Sparky add on spark arrestor. They can be removed and you can use your present silencer on track days.

Those are crap (Called a Sparky Cobra) and almost as much as a FMF Turbo core II USFS, or the PC 296. What is on the OP bike is a PC 304. 

Edited August 27, 2018 by 2 STROKE YZ DOC

[KDXGarage]

Look on the FMF and Pro Circuit sites to see their models of USFS approved spark arrestors. I will also say what others wanted to say and didn't:

 

 

[RMK800]

You might try looking for a Sparky add on spark arrestor. They can be removed and you can use your present silencer on track days.

I find that spark arrestors for two stroke are quite different then four stroke. Four stroke can definitely rob you power, however, I haven’t notice much with my two stroke with a spark arrestor.

[Mxryder2h]

I find that spark arrestors for two stroke are quite different then four stroke. Four stroke can definitely rob you power, however, I haven’t notice much with my two stroke with a spark arrestor.

2 strokes don’t really rev out with a s/a. I hate using them on anything though.

[Axehind]

On 8/26/2018 at 7:21 AM, rpt50 said:

Both FMF and Pro Circuit offer true spark arresters for the YZ 125.  I have the PC model.  You can also by a "screen type" attachment that will be legal, but it requires constant cleaning on a two stroke.  If most of your riding is on land where you need a spark arrester, you definitely don't want to be messing with the screen type, as they clog easily.

Look around for used spark arresters.  You can usually pick one up for $30-40.  If you give the year of your bike, someone on this forum might even have one laying around they will sell you.  

2001 yz125

[Axehind]

Anyone know what size insert I should get from pro circuit? I see 1.5 and 1.75 inch sizes along with some others? Or do I need to measure something? 

[CaptDan]

In the old days, officers would merely poke a stick down into the silencer to see if something stopped it. Generally it would be a screen or baffle that (supposedly) kept sparks from blowing straight through the silencer. If the stick hit something before going more than 1 or 2 inches, you were considered legal. From the photos of your silencer, it definitely does not have a spark arrestor.

These days if you are stopped by an officer, he will look to see if you have "US Forest Service (U.S.F.S.) Approved" stamped into the body of your silencer. If not, he can issue you a ticket. You may have some sort of insert, but if they want to be strict they can simply say the silencer is not identified as Approved, and you get a ticket.

A Cobra "Sparky" can be bolted onto the end of the silencer, and it will have the U.S.F.S. stamp, so that will work. But as mentioned, the Sparky uses a screen, and it will need to be cleaned regularly. And they're not cheap.

http://www.spotmotorcycles.com/cobra-sparky-exhaust-universal-spark-arrestor-2-14-inch-9190/

 

You would be smarter to just buy a silencer that incorporates an approved S.A. (spark arrestor). FMF calls theirs Turbine Core. Pro Circuit calls theirs "296" or Nature Friendly. You'll need one if you plan on riding anywhere that is not a Closed Course or on private land. Get a used one, repack it, and call it good!

https://www.ebay.com/itm/1998-YAMAHA-YZ125-YZ-125-Aftermarket-FMF-Muffler-Silencer-Spark-Arrestor/282921050737?fits=Model%3AYZ125&hash=item41df68a271%3Ag%3AMqgAAOSw0A9azluy&LH_ItemCondition=4

Good luck, and keep us updated with what you do. ?

Edited August 29, 2018 by CaptDan

[Axehind]

10 minutes ago, CaptDan said:

I

You would be smarter to just buy a silencer that incorporates an approved S.A. (spark arrestor). FMF calls theirs Turbine Core. Pro Circuit calls theirs "296" or Nature Friendly. You'll need one if you plan on riding anywhere that is not a Closed Course or on private land. Get a used one, repack it, and call it good!

Good luck, and keep us updated with what you do. ?

Thank you for your help. I guess I'll just buy the full silencer+arrestor.  I'm kinda new to all this so I dont know about the compatibility aspect... Do I have to get the pro circuit one or would the fmf one also just hook right up as well?

 

[CaptDan]

Both FMF and ProCircuit make quality stuff. It may come down to price and availability. For some reason the 2000 & 2001 YZ125 had a unique silencer, though I could never figure what made them different from the 1996-1999 bikes.  Good luck!

https://www.procircuit.com/nature-friendly-yz125-00-01.html

https://www.fmfracing.com/Product/ProductDetail?CategoryID=62&BikeType=MX%2FOFFROAD&BikeMake=&BikeModel=&BikeYear=&ParentCategoryID=52&Priority=5&SearchText=

Edited August 29, 2018 by CaptDan

[KDXGarage]

I strongly suggest you get one that is stamped USFS approved. I have read that rangers are looking for that.

[YZDOC]

2 hours ago, CaptDan said:

Both FMF and ProCircuit make quality stuff. It may come down to price and availability. For some reason the 2000 & 2001 YZ125 had a unique silencer, though I could never figure what made them different from the 1996-1999 bikes.  Good luck!

https://www.procircuit.com/nature-friendly-yz125-00-01.html

https://www.fmfracing.com/Product/ProductDetail?CategoryID=62&BikeType=MX%2FOFFROAD&BikeMake=&BikeModel=&BikeYear=&ParentCategoryID=52&Priority=5&SearchText=

I believe it was 96-99 that had the female spigot off the Jug and the pipe was slightly longer in the stinger. I would bet they "could" work as you can change the head up to 04, but that is unconfirmed.