wht do you think??

Discussion in 'Yamaha' started by gizzy2014, Apr 13, 2013.

  1. 89blaster89

    89blaster89 Member

    Joined:
    Aug 26, 2011
    Messages:
    4,739
    Likes Received:
    25
    Trophy Points:
    80
    Location:
    Pacific northwest, washington
    ok get jets 270-340, one of those should do it for sure. jets are cheap so its ok to buy alot of them
     
  2. shizzle8787

    shizzle8787 Member

    Joined:
    Aug 16, 2012
    Messages:
    194
    Likes Received:
    4
    Trophy Points:
    49
    Occupation:
    supervisor
    Location:
    Illinois
    Might get a k&n or something and a pre filter too.
     
  3. 89blaster89

    89blaster89 Member

    Joined:
    Aug 26, 2011
    Messages:
    4,739
    Likes Received:
    25
    Trophy Points:
    80
    Location:
    Pacific northwest, washington
    i recomend a foam filter unless you ride sand alot. either way 270-340 jets, one of them will work
     
  4. shizzle8787

    shizzle8787 Member

    Joined:
    Aug 16, 2012
    Messages:
    194
    Likes Received:
    4
    Trophy Points:
    49
    Occupation:
    supervisor
    Location:
    Illinois
    Thanks man!! That should be a good starting point for me!
     
  5. Herpderplol

    Herpderplol BRRAAAAAAAAAPP

    Joined:
    Aug 22, 2012
    Messages:
    6,290
    Likes Received:
    495
    Trophy Points:
    136
    Gender:
    Male
    Occupation:
    Spending Money
    Location:
    Dickinson, ND
    Well... Being as stock is 270 I believe, it's not too hard. I think I have a 290 and giz has like a 310 or something...
     
  6. 89blaster89

    89blaster89 Member

    Joined:
    Aug 26, 2011
    Messages:
    4,739
    Likes Received:
    25
    Trophy Points:
    80
    Location:
    Pacific northwest, washington
    stock main jet is 230 lol, but yeah i have a 310 in right now but i need to jet it a lil richer i believe and do a chop
     
  7. Herpderplol

    Herpderplol BRRAAAAAAAAAPP

    Joined:
    Aug 22, 2012
    Messages:
    6,290
    Likes Received:
    495
    Trophy Points:
    136
    Gender:
    Male
    Occupation:
    Spending Money
    Location:
    Dickinson, ND
    Oh lol, I thought stock was 27 or 26...

    Me and giz both plan to plug chop this summer for perf jettings....

    A lot of plugs will die that day lol
     
  8. shizzle8787

    shizzle8787 Member

    Joined:
    Aug 16, 2012
    Messages:
    194
    Likes Received:
    4
    Trophy Points:
    49
    Occupation:
    supervisor
    Location:
    Illinois
    Man I wish there was someone close to me, to give me a little first hand help with tuning this thing. I'll learn as I go lol.
     
  9. 89blaster89

    89blaster89 Member

    Joined:
    Aug 26, 2011
    Messages:
    4,739
    Likes Received:
    25
    Trophy Points:
    80
    Location:
    Pacific northwest, washington
    if i didint live in washington i would come over lol! on second thought ill ride the blasty there I:I
     
  10. Herpderplol

    Herpderplol BRRAAAAAAAAAPP

    Joined:
    Aug 22, 2012
    Messages:
    6,290
    Likes Received:
    495
    Trophy Points:
    136
    Gender:
    Male
    Occupation:
    Spending Money
    Location:
    Dickinson, ND
    Where are you located? We might be able to find someone somewhat close, probably in your state, not saying it would work out but ya never know lol I:I
     
  11. shizzle8787

    shizzle8787 Member

    Joined:
    Aug 16, 2012
    Messages:
    194
    Likes Received:
    4
    Trophy Points:
    49
    Occupation:
    supervisor
    Location:
    Illinois
    Re: Re: wht do you think??

    LOL, that would be a hell of a ride!





    Alton, IL
    I'm pretty easy to get along with lol!
     
  12. Herpderplol

    Herpderplol BRRAAAAAAAAAPP

    Joined:
    Aug 22, 2012
    Messages:
    6,290
    Likes Received:
    495
    Trophy Points:
    136
    Gender:
    Male
    Occupation:
    Spending Money
    Location:
    Dickinson, ND

    I meant for people getting to you, or you to them, not if you got along lol
     
  13. shizzle8787

    shizzle8787 Member

    Joined:
    Aug 16, 2012
    Messages:
    194
    Likes Received:
    4
    Trophy Points:
    49
    Occupation:
    supervisor
    Location:
    Illinois
    Re: Re: wht do you think??

    I see lol! It would be nice.
     
  14. jus_me

    jus_me Active Member

    Joined:
    Aug 8, 2012
    Messages:
    3,594
    Likes Received:
    514
    Trophy Points:
    177
    Location:
    N.Y
    If you got any time on your hands just read through the forum you will learn allot.. If you don't,,,, then read AGAIN!!, in time it will come to ya. Trust me if i can get it you can. I'm an epileptic and i forget things ALOT,, but when i read things i tend to remember.. Also this is a great forum as you probably already know, many great people on here to help you out, don't be afraid to ask.
     
  15. Spywell

    Spywell New Member

    Joined:
    Mar 25, 2011
    Messages:
    83
    Likes Received:
    3
    Trophy Points:
    0
    Location:
    Wichita, Kansas
    If you are bogging off the line you likely need a smaller main jet.

    Turn your Air screw out all the way, and needle all the way down, see if that improves.

    Ideally you want to be able to get the bike moving and do top end main jet adjustments with the needle in the middle position.

