KymcoForum.com
Scooters - 50cc => Agility 50 => Topic started by: Scooter Russ on August 29, 2012, 01:10:51 PM
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Does anyone know if the factory Agility exhaust has a restrictor cone right where exhaust bolts to head???? I've heard you guys talking about it for some after market exhausts. Didn't know if original was same way.
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Funny you mention that I have a friend that had cut the back of the pipe off his muffler because he said it was at the end of the pipe. but now he took and cut the pipe right in half cleaned it out and welded back together and that thing flys................no big bore or anything just all the mods jets cdi and boss.
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Does anyone know if the factory Agility exhaust has a restrictor cone right where exhaust bolts to head???? I've heard you guys talking about it for some after market exhausts. Didn't know if original was same way.
I dont think it does, i havent seen it, think its just a small bore downpipe. When i swapped mine to the Leo Vince i saw that was a larger diameter pipe.
I still got my old stock pipe in my garage so if im in there tonite or the next few days i'll look, if i remember.
If he cleaned out all tbe baffles in the backbox part Blue then that would help the air flow out better.
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Exhaust values make a very minimal difference in a 4 stroke engine . Good luck .
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Exhaust values make a very minimal difference in a 4 stroke engine . Good luck .
+1
Apart from making them LOUDER ;D
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Well this weekend I plan on fixing my carb issue and putting on a muffler I found thru my local auto parts store. It's 1 3/8 in. id. 12 in. long muffler cassing 22in. oal. Completely free flow exhaust, I mean you can see daylight thru this bad boy. i'm going to build larger pipe from head to muffler as well.
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Well this weekend I plan on fixing my carb issue and putting on a muffler I found thru my local auto parts store. It's 1 3/8 in. id. 12 in. long muffler cassing 22in. oal. Completely free flow exhaust, I mean you can see daylight thru this bad boy. i'm going to build larger pipe from head to muffler as well.
Sounds cool. Remember to post up some pics once its done :)
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Can do Streido
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With a single cylinder 4T engine the right diameter and length of the pipe from the head to the muffler is quite important... (but after this piece of pipe you can probably do pretty much whatever you want, mufflers seem optional from a power point of view....)
The length of this part determines at what rpm the low pressure "echo" of the high pressure pulse from the opening of the exhaust valve helps emptying the cylinder during the valve overlap part of the cycle.. And you want this to correspond with your camshaft timing if you want to have maximum power....
The diameter determines the speed of the exhaust gasses and therefore the amount that the inertia of these gasses helps emptying the cylinder. Here, the trade off is between the benefits of exhaust gas speed and the losses from flow resistance.. The optimum is dependent on displacement and, again, camshaft timing...
A larger diameter or shorter pipe will move the peak in the torque/rpm graph to a higher rpm, but when the camshaft timing isn't altered, it might as well lower this peak in strength, probably also lowering your peak power even while it's at a higher rpm...
So : unless you have a non-stock camshaft or a BBK you should keep the length and diameter of the pipe between the head and the muffler about the same as stock, assuming Kymco has correctly tuned these parts to work together, which you will only find out by trying something else of course... ;D
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..there is no exhaust restrictor cone in 4t scoots...no need for one...
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...no need for one...
Amen to that... Dam thing is tiny enough already.. :D
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Dam thing is tiny enough already..
..yeah, thats whut she said!..
:-*
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... :'( .....
It swells up nice tho... :D
That's another reason why I eat pussy so dam good. Gots to have a back-up.... ;) :D ::)
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...no need for one...
Amen to that... Dam thing is tiny enough already.. :D
Just for you.
(http://www.apesnort.com/images/large//grower-not-shower-sw-blue_525.jpg)
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Oh snap.......
... :o :D :D :D :D
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Ok thanks for the info Wordslinger!
BTW on a side note you guys are some funny mother f@#$@*'s on here!
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BTW on a side note you guys are some funny mother f@#$@*'s on here!
HEY.... I resemble that remark...... :D :D :D
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..we try to have a good time here, yup...
..and we try to say what weve seen, too..
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if you carefully study the stock exzuast you will see that there are two diameters. you have the original dia on the outside but you also have a inner metal sleeve that narrows the the pipe (therefore restricting) dont know how you would go about removing it. plus there is a catalytic convertor in the main muffler on newer models, removing this will also have benefits but you may have trouble with emmisions tests.
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...i removed the cat from my 08 a50 exhaust...a bit of the baffle as well..
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Well wordslinger my scoot is an 08 agility! So will my scoots exhaust be like this if it's a USA model?
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..yes it will russ...exactly!!
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Thx Wordslinger!!!!!
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1st time i saw into a stock exhaust, cool. Saves me cutting open my old stock one to see. :)