Exhaust kits for small engines

Discussion in 'Rack Mounted Engines' started by Porkchop, Apr 21, 2009.

  1. Porkchop

    Porkchop Member

    Hi all !
    I searched but did not find. I'm thinking seriously of buying a friction drive kit from Bikemotorparts.com. One of the recommended engines is from a gssoline powered auger from HarborFreight. I have that engine already. Does anyone know if there is an add on exhaust pipe/muffler kit for these small engines ? If so, please tell. Also, how about a different intake with like a cone filter. I don't know to much about that engine yet. I just took it out of the box 2 days ago and removed the auger portion from it. It looks almost identical to some of the other engines on Bikemotorparts web site.
    Thanks !

    ..... PC .....
     

  2. kerf

    kerf Guest

    Two stroke / four stroke / pictures would be good.
     
  3. fetor56

    fetor56 Guest

  4. kerf

    kerf Guest

    Thanks Fetor. IMO the TLE43 is not conducive to intake or exhaust mods due to the strato charging system and fixed jet carb. As to the Chinese clone, I would assume that the induction is a straight piston port, carb may or may not have adjustable jets. Mods may be possible but if it were me, I would stick with the stock engine.
    Two stroke mods are tricky without the correctly engineered parts and I would think they would be hard to come by for this engine. With a 52cc engine, torque should be adequate, especially with a friction drive. It will, in all likelihood, make a fine riding machine just as it is.
     
  5. 5-7HEAVEN

    5-7HEAVEN Guest

    Porkchop, if your engine is identical to my Mitsubishi 43cc, you have a few options.

    Check your carburetor first. If it's the dual-port model with no adjustable settings except idle speed, your engine might run lean with exhaust changes.

    One exhaust option is to just remove the flame arrestor in the stock muffler. Second is the "X-Can" aluminum exhaust. Another choice is to adapt the ADA S1 expansion pipe from davesmotors.com.

    The ADA pipe's exhaust manifold wouldn't slip onto my engine. I purchased the Trevor Simpson exhaust flange that fits the wider GP460/G62 engine ports. After a few minutes elongating the bolt holes, the flange bolted onto the Mitsubishi engine's export port.

    The ADA pipe's mounting bracket wouldn't clear the engine's top cover, so it had to be sawed off. Then after snipping off the muffler cover's top two slats, the pipe slipped onto the engine.

    The ADA pipe clears the Staton friction drive, but won't fit the Staton chain gear box.

    BTW, I just ordered the BMP friction drive kit. The GP460 should bolt onto it.
     
  6. Porkchop

    Porkchop Member

    Thanks for the replies. Let me be a little more specific. I'm looking for an exhaust system or something to reduce noise, and to direct the exhaust flow a little further away from me, not a performance enhancement. I have never started the engine, so i don't really know how it sounds. Like any other little weed trimmer or chain saw I imangine ! Will it be O.K. to just attach a straight pipe to the existing muffler just to redirect the exhaust in a different direction ? Thanks again !

    ..... PC .....
     
  7. kerf

    kerf Guest

    The engine will be on the left side of the bike with the muffler away from the rider. Don't know about your clone but the TLE43 is about the quietest engine I've tried.
     
  8. Happy Valley

    Happy Valley Active Member

    .....and then some.

    IIRC that engine is 52cc. It's gonna be loud, most weed whackers are 25 to 35cc.
     
  9. Porkchop

    Porkchop Member

    If you got to bikemotorparts.com, click on engine info, then scroll to the bottom of the page, you'll see the engine I'm talking about. It looks very similar to the Mitsubishi you mentioned.
    Thanks !
     
  10. kerf

    kerf Guest

    Size alone isn't necessarily a determining factor, 43cc Mits, quite - CY 46cc, chain saw, I mean headache loud.
     
  11. Happy Valley

    Happy Valley Active Member

    I'll resist commenting there but dang it ain't easy.......lol

    But seriously, you know the TLE43 underwent the dual port scavenging upgrade and Mits developed what they call the "whisper quiet" engine.

    The 52cc http://www.duropower.com/images/upload/products/x/DP52T.jpg is cloned to look similar but looks is about where that ends.
     
  12. kerf

    kerf Guest

    One way to find out, bolt that sucker to a bike and fire her up. Earplugs anyone?
     
  13. Happy Valley

    Happy Valley Active Member

    You made up a pretty nice looking noise suppressor awhile back didn't you Kerf, how's that worked out?
     
  14. seanhan

    seanhan Member

    It might not be worth it ...

    Your just adding more weight and something else that will need maintanace.
    I just dont see much gain to make it worth while..
    "IMO"
    :cool2:
     
  15. kerf

    kerf Guest

    It's still on the bike and I still got my hearing. Lost my mind but I can hear.
     
  16. Porkchop

    Porkchop Member

    I don't have a mounting kit yet and no clutch drum. You know what will happen if I start it with no clucth drum. Guess I could take the clutch shoes off, but that's actually more trouble to me than it's worth. I don't guess it really matters how loud it is, either I'll use it or not. And if I do, I'll just have to put up with it !
     
  17. 5-7HEAVEN

    5-7HEAVEN Guest

    JMO, the expansion pipes are light and worth their weight in power. There is no maintenance once you install it. Set it and forget it.

    The ADA Sl pipes on the Mits engines are quieter than the stock mufflers. On my front engine I use 39" of flexible rubber tubing to route the exhaust down to the crankset. I did not install a muffler and the sound is still not that objectionable.

    Porkchop, why would you want to start up the engine now? You could've run it when the auger was on it.

    Wait for the kit.
     
  18. Porkchop

    Porkchop Member

    You must have over-looked or misunderstood something on this thread. I have no intentons of starting that motor until I get it mounted. I saw a video of your build and remember the tube on your front engine. I'm only looking for someting that will work as a noise supressor. Not performance. The engine may be alright as is. I don't know. Haven't started it up yet. I'm just looking ahead for ideas !
    Thanks !
     
  19. fetor56

    fetor56 Guest

    I'm guessing the engines slightly louder than a compratable engine,but more torquey.
    I've got a Honda35 on my friction & it's LOUD...loud loud(and rattley)..........doesn't bother me that much though.
    Still contact BMP's for any feedback they have about this engine & possible accessories(eg,larger tank)
    "attach a straight pipe to the existing muffler just to redirect the exhaust"....if u want to.Personally i can't see the need for it cos the exhaust is directed to the side,but if your keen attach some angled tubing so any exhaust is directed rearwards.
     
    Last edited by a moderator: Apr 22, 2009
  20. Porkchop

    Porkchop Member

    Yeah, I'm just going to leave well enough alone until I get the mounting kit. The auger attachment was a pain to take off, and I'm not about to reinstall it just to start that engine. I can wait. I said in a previous thread that it probably took more time to take it off than it will take to install the whole friction drive kit ! Good idea about asking BMP for feedback ! Thanks !

    ..... PC .....
     
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