FMF Powercore 2 vs Stock

[sangle333]

I have a new to me 2003 200 that came w/a powercore 2 silencer.
I ride some organized dual sport rides and a spark arrestor is required along with db less than 96.
Additionally, I'm old and it's loud. LOL.
- > Question : can I put the stock silencer on with out having to re-jet or mess with anything else?

[kdxsully]

Probably. rejetting is usually associated with the header pipe.

[sangle333]

Ok, thanks. Does anyone know of a way to make the Powercore 2 not as loud?

[John_S]

Since the bike is new to you I would just assume the silencer needs to be repacked. Its cheap and once you do it a couple times you'll know right away when its time. It gets noticeably louder.

Is the stock silencer a spark arrester? On most bikes it isn't.

[KDXGarage]

Re-pack the FMF silencer. That may help some, but it will never be as quiet as stock.

Stock is a spark arrestor on pretty much any KDX. If you want quiet, stock is the best you can buy.

[tucker]

Often when your silencer is getting loud it means you need to repack your silencer. See how that goes first. Apparently the powercore isnt much of a gain over the stock silencer. Its more the exhaust pipe which is key.

[oldmankdx69]

The FMF is quite a bit lighter in weight than the stock silencer. Doesn't always matter to everyone but just FYI.

[SS109]

To answer your question, you need to swap out to a stock or, IMO better than the stock H series silencer, an FMF Turbinecore. The add on screen type spark arrestors for two stroke bikes absolutely suck unless you like servicing it after, literally, every ride or two. Been there, done that, never again!

On the E series, I agree, the stock silencer is superior to any aftermarket option. However, on the H series I think the Turbinecore is better as it is serviceable, lighter, and still keeps you well below the 96dB limit. At races I routinely test between 87 to 92dB depending on how long since I repacked my Turbinecore.

[bufftester]

+1 on the TurbineCore. I have been running one for a while and IMO it is nearly as quiet as the OEM and way lighter.

[John_S]

Did your bike come with the air cleaner lid and the snorkel? You mentioned not only the spark arrestor but wanted it to be quiet also. Both of those parts play a HUGE role in the sound. The snorkel takes out all the intake noise and is stealthy quiet. Running no lid after having the snorkel in is really loud, relatively speaking.

If you're worried it will choke the bike off, search youtube "kdx wide open song". That video and the guys other torture test video was all done with the snorkel in. I'd have to think most of us would be happy with the performance of that bike. I haven't seen those videos in a while. That guy rips.

[SS109]

I don't think my bike is loud without the air box lid and running an FMF desert pipe and Turbinecore silencer. Of course, I guess it depends on how quiet you want it. Here's mine being run hard:

[sangle333]

Did your bike come with the air cleaner lid and the snorkel? You mentioned not only the spark arrestor but wanted it to be quiet also. Both of those parts play a HUGE role in the sound. The snorkel takes out all the intake noise and is stealthy quiet. Running no lid after having the snorkel in is really loud, relatively speaking.

If you're worried it will choke the bike off, search youtube "kdx wide open song". That video and the guys other torture test video was all done with the snorkel in. I'd have to think most of us would be happy with the performance of that bike. I haven't seen those videos in a while. That guy rips.

Now that I'll have to take a look at. This is my first 2T so I'll learn as I go but, It just sounds very high pitched. I'm guessing that I just need to repack it. But then again it doesn't have a spark arrestor so, now I'm leaning towards the TurbineCore just for that, ugh!

[pumpguy]

If you can get your sound down to 96 dB or lower by just repacking, you might look into an add on spark arrestor.

From what I have read, the USFS requires max .023" mesh screen across the exhaust opening. There's lots of youTube videos showing how to make your own, although some have clearly larger than .023" mesh screen.

If you want to get really accurate with this mesh measurement, a #75 drill bit measures .021", while a #72 drill bit measures .025". You can use these drill bits for GO and NO GO gauges.

[SS109]

I strongly recommend against a screen type spark arrestor on a 2T. That was what I was talking about in my earlier post about add on types. I had one on my '94 KDX250. After literally every ride the screen gets more and more buildup and starts to restrict exhaust flow which affects your jetting. It has to be removed and cleaned every couple of rides (if it's USFS sized screen) to keep your bike running properly. If you hadn't noticed, FMF and Pro Circuit do not offer screen type sparkys for 2T's.

[KDXGarage]

Just get a stock spark arrestor.

[sangle333]

Did your bike come with the air cleaner lid and the snorkel? You mentioned not only the spark arrestor but wanted it to be quiet also. Both of those parts play a HUGE role in the sound. The snorkel takes out all the intake noise and is stealthy quiet. Running no lid after having the snorkel in is really loud, relatively speaking.

If you're worried it will choke the bike off, search youtube "kdx wide open song". That video and the guys other torture test video was all done with the snorkel in. I'd have to think most of us would be happy with the performance of that bike. I haven't seen those videos in a while. That guy rips.

Now that I'll have to take a look at. This is my first 2T so I'll learn as I go but, It just sounds very high pitched. I'm guessing that I just need to repack it. But then again it doesn't have a spark arrestor so, now I'm leaning towards the TurbineCore just for that, ugh!

Hey John. Nope. No lid or snorkel. I posted a new topic. Where to get air filter cage because the guy cut it wide open so even if I get the gasket, top and snorkel it 1. wont attach and 2. seal anything. LOL

[KDXGarage]

I saw that. That kinda would be quite important on sound lessening / abatement.

[sangle333]

I saw that. That kinda would be quite important on sound lessening / abatement.

Those air boxes must be a hot commodity!

[KDXGarage]

https://www.ebay.com/itm/Kdx200-Intake- ... Sw3TNeXy8a

https://www.ebay.com/itm/1995-95-Kawasa ... xy66pRvkn3

Please read the descriptions THOROUGHLY. I did not.

Retail is around $320.

[sangle333]

https://www.ebay.com/itm/Kdx200-Intake- ... Sw3TNeXy8a

https://www.ebay.com/itm/1995-95-Kawasa ... xy66pRvkn3

Please read the descriptions THOROUGHLY. I did not.

Retail is around $320.

Wow, thanks! looks like the first one could do the trick. It doesn't look look exactly like the image on partszilla but, it could be close. hell idk.