    In other words at full throttle if the bike bogs you have too much fuel (smaller Main), if the RPM's suddenly race up on you then you need more fuel (Larger main).

    I always start a 2T with High speed tuning, it's a little more difficult but much more accurate throughout the whole range. Also, do not use smokeless oil while tuning, maybe I am just paranoid but I always while tuning visually check to make sure it's running a little rich.

    A quick google search pulled this link, I don't know what's on the page or have even read it but it has a two stroke diagram that shows the adjustments you can make and what range they affect.

    Carburetor Theory and Tuning - Two Stroke MotocrossTwo Stroke Motocross
     
  16. shizzle8787

    shizzle8787 Member

    Joined:
    Aug 16, 2012
    Messages:
    194
    Likes Received:
    4
    Trophy Points:
    49
    Occupation:
    supervisor
    Location:
    Illinois
    Good info guys, yeah I've been doing some reading lol. Thank I'm going to rebuild and jet my carb this weekend.
     
  17. Blaaster

    Blaaster Moderator Staff Member Technician Forum Supporter

    Joined:
    Jul 18, 2011
    Messages:
    15,384
    Likes Received:
    1,113
    Trophy Points:
    165
    Gender:
    Male
    Occupation:
    Pensioner
    Location:
    eastern australia
    Some people talk so much clap trap.

    Set the float level, fit the jets to suit your mods.

    Needle on middle clip, adjust idle and then plug chop.

    If you are bogging, then it is more than likely the motor is starving for fuel.

    Smoke is no indication of the motors state of jetting and cannot be used as a tuning guide.

    I run 25:1, hardly any smoke, and my jetting is just a tad rich.

    ..................................................................................................................................
    Do not stuff with the air screw or needle, do the following, after fitting jets as prescribed.

    Idle adjusting.

    Start with air screw 1.5 turns out.

    Set idle screw so that it has some sort of idle. With TORS it is the big screw under seat on top of unit. With no TORS is is the brass screw midway down carb body.

    Warm up motor and then set idle screw for a faster idle, 2000rpm+

    Adjust air screw either way to get the fastest idle.

    Adjust air screw a little at a time leaving 10 secs or until the motor to responds.

    Re adjust idle screw for desired idle .


    Before you make the plug chop run it is important that the float level is correct, the idle is set correctly and there are no air leaks in the system, otherwise the smoke ring may lie about the AFR.

    WHEN ALL OF THE ABOVE ARE CORRECT PROCEED WITH THE FOLLOWING.

    Warm up motor to operating temp.

    Fit new B8ES plug, ride through the gears and hold WOT in 5th or 6th gear for 10 seconds, or as long as you can safely.

    Switch off the motor and pull in the clutch, apply brakes to come to a stop quickly.

    Take the plug out and replace the old one for the ride home.

    Carefully cut the threaded end off the plug to expose the insulator.

    There should be a smoke ring of a cardboard or biscuit colour around the insulator.

    If it is non existant or a very light colour, you are lean and require a larger main jet.

    If it is a lot darker you are rich and may go down a size in main.

    I prefer to run a little on the darker side, I may loose a little power but it is worth it for the peace of mind that I won't need a rebuild so soon.

    http://www.blasterforum.com/do-yourself-20/how-plug-chop-38674/

    http://www.blasterforum.com/engine-13/plug-chop-how-vid-48226/

    This is a good to go plug.

    [​IMG]


    This one is a little rich, but I would run it, I like to be on the safe side.

    [​IMG]

    You have to get up a reasonable speed so that you can get the motor to pull strongly.

    Then hold it Wide Open Throttle (WOT) for 10 secs or as long as you can.

    The idea is not to get speed but to make it pull strong at full throttle to get onto the main jet curcuit.

    I find I can safely do it on a short run by applying the brakes some.

    If you have not enough room you can use 4th or 5th gear with good results.

    ............................................................................................................
    Could also pay to do a leak test if you have not already done one.





    [​IMG]
     
    Last edited by a moderator: Feb 6, 2014
  18. Blaaster

    Blaaster Moderator Staff Member Technician Forum Supporter

    Joined:
    Jul 18, 2011
    Messages:
    15,384
    Likes Received:
    1,113
    Trophy Points:
    165
    Gender:
    Male
    Occupation:
    Pensioner
    Location:
    eastern australia
    Shizzle please PM me the problems, your mods and type of oil and ratio.
     
  19. shizzle8787

    shizzle8787 Member

    Joined:
    Aug 16, 2012
    Messages:
    194
    Likes Received:
    4
    Trophy Points:
    49
    Occupation:
    supervisor
    Location:
    Illinois
    Re: Re: wht do you think??

    Thanks! I'll shoot ya a pm with my details when I get off work.
     
  20. Spywell

    Spywell New Member

    Joined:
    Mar 25, 2011
    Messages:
    83
    Likes Received:
    3
    Trophy Points:
    0
    Location:
    Wichita, Kansas
    Blaaster did a fine job of detailing everything from A to Z but I would also mention that there are two types of Bog, Rich and Lean.

    Here is a source to help you understand the difference to help us out.

    Besides that, I still stress that after you get your idle working, I would target the main jet (WOT) first, using the information I just provided you, that way you are not chasing your tail like I see so many others do.

    I always mix 32:1 but it's only because I am lazy, it IS actually better to have a richer mixture, Rubbersalt who is a 2T engine build/port/pipe wiz says having a richer mixture actually helps your rings seal up better at higher rpm's thus cancelling out the lesser potential for hp and actually increasing power.

    http://www.off-road.com/dirtbike/tech/two-stroke-gasoil-ratios-20502.html
     

Share This Page