MS290 muffler mod

Post in 'The Gear' started by ikessky, Jan 18, 2010.

Thread Status:
Not open for further replies.
  1. ikessky

    ikessky
    Expand Collapse
    Minister of Fire

    Joined:
    Sep 2, 2008
    Messages:
    862
    Likes Received:
    24
    Loc:
    Northern WI
    I think I'll fine tune it and call it good with what I've already done. It is an improvement over stock and that's good enough for me. Heck, just having the limiter tabs gone and being able to fully tune it is an improvement over stock!
     
    Collapse Signature Expand Signature

    Helpful Sponsor Ads!





  2. ikessky

    ikessky
    Expand Collapse
    Minister of Fire

    Joined:
    Sep 2, 2008
    Messages:
    862
    Likes Received:
    24
    Loc:
    Northern WI
    Just an update. Took the saw out this AM and tested it and tuned it some more on some decent hardwood that my FIL had sitting in his pile. Once the saw started, I let it idle for a few minutes and then reved it a little so that I would be working with a warm engine and could get a good tune. Next I made some light cuts and then let it idle a little more. Finally, I cracked it wide open and got a nice little four stroking sound. I leaned it out, the richened it up until I was back to the four stroking/rough sound. Then, I went at some pieces of wood. Right now, when I got WOT, the saw four strokes. As soon as you get it into the wood, it smooths out until you pull out of the cut. So, from everything I can find, I should be tuned perfectly now.
     
    Collapse Signature Expand Signature
  3. smokinj

    smokinj
    Expand Collapse
    Minister of Fire

    Joined:
    Aug 11, 2008
    Messages:
    15,981
    Likes Received:
    1,412
    Loc:
    Anderson, Indiana
    yes sir perfect as it gets
     
    Collapse Signature Expand Signature
  4. ikessky

    ikessky
    Expand Collapse
    Minister of Fire

    Joined:
    Sep 2, 2008
    Messages:
    862
    Likes Received:
    24
    Loc:
    Northern WI
    Probably would have been an even more noticeable change had I sharpened the chain before hand! Can't wait to try a full chisel once I start cutting in a month or so.
     
    Collapse Signature Expand Signature
  5. smokinj

    smokinj
    Expand Collapse
    Minister of Fire

    Joined:
    Aug 11, 2008
    Messages:
    15,981
    Likes Received:
    1,412
    Loc:
    Anderson, Indiana
    full chisel will make a big difference as well, should be a nice set up.
     
    Collapse Signature Expand Signature
  6. ikessky

    ikessky
    Expand Collapse
    Minister of Fire

    Joined:
    Sep 2, 2008
    Messages:
    862
    Likes Received:
    24
    Loc:
    Northern WI
    A buddy from work was going to look at the 290's this weekend. Hopefully he picks one up so I can see how mine runs vs his.
     
    Collapse Signature Expand Signature
  7. Highbeam

    Highbeam
    Expand Collapse
    Minister of Fire

    Joined:
    Dec 28, 2006
    Messages:
    11,415
    Likes Received:
    1,804
    Loc:
    Cascade Foothills, WA
    I own and have been arond lots of 4stroke bikes. Is this term "four stroking" the sound of a 4stroke bounding off the rev limiter? Kinda of a bouncy na-na-na-na sound? Ther term four stroking isn't very descriptive.
     
    Collapse Signature Expand Signature
  8. ikessky

    ikessky
    Expand Collapse
    Minister of Fire

    Joined:
    Sep 2, 2008
    Messages:
    862
    Likes Received:
    24
    Loc:
    Northern WI
    Kind of, I guess. Fiddle around with your H screw while the saw is at WOT once. When it's lean, it will sound very smooth. If you richen it up so that starts to sound "rough", that will be when it's four stroking. I guess Google it and see what you come up with. If you look at Madsen's page, they have some sound files that are very good.
     
    Collapse Signature Expand Signature
  9. Jamess67

    Jamess67
    Expand Collapse
    Feeling the Heat

    Joined:
    Nov 19, 2007
    Messages:
    347
    Likes Received:
    1
    Loc:
    Central Illinois
    doesnt all this make the saw ALOT louder???
     
    Collapse Signature Expand Signature
  10. ikessky

    ikessky
    Expand Collapse
    Minister of Fire

    Joined:
    Sep 2, 2008
    Messages:
    862
    Likes Received:
    24
    Loc:
    Northern WI
    Depends on how you do the muffler mod. On mine, the gases are still going through the baffle. It's a touch louder, but not very much. If you drill above the baffle and straight pipe it, then it will be quite a bit louder. In reality though, we should all be wearing hearing protection when running the saws.
     
