Smaller Header Pipes

[Drew]

This got me wondering about doing the same to the CBR. Could I improve performance by making header pipes that were made of smaller tube metal or is there a lot of other things you would have to modify to benefit from this that they didn't mention?

If you have a look at the size of the headers on, say an old GSX 750 or any early eighties bike, compared to what is on your bike, you should see that those tricky little aisian fellows have got their finger on the pulse. My 87 fizzer pipes, are inch and a quarter, my mates GSX, inch and three quarters. And there is a marked power difference between the two.

[WINJA]

Sure thing, my services of the roof-painting variety cost around $20 an hour.

$20 , FUCK OFF

[John]

$20 , FUCK OFF

Gimmie some speights and I will HELP paint your roof, min = 24.

[Drew]

As "Vance and Hines" say, alter the exhaust then you must re jet the carbs to gain the benefits or you will be worse off.

Can't be true, I made my own end can, and got more poke all the way through the revs.
And that is just a chunk of two inch perferated pipe, inside a four inch stainless sleeve, packed with pink batts.

[SPORK]

$20 , FUCK OFF

Ok, ok, I'll do it for a ZXR250C

[John]

Can't be true, I made my own end can, and got more poke all the way through the revs.
And that is just a chunk of two inch perferated pipe, inside a four inch stainless sleeve, packed with pink batts.

How does that sound?..

[Drew]

Gimmie some speights and I will HELP paint your roof, min = 24.

Speights pays for all I'm with you !

[Drew]

How does that sound?..

Actually sounds really good, deep and not too loud

[Drew]

Here is a pic if you are interested

[John]

Here is a pic if you are interested

Sweet! I've done the same thing - Cant wait to hear it - your can looks nice n'tidy

[WINJA]

Actually sounds really good, deep and not too loud

HEY IF YOU EVER FIND THE MUFFLER IS TO LOUD YOU JUST ADD MORE HOLES TO THE PERF OF VARYING SIZES , I HAVE NO SCIENTIFIC PROOF BUT I THINK IT
WORKS CAUSE DIFFERENT SOUND WAVES GO THRU DIFFERENT SIZED HOLES BETTER ,THIS CAN SOMETIMES TAKEAWAY THE HARSHNESS OR RASPY SOUND FROM SOME BIKES, ALSO DONT UNDER PACK OR OVER PACK THE MUFFLER.

[Drew]

Sweet! I've done the same thing - Cant wait to hear it - your can looks nice n'tidy

Came up all right, woulda looked better if I could have use polished pipe, instead of brush finish, but the father in law works at a scrap yard, so I took what was free.

[Drew]

HEY IF YOU EVER FIND THE MUFFLER IS TO LOUD YOU JUST ADD MORE HOLES TO THE PERF OF VARYING SIZES , I HAVE NO SCIENTIFIC PROOF BUT I THINK IT
WORKS CAUSE DIFFERENT SOUND WAVES GO THRU DIFFERENT SIZED HOLES BETTER ,THIS CAN SOMETIMES TAKEAWAY THE HARSHNESS OR RASPY SOUND FROM SOME BIKES, ALSO DONT UNDER PACK OR OVER PACK THE MUFFLER.

I packed it in as tight as it would go, but that is cos I used pink batts, of the common wall variety, and I wanted it to work.

[Coyote]

I was told by a few mates at school (so this probebly isn't the most reliable info I've been given) that there's likely to be baffles in the header pipes. This true? If I made a replica set of header pipes without baffles, would this change performance for better or for worse?

[John]

Baffles are placed in a controlled area where they will be most benificial to both the high and low end, the can, some headers have kinks in them that provide a baffle type effect... But not to the same level..

Screw the crap, get the can, gut it, shove a perferated tube in it and run away laughing...