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Post Info TOPIC: exhaust upgrades, worth it?


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Well, a new bike isn't in the future, so thinking about upgrading parts of the TTR.  Are exhaust mods worth the price? Do you get real performance gains, or is it just noise?  Looking at the shorty header from totallyttrs, and a new either FMF or Pro Circuit silencer.  



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2004 Yamaha TTR250



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The shorty headers allegedly give a power increase in performance as well as a cosmetic enhancement.  wink

Whether the performance is noticeable or usable depends on how far your right wrist turns and your satisfaction.

It is your choice when all's said and done. Ask yourself this, "Do I use ALL the power the engine gives me?" and "Do I actually NEED more power?"

You could always wait for Mossproof's big motor instead and save the header hassle. smile

Martyn



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Kaos' dyno runs to test his shorty header here:
www.ttr250.activeboard.com/t64301240/shorty-header-pipe-fitted-dyno-before-and-after/


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Cubber wrote:

The shorty headers allegedly give a power increase in performance as well as a cosmetic enhancement.  wink

Whether the performance is noticeable or usable depends on how far your right wrist turns and your satisfaction.

It is your choice when all's said and done. Ask yourself this, "Do I use ALL the power the engine gives me?" and "Do I actually NEED more power?"

You could always wait for Mossproof's big motor instead and save the header hassle. smile

Martyn


 Thank you for the info!!



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Yeah with a shorty header i saw a 1.5 HP gain, and can notice the difference. That was a seven % gain that just bolted on.   If you look at the before and after dyno runs the engine now builds revs quicker and makes power a bit longer.

The muffler IMO is worth it for the weight loss, about 2 kg lighter than the stock muffler.
Should also give a decent gain in power unless yours is already well and truly derestricted.   

Around 2 or 3 HP extra

See this test  
http://ttr250.activeboard.com/t64192586/october-1999-motocross-action-magazine-on-ebay/

So IMO is the exhaust worth it, if you have got the $$$ definitely wakes the little 250 up.

Make sure its uncorked, ie grind of the header pipe restrictor, adjust the throttle limiting stop..   If you arent worried about water crossings pull the airbox snorkel out and rejet the carby.  Totally different bike.



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I would probably go FMF over Pro Circuit, every pro Circuit I have ever hear or had has been LOUD.

I notice Yamaha Australia still has new GYTR mufflers listed on their Y Shop page too.

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Kaos, I've removed the snorkel, and re-jetted already. From what I understand, my USA model stock header has lower restriction than European models already. I may be wrong on that? Anyway, thank you for your input. :)

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Kaos wrote:

I would probably go FMF over Pro Circuit, every pro Circuit I have ever hear or had has been LOUD.

I notice Yamaha Australia still has new GYTR mufflers listed on their Y Shop page too.


 Any chance of a product number please and what does the GYTR sound like ?

Steve



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GYT-4PX93-AU-AL (GYTR TTR250 Slip-On Muffler) $549.88
Fits:
My GYTR muffler is reasonably quiet putting around but gets a louder note at full throttle

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Looks niceGYT-4PX93-AU-AL.jpgGYT-4PX93-AU-AL



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Ps that's about £310

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it aint cheap then

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Nope, I can get brand new stock ones for a lot less and I still have not given up on getting another stainless one madesmile



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ttr steve wrote:

Nope, I can get brand new stock ones for a lot less and I still have not given up on getting another stainless one madesmile


 LIKE.....because we dont have a like button



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Jumpn wrote:

Well, a new bike isn't in the future, so thinking about upgrading parts of the TTR.  Are exhaust mods worth the price? Do you get real performance gains, or is it just noise?  Looking at the shorty header from totallyttrs, and a new either FMF or Pro Circuit silencer.  


 To be honest, they don‘t give you much more than a heap more noise. I have a TKP pipe on mine only because I found it cheap and I like a bit of noise.  It’s borderline too much though. It says 96db on the pipe which is clearly a lie biggrin

A shorty header might give you some more power though.

The best power mods are opening up of the airbox and a proper jetting kit. Pipes have had more effect on other bikes I’ve owned. Sure it feels like my TTR has more power and revs better but really? I think on a dyno you’d really not notice much.

And actually, most aftermarket pipes put the power higher up in the rev range. One of the best things about the TTR is torque down low. So you might actually harm the characteristics of the bike you like.

I also ride mine on road where the power up high is a benefit. I think its a good compromise. If it was just off road though, I’d not bother. As always YMMV



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