Stock Ports: Am I Privileged?

Discussion in '2-Stroke Engines' started by thedirekter, Apr 27, 2014.

  1. thedirekter

    thedirekter New Member

    So I opened up my motor after the first tank to see how everything was looking and to clean out the ports, and was quite surprised when I looked inside! I've seen some ports from other people's jugs and many look miserable; slag everywhere, tiny, rectangular ports, burs, you name it. When I opened mine up to see what kind of monstrosity I was going to be faced with, I let out a huge sigh of relief. There are a few burs on the intake, but I cleaned them up so we'll see if there's any improvement. I was able to do about 30mph flat just on the first tank with no modifications, and I attribute that to my already, largely clean, and rounded out ports. Has anyone else gotten this clean of ports from stock? And would opening them up further be worth my time? I do have another jug on the way so I can experiment with porting, but I may just leave this one as-is for a backup if I over-work the new one.

    One other question I had was whether or not you guys' intake ports are angled like these, or are they just straight shots like the exhaust, but lower on the jug?



  2. butterbean

    butterbean Well-Known Member

    I don't know, but those gaskets look like crap.
  3. jaguar

    jaguar Well-Known Member

    yes the intake is normally at an angle.
    no, cleaning up little burs will not make a difference on a low RPM engine such as this.
    Porting/pipe/compression/carb make a difference
  4. thedirekter

    thedirekter New Member

    That junk is just the leftovers from peeling them off. Gross, I know.

    I figured cleaning the burs up wouldn't do much, just make em a little smoother. I've been looking at a looooot of your posts Jag and really enjoy the work you do! I'll be building a torque pipe once I start my welding classes, and will be following a lot of your info about porting, compression, etc. Cheers!
  5. HeadSmess

    HeadSmess Well-Known Member

    removing any obstruction to flow will help, and removing any sources of turbulence in the air flow is also a nice idea.

    but if thats a stock port...oh my.

    but, then...the transfers are the hard ones to get to ;)
  6. Fabian

    Fabian Well-Known Member

    I run 25:1 and have never experienced exhaust port slag (as it is so called); with all my engines always having clean ports, despite the cry that 25:1 slags up your engine; more so, that i use the cheapest 2-stroke oil i can find, and i still get 4,000 kilometers out of a cylinder and 10,000 kilometers out of a bottom end.