C-Kells zuma

It's show and tell for your custom scoot! Post photos of your project scooters, etc.

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Enviromoto
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Postby Enviromoto » Wed May 12, 2010 12:39 pm

zombie wrote:(.)(.) The only answer I have is (.)(.)


Banned :lol:

C-kell
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Postby C-kell » Sun May 16, 2010 12:46 pm

2strokd wrote:Got any pics of the "hand coned adjustable exhaust"?
Sounds interesting! That frame brace is STOUT :D !!!
No pics.We havent made it yet.My friend makes them for banshees and trx's.To get the most out of it I would assume you would need a dyno.It consist of a male and female center section so you can adjust the tuned length.
C-Kell

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2strokd
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Location: Lafayette IN

Postby 2strokd » Sun May 16, 2010 1:47 pm

That is pretty cool man!
Got any pics of that :) ?
The CVT is seriously underestimated by some!
01 CPI Misketo MZ49cc to70 to103cc-Drag scooter
03 Kymco Cobra (SF10)49cc- Daily driver

C-kell
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Joined: Tue Jul 28, 2009 6:27 pm

Postby C-kell » Sun May 16, 2010 1:59 pm

2strokd wrote:That is pretty cool man!
Got any pics of that :) ?
Ya it is cool.I had never even heard of adjustable exhaust before I met Arlan.I dont think there are any pics of an adjustable exhaust but this is his site.http://www.ledperformanceengines.com/
C-Kell

190mech
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Postby 190mech » Sun May 16, 2010 6:36 pm

Didnt they use the sliding spacer pipes in the Kart world?Seem to remember how they were cable operated with a spring loaded return..

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Mexicano
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Postby Mexicano » Sun May 16, 2010 8:05 pm

190mech wrote:Didnt they use the sliding spacer pipes in the Kart world?Seem to remember how they were cable operated with a spring loaded return..


Yes, same was used in radio control airplanes with 2 t engines..
‘There is only one secret in scooter tuning – to know what you are doing and do it thoroughly’

C-kell
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Postby C-kell » Sun May 16, 2010 8:33 pm

Cool.So do the exhaust for the karts and R.C.s constantly adjust with more or less throttle?We are making one that is adjustable but not that crazy.It wont be continuously moving.
C-Kell

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Mexicano
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Postby Mexicano » Sun May 16, 2010 8:58 pm

C-kell wrote:Cool.So do the exhaust for the karts and R.C.s constantly adjust with more or less throttle?We are making one that is adjustable but not that crazy.It wont be continuously moving.


Well...those RC exhaust that I had 15 years ago didn't adjust with throttle position, just had some sort of "wing nuts" to adjust to engine bast performance, the header lenght could also be adjusted with a kind of "rubber tube".
‘There is only one secret in scooter tuning – to know what you are doing and do it thoroughly’

C-kell
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Postby C-kell » Sun May 16, 2010 9:51 pm

Mexicano wrote:
C-kell wrote:Cool.So do the exhaust for the karts and R.C.s constantly adjust with more or less throttle?We are making one that is adjustable but not that crazy.It wont be continuously moving.


Well...those RC exhaust that I had 15 years ago didn't adjust with throttle position, just had some sort of "wing nuts" to adjust to engine bast performance, the header lenght could also be adjusted with a kind of "rubber tube".
Yup.That pretty much what Im making minus the header adjustability.Thanks for the enlightenment though.I didnt know that kind of stuff was available for RCs or karts and now I do.
C-Kell

190mech
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Postby 190mech » Mon May 17, 2010 4:47 am

Kart guys had a lever to move the mid section,longer for the twisties,short for the straights.This is from years ago,dont know if its still done with the
pipe technology advances lately..

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2strokd
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Location: Lafayette IN

Postby 2strokd » Mon May 17, 2010 9:54 am

Makes so much sense tho..
Hhhhmm, an adjustable pipe and variable valve,
oopps i mean port timing. Now that would be sweet!
The CVT is seriously underestimated by some!

01 CPI Misketo MZ49cc to70 to103cc-Drag scooter

03 Kymco Cobra (SF10)49cc- Daily driver

C-kell
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Joined: Tue Jul 28, 2009 6:27 pm

Postby C-kell » Mon May 17, 2010 8:50 pm

2strokd wrote:Makes so much sense tho..
Hhhhmm, an adjustable pipe and variable valve,
oopps i mean port timing. Now that would be sweet!
Oh ya.I forgot about power valve engines.They use them in quads.Has anyone ever seen them in scoots?
C-Kell

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2strokd
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Location: Lafayette IN

Postby 2strokd » Tue May 18, 2010 12:12 pm

No but i have rebuilt a 2T on dirtbike with one. Very neat concept. Like having an adjustable power band.
The CVT is seriously underestimated by some!

01 CPI Misketo MZ49cc to70 to103cc-Drag scooter

03 Kymco Cobra (SF10)49cc- Daily driver

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Mexicano
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Joined: Thu Jul 12, 2007 11:31 pm
Location: Mexico

Postby Mexicano » Tue May 18, 2010 12:28 pm

C-kell wrote:Oh ya.I forgot about power valve engines.They use them in quads.Has anyone ever seen them in scoots?


There are different Power Valve Systems, depend on the manufactures, Honda had a "V-tacs" (Variable Torque Amplification Chamber System) on their Honda RC 50 years ago....

Soeone told me that the YPVS (Yamaha power valve system) is the most reliable system out there...

Regards,
‘There is only one secret in scooter tuning – to know what you are doing and do it thoroughly’

190mech
Posts: 279
Joined: Thu Oct 01, 2009 8:15 pm

Postby 190mech » Tue Jun 01, 2010 8:32 pm

Found this link on adjustable pipe tech,pretty interesting!
http://www.muller.net/mullermachine/docs/slippy1.html


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