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Uma Racing Backpressure Exhaust Opinion

Discussion in 'T150 & T135 General Topics' started by usin_kangkong, Jan 11, 2017.

  1. usin_kangkong

    usin_kangkong New Member

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    Hello guys and girls,

    Would like to hear your opinions and advice, on whether the UMA Racing Backpressure Exhaust is suitable for a bike with the following specs:

    1. 63mm CMS Racing Block with FJN Piston set
    2. SCK Racing Camshaft
    3. SCK Racing Valve springs.
    4. BRT 19/22 Head set Port and Polished
    5. API Tech Standalone ECM
    6. Mikuni 32mm Throttle Body
    7. Uma Racing 160cc Injector
    8. CJ Ipoh VMB Standard-Cut Exhaust without stopper

    The problem is with my current exhaust, it is too loud :(
    My neighbours are angry, my wife is angry, even other motorist on the highway are angry at me.
    So I would like to have another set of performance exhaust without too much lose of power, and most important, not too noisy! :D

    Cheers!
     
  2.  
  3. boldstardex

    boldstardex Moderator

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    double post bro.
     
  4. usin_kangkong

    usin_kangkong New Member

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    How do I delete this double post :(

    Sorry for asking
     
    Last edited: Jan 16, 2017
  5. ryems1

    ryems1 New Member

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    bos san nkkbili ng uma back pressure exhaust?my png smx135 yn db? peo 150cc block or pasok ba ung stock pipe ng smxking sa smx135?
     
  6. boldstardex

    boldstardex Moderator

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    you are on an ENGLISH SPEAKING thread.
     
    jangbest and usin_kangkong like this.
  7. man_sate

    man_sate Super Veteran

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    Hi,
    Never tried UMA Backpressure Exhaust or have experience on it. From the spec sheet it show a good performance and noise.
    Did you try to improve your exhaust noise?
    Adding white fiber inside the muffler help to reduce noise and don't put yellow fiber because it will disappear in a very short time.
     
    usin_kangkong likes this.
  8. usin_kangkong

    usin_kangkong New Member

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    Improve exhaust noise as in make it less noisier?
    Yes the exhaust do come with the white fibre as well.
    I had tried smaller diameter silencer of size 38mm together with a stopper, but had a massive decrease in performance, less pull during acceleration.
    Noise become more tolerable, but the performance decrease made it kinda not syiokk enough huhuhuu

    Thinking of trying the Uma Exhaust later, but seeing even the free-flow exhaust only with a bit stopper already decreased performance by a lot, I think perhaps the UMA Exhaust performance will be far worst.

    Will make do by wearing ear plug for now, killing off engine in traffic light, and ignoring the other angry road user :p
     
  9. man_sate

    man_sate Super Veteran

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    Standard cj ipoh will come with white fibre but in small amount. You can fill in 2 or 3 more. Just use standard silencer and fill it with white fibre until it full.
    If you want to change exhaust. You can try Kozi brand.
    My friend buy it 2 weeks ago since cj ipoh stock finish. The sound is less then cj ipoh bike. The price also less than cj ipoh. Quality is same like cj ipoh.
     
    Last edited: Jan 19, 2017
  10. usin_kangkong

    usin_kangkong New Member

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    Good idea, put more white fibre yeaa understood will do thank you very much for your advice <3
     
  11. 20vturbo

    20vturbo New Member

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    Try AHM
     
  12. ❤️Rap❤️BR

    ❤️Rap❤️BR New Member

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    Sir sate, Can ahm full titanium fit on my smx135 200cc? Is it for open spec?Thanks. Ridesafe.
     
  13. man_sate

    man_sate Super Veteran

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    Yes it would be better. Ahm is excellent exhaust for performance or you can try leo vince.
     
  14. ❤️Rap❤️BR

    ❤️Rap❤️BR New Member

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    This is my latest mod bro
    Uma superhead sport version
    Uma 65mm borekit
    Uma hyperclutch
    Uma carburetor 32MM
    Uma friction clutch plate
    Uma quick mission gear set 5speed
    Uma oil pump
    Faito bearing S720 friction less
    Brt dualband cdi
    Faito ignition coil
    Precision crank
    He's still on process right now, I hope he will be a beast. Hehe thank you paps. I'll buy the ahm. Thanks bro
     
  15. VinhLuu

    VinhLuu New Member

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    Hello guys and girls,

    I have had problems with ecu map apitech 9.1, can you send me the custom map with no such configuration parameters, thanks...!!!


    1. 62mm YCS Racing Block with FJN Piston set
    2. SCK Racing Camshaft 5.7mm
    3. MCS Racing Valve springs.
    4. YCS 20/23 Head set Port and Polished
    5. API Tech Standalone ECM 9.1
    6. SWR CNC 34mm Throttle Body
    7. TR Racing 180cc Injector
    8. UMA Racing Exhaust

    Tks So much...!
     

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