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Thread: Aprilia SR 125 (172cc) exhaust options?

  1. #1
    apriliaforum newb
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    Oct 2017
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    Aprilia SR 125 (172cc) exhaust options?

    Aprilia sr125 tuned - 25mm carb, v force reeds, lc flywheel/stator/cdi not yet mounted.


    I want low end grunt. I can't find any good replacements. Consensus seem to be: Avoid PM Tuning exhausts

    Gilera 180cc stock exhaust is very good according to dynos below, but does it fit ac engine?
    Is my 125cc exhaust same/comparable to the 180cc stock exhaust?
    Catalyzed is supposed to suck, how can I tell if it is cat?
    How can I tell if my bike has stock exhaust?




    Charts that confirm stock 180 exhaust is probably best. Great resource btw:
    http://www.bike-equipment.net/07_die...pinsmoke1.html
    http://www.bike-equipment.net/07_die...pinsmoke2.html
    http://www.bike-equipment.net/07_die...pinsmoke3.html
    http://www.bike-equipment.net/07_die...pinsmoke4.html
    http://www.bike-equipment.net/07_die...pinsmoke5.html
    http://www.bike-equipment.net/07_die...pinsmoke6.html




    Keywords: Gilera runner 180 exhaust, aprilia sr125 exhaust, aprilia sr150 exhaust


    * - 172cc bbk, 25mm carb, v force reeds, lc flywheel/stator/cdi. Stock 125 exhaust.

  2. #2
    apriliaforum expert
    Join Date
    Jun 2013
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    2,205
    the 180cc exhaust fits the 125 and 150 engine
    and works really good, all of the sp180s have a catalyzed exhaust the only exhaust that has no catalyzator is from the hexagon

    dont worry about the cat it can be removed easily if its clogged

    for other pipes that work goodyou can take the technigas and gianelli cheaper pipes that dont have the resonant whine and high eng power but are made to produce low end torque

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