    Collapse Signature Expand Signature
  11. Jamess67

    Jamess67
    Expand Collapse
    Feeling the Heat

    Joined:
    Nov 19, 2007
    Messages:
    347
    Likes Received:
    1
    Loc:
    Central Illinois
    I do wear full protective gear. I just dont want the neighbors complaining.
     
    Collapse Signature Expand Signature
  12. ikessky

    ikessky
    Expand Collapse
    Minister of Fire

    Joined:
    Sep 2, 2008
    Messages:
    862
    Likes Received:
    24
    Loc:
    Northern WI
    Mine is a little louder, but not overly obnoxious. I turned the two existing slots into one larger slot and then opened up the deflector a little. The exhaust still goes through the baffle, which is really what kills the sound.
     
    Collapse Signature Expand Signature
  13. southbound

    southbound
    Expand Collapse
    Minister of Fire

    Joined:
    May 26, 2008
    Messages:
    733
    Likes Received:
    3
    Loc:
    mid south tn
    My MS 290 did get a little louder but it is not bad at all.. Now the muffler I just had modded for my 064 is going to be a screamer.....

    [​IMG]

    [​IMG]

    The second port...
    [​IMG]
     
  14. smokinj

    smokinj
    Expand Collapse
    Minister of Fire

    Joined:
    Aug 11, 2008
    Messages:
    15,981
    Likes Received:
    1,412
    Loc:
    Anderson, Indiana
    nice job southbound
     
    Collapse Signature Expand Signature
  15. southbound

    southbound
    Expand Collapse
    Minister of Fire

    Joined:
    May 26, 2008
    Messages:
    733
    Likes Received:
    3
    Loc:
    mid south tn
    Thanks but I did not do it I had a member from another forum do it up for me...
     
  16. smokinj

    smokinj
    Expand Collapse
    Minister of Fire

    Joined:
    Aug 11, 2008
    Messages:
    15,981
    Likes Received:
    1,412
    Loc:
    Anderson, Indiana
    who was it brad?
     
    Collapse Signature Expand Signature
  17. southbound

    southbound
    Expand Collapse
    Minister of Fire

    Joined:
    May 26, 2008
    Messages:
    733
    Likes Received:
    3
    Loc:
    mid south tn
    Nope Evan.....
     
  18. smokinj

    smokinj
    Expand Collapse
    Minister of Fire

    Joined:
    Aug 11, 2008
    Messages:
    15,981
    Likes Received:
    1,412
    Loc:
    Anderson, Indiana
    I know of him and thats some nice work.
     
    Collapse Signature Expand Signature
  19. ikessky

    ikessky
    Expand Collapse
    Minister of Fire

    Joined:
    Sep 2, 2008
    Messages:
    862
    Likes Received:
    24
    Loc:
    Northern WI
    Nice! I'm thinking about starting to look for a 440 that needs a rebuild. I think a dual port muffler will be in order for that one.
     
    Collapse Signature Expand Signature
  20. southbound

    southbound
    Expand Collapse
    Minister of Fire

    Joined:
    May 26, 2008
    Messages:
    733
    Likes Received:
    3
    Loc:
    mid south tn
    I'm happy with it...

    [​IMG]

    [​IMG]
     
  21. smokinj

    smokinj
    Expand Collapse
    Minister of Fire

    Joined:
    Aug 11, 2008
    Messages:
    15,981
    Likes Received:
    1,412
    Loc:
    Anderson, Indiana
    Ok who put them big dawgs on there?
     
    Collapse Signature Expand Signature
  22. southbound

    southbound
    Expand Collapse
    Minister of Fire

    Joined:
    May 26, 2008
    Messages:
    733
    Likes Received:
    3
    Loc:
    mid south tn
    They came with the saw...
     
  23. smokinj

    smokinj
    Expand Collapse
    Minister of Fire

    Joined:
    Aug 11, 2008
    Messages:
    15,981
    Likes Received:
    1,412
    Loc:
    Anderson, Indiana
    The way I cut its much quicker with the bump strips and you get more out of your bar, Unless your just felling most of the time.
     
    Collapse Signature Expand Signature
  24. southbound

    southbound
    Expand Collapse
    Minister of Fire

    Joined:
    May 26, 2008
    Messages:
    733
    Likes Received:
    3
    Loc:
    mid south tn
    I have no need for this 064 I traded a 031 rear handle for what was supposed to be a running 066..It turned out to be a 064 with a bad P&C...
    So this saw will be my felling saw for the big stuff the 038 wont like...
     
  25. ikessky

    ikessky
    Expand Collapse
    Minister of Fire

    Joined:
    Sep 2, 2008
    Messages:
    862
    Likes Received:
    24
    Loc:
    Northern WI
    I have no need for a 440 either. ;) But why not? I won't get serious about a different saw until the kids can start cutting with me.
     
    Collapse Signature Expand Signature
Thread Status:
Not open for further replies.

Share This Page