Full system carbon fibre shortie twin exhaust for Hyosung GT650

[Lurch]

fuel injected 125 v-twin, what a bucket racer that would make!

It would be a very impressive 3 or 4 laps.

[Ronin]

fuel injected 125 v-twin, what a bucket racer that would make!

Dry mass of 166 kgs and 14.5 hp. Hmmmm

[ital916]

Err, yes it does.
Two strokes have tiny pipes. Small 4 strokes have small pipes. Large 4 strokes have large pipes. It's all about airflow and backpressure. A big bike with a small pipe is going to be seriously restricted...

Sigh. Its mainly about header pipe design.

A lot of the time it boils down to emissions control and noise control.

Someone tell the guys at yamaha, honda and suzuki they have it wrong, they need to chuck a bigger pipe on it.

[Slyer]

Sigh. Its mainly about header pipe design.

A lot of the time it boils down to emissions control and noise control.

Someone tell the guys at yamaha, honda and suzuki they have it wrong, they need to chuck a bigger pipe on it.

Sigh @ you. I AM talking about header pipes. Did I say anything about exhaust, can or muffler?

[R6_kid:Me]

Sigh. Its mainly about header pipe design.

A lot of the time it boils down to emissions control and noise control.

Someone tell the guys at yamaha, honda and suzuki they have it wrong, they need to chuck a bigger pipe on it.

All good bro. But this system from the Hyobag 125 on your old CBR11000XX overkill and see how it runs.

It's actually more about airflow, exhaust velocities, back pressure and a myriad of other things. But bottom line is that if the internal diameter of an exhaust pipe is too big or too small then you're bike will run like a bag of shit and ultimately you will lose power and potentially over time cause excessive and unnecessary wear to your engine.

[ital916]

Err, yes it does.
Two strokes have tiny pipes. Small 4 strokes have small pipes. Large 4 strokes have large pipes. It's all about airflow and backpressure. A big bike with a small pipe is going to be seriously restricted...

Sorry sam, I assumed from your wording here that you were talking about mufflers; otherwise it still isn't making sense, two stroke pipes headers and expansion chambers are definately not always small on small capacity two strokes, neither neccessarily are their mufflers (gt750s dont have small pipes).

I was merely saying you cannot use big or small as dimensional guidelines based on capacticy. I won't continue typing, you are a smart lad. You can think up some examples.

It is like saying (and I apologise for the racial sterotyping) that all asians have tiny penises, all white poeple have small penises compared to african americans who have big penises.

Note: I wasn't referring to the picture of the gtr250 at all in my comments

[ital916]

All good bro. But this system from the Hyobag 125 on your old CBR11000XX overkill and see how it runs.

It's actually more about airflow, exhaust velocities, back pressure and a myriad of other things. But bottom line is that if the internal diameter of an exhaust pipe is too big or too small then you're bike will run like a bag of shit and ultimately you will lose power and potentially over time cause excessive and unnecessary wear to your engine.

I didnt say ti would dude, I was just saying that you can't generalise like how sam did.