tt250 exashst bolt on?

[SeerAtlas]

uh....uh.....ug.....LOUDER

[hertz9753]

According to Motocheez it makes the bike go brap. brap. The red one is the fastest you can tell just by looking at my picture of the spark arrestor screen.

The header doesn't have a cat and the muffler is also less restrictive. It's like the Pearl Jam - Even Flow song.

[2LZ]

For those of us looking to upgrade our TT250 exhaust, let's discuss this little device for a second.

What many call an EGR, I believe is actually an air pump valve. Instead of taking unburnt gasses back through the air cleaner from the exhaust port like an EGR (which would make no sense to toss frying hot gasses on a rubber hose), I believe (at least here in CA), it actually opens and lets fresh, filtered air (O2) IN to the exhaust port and tosses that fresh oxygen on your cat to super heat it under heavy loads. Picture a blow dryer on a charcoal briquette. This little device, to the best of my knowledge, does nothing to hamper power. It's strictly there to help the cat burn excess HC's and CO under heavy throttle, up hills and under load.

That said....when you change your exhaust to a more free breathing unit, without a cat in the way....that little device will be tossing that extra fresh oxygen under load on to your brand new muffler packing, super heating it and shortening it's lifespan.

If you are looking to upgrade your exhaust and delete the cat, I would suggest to either remove the entire assembly and plate off the port at the head....or what we do here in CA. Put a BB in the small vac line to stop the diaphragm from opening....plus stick a large object inside the larger rubber hose that comes from the head. That way, it's no long functioning...but it LOOKS like it's there.

[BlackBike]

2LZ, thanks for showing this new "mystery lump". Makes good sense.

[Jayman77]

Originally Posted by BlackBike

2LZ, thanks for showing this new "mystery lump". Makes good sense.

I am still scared to buy a muffler much less a mystery lump

[Jayman77]

Originally Posted by 2LZ

For those of us looking to upgrade our TT250 exhaust, let's discuss this little device for a second.

What many call an EGR, I believe is actually an air pump valve. Instead of taking unburnt gasses back through the air cleaner from the exhaust port like an EGR (which would make no sense to toss frying hot gasses on a rubber hose), I believe (at least here in CA), it actually opens and lets fresh, filtered air (O2) IN to the exhaust port and tosses that fresh oxygen on your cat to super heat it under heavy loads. Picture a blow dryer on a charcoal briquette. This little device, to the best of my knowledge, does nothing to hamper power. It's strictly there to help the cat burn excess HC's and CO under heavy throttle, up hills and under load.

That said....when you change your exhaust to a more free breathing unit, without a cat in the way....that little device will be tossing that extra fresh oxygen under load on to your brand new muffler packing, super heating it and shortening it's lifespan.

If you are looking to upgrade your exhaust and delete the cat, I would suggest to either remove the entire assembly and plate off the port at the head....or what we do here in CA. Put a BB in the small vac line to stop the diaphragm from opening....plus stick a large object inside the larger rubber hose that comes from the head. That way, it's no long functioning...but it LOOKS like it's there.

Have you put it on your bike

[2LZ]

Originally Posted by Jayman77

Have you put it on your bike

An after market exhaust? I've put them on all of my bikes, with the exception of the TT because it just arrived. I don't plan on doing any mods until it's broke in.

On Q, I blocked the air pump off as I explained above so I didn't burn up my new muffler packing. Q is the only one that had the little pump on it. My X-Moto and my quad don't have the pumps because they're off-road only.

[SeerAtlas]

check out motocheeze's exhaust video on youtube. I take back what I said about not likely to increase power, as his bike is setup for highway type speeds and he pulls wheelies easily in second gear in that video!!!, da cheez is NOT a flyweight kinda guy, So, you can believe he's found some real, demonstrable power there!

[2LZ]

Originally Posted by SeerAtlas

check out motocheeze's exhaust video on youtube. I take back what I said about not likely to increase power, as his bike is setup for highway type speeds and he pulls wheelies easily in second gear in that video!!!, da cheez is NOT a flyweight kinda guy, So, you can believe he's found some real, demonstrable power there!

Indeed! These things can get going well with just a few mods. My Q 200cc scoots right along. An added extra 5 hp, dyno proven! That's quite a percentage of a jump when you consider it came with 15 hp.

[Jayman77]

Originally Posted by ughmas

It's the same one from the thread you linked earlier, the crf230f exhaust from ebay

This seller has multiple colors, I got the fastest black one

http://www.ebay.com/sch/Silencers-Mu...012&rmvSB=true

Placed my order today aluminum will keep you guys posted it will be well worth it for even 2 more hp do you guys have any suggestions on air breather modds

[2LZ]

Originally Posted by Jayman77

Placed my order today aluminum will keep you guys posted it will be well worth it for even 2 more hp do you guys have any suggestions on air breather modds

Looking forward to your report! I did some low speed trail riding today on the neighbors property and the TT did magnificent....but it really needs some help on the more demanding higher speed stuff. You can tell the cat and exhaust has it completely choked up.

[BlackBike]

Originally Posted by Jayman77

Placed my order today aluminum will keep you guys posted it will be well worth it for even 2 more hp do you guys have any suggestions on air breather modds

What is that bulge for on the head pipe?

[Azhule]

Originally Posted by BlackBike

What is that bulge for on the head pipe?

They are probably just 'designed' it to 'look or perform' like the FMF PowerBomb Header... the 'bulge' is the supposed to 'increase HP/Torque while lowering sound/DB levels'...

"The redesigned PowerBomb is a four-stroke header that incorporates FMF’s patented PowerBomb module at a precise location in the initial stage of the header. By positioning this “Bomb” at a key point in the system, increased performance and flow is achieved through the expansion and contraction of exhaust sonics through the system. Result is a flow increase of nearly 10%! The outer chamber in the Powerbomb allows the air to expand, cool and ramp back up at a higher velocity. Additionally, the PowerBomb is a “pre-muffler” of sorts which helps to lower the bikes sound output by providing more sound absorbing surface area for the sound medium (exhaust gases). On some models, you can choose between a moto or supercross version. The supercross version is designed for more low to mid-range power where the moto version is focused in the mid to upper RPM range."

[dpl096]

Originally Posted by Azhule

They are probably just 'designed' it to 'look or perform' like the FMF PowerBomb Header... the 'bulge' is the supposed to 'increase HP/Torque while lowering sound/DB levels'...

"The redesigned PowerBomb is a four-stroke header that incorporates FMF’s patented PowerBomb module at a precise location in the initial stage of the header. By positioning this “Bomb” at a key point in the system, increased performance and flow is achieved through the expansion and contraction of exhaust sonics through the system. Result is a flow increase of nearly 10%! The outer chamber in the Powerbomb allows the air to expand, cool and ramp back up at a higher velocity. Additionally, the PowerBomb is a “pre-muffler” of sorts which helps to lower the bikes sound output by providing more sound absorbing surface area for the sound medium (exhaust gases). On some models, you can choose between a moto or supercross version. The supercross version is designed for more low to mid-range power where the moto version is focused in the mid to upper RPM range."

makes sense .... We all know the results of straight pipes. Really cool until that skull splitting headache kicks in from listening to that nonsense for a few hours.

[Wolftrax]

Originally Posted by dpl096

makes sense .... We all know the results of straight pipes. Really cool until that skull splitting headache kicks in from listening to that nonsense for a few hours.

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