SBP Muffler vs Honda CR80 Expansion Chambers

Discussion in 'Intake & Exhaust' started by Keef B, Jan 7, 2016.

  1. Keef B

    Keef B New Member

    Joined:
    Dec 30, 2015
    Messages:
    19
    Likes Received:
    0
    Fellas,

    First and foremost this site is like a godsend for me.. I can sit and talk bikes all day and pass the time at work. hahahahahahaaaa But wanted to get your thoughts on the SBP expansion chamber vs the Honda CR80 expansion chamber. Now from my understanding bigger is better, so i was thinking the Honda CR80 would be the best bet. But after doing some research I i seen this SBP expansion chamber and according the to the site its specifically tuned for the china girl engines.. So my fellow bike brothers please shower me with your knowledge.. it would be greatly appreciated.
     
  2. xseler

    xseler Active Member

    Joined:
    Apr 14, 2013
    Messages:
    2,620
    Likes Received:
    21
  3. Bikeguy Joe

    Bikeguy Joe Godfather of Motorized Bicycles

    Joined:
    Jan 8, 2008
    Messages:
    11,529
    Likes Received:
    1
    Unless you can get the Honda pipe for next to nothing to experiment with, I'd go with the SBP pipe.
    People have used moped pipes, or chambers made for mopeds too.
     
  4. bairdco

    bairdco a guy who makes cool bikes

    Joined:
    Aug 18, 2009
    Messages:
    6,322
    Likes Received:
    2
    The SBP pipes, in my experience, work great on mostly stock engines, as a bolt on upgrade. Once you start adding big carbs, performance heads, enlarging ports and going for the max hp possible, you need a pipe twice the size.

    I modded a ktm pipe that's 6" at it's fattest point, and it worked great.

    There isn't a "one size fits all" pipe design out there. To truly get the most out of your particular engine, and to get the power band you want, you'll need to do a lot of experimenting.
     
    #4 bairdco, Jan 8, 2016
    Last edited: Jan 8, 2016
  5. Keef B

    Keef B New Member

    Joined:
    Dec 30, 2015
    Messages:
    19
    Likes Received:
    0
    Thanks @Bikeguy Joe and @Bairdco, @ bairdco your in socal like me. Where are you located?? I have a MC junkyard I'm going to visit soon and see if they have the CR80 pipe I need if not good ole e-bay should have one for sure just don't want to wait for it to be shipped..
     
  6. Chaz

    Chaz Active Member

    Joined:
    Jun 3, 2012
    Messages:
    847
    Likes Received:
    25
    You can also consider the yz80 pipe while you're at the junkyard. Something else to consider is the modified voodoo pipe from crmachine, link below. They also have other performance parts to look at. There's something to be said for a pre-fitted bolt on part. It can save you some time and headaches.

    http://www.shop.crmachine.com/category.sc?categoryId=21
     
  7. Bobo08

    Bobo08 New Member

    Joined:
    Jul 26, 2015
    Messages:
    3
    Likes Received:
    0
    I just installed the sbp x pipe on my 66 cc and i was amazed with the performance increase . Truly amazing . I have no other mods other the. NGK iridium, 6 cc head and a quick intake /exhaust matching . I weigh 220 on an old trek with 41 tooth . This pipe adds so much low end all I need is a 36thooth and I wouldn't wined up this engine so high to reach a decent speed. That all bieng said this pipe is specifically ment for those who don't like or know how to fabricate. It's easy to tune and easy to tell if you have it tuned . I am however curious what the dirt /pocket bike pipe would do . $74 this is the cheapest most notable bolt on mod and think you don't have a real China girl unless you put a decent x chamber on it . Love this thing.
     
  8. nates71dog@gmail.com

    Joined:
    Jan 29, 2016
    Messages:
    1
    Likes Received:
    0
    I just got a CR 80 exhaust and it was the difference between 40mph and 55mph on an uphill incline .It seemed to be built to suit on my GT80 from gasworks motors
     
  9. KCvale

    KCvale Active Member

    Joined:
    Feb 28, 2010
    Messages:
    3,840
    Likes Received:
    5
    For the SBP X-pipe the sections are tuned for a 48cc, for a 66cc cut the short copper straight piece in half.

    They work great and have a lot of flexibility to mount, but you really have understand how they as bigger is not always better, it all about timing.

    Follow the green gas in this animation of how they work.
    All an X pipe does is shove the wasted unburnt fuel back into the cylinder just before it fires...

    [​IMG]

    ...but man it's a big boost when tuned right ;-}
     

Share This Page