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  1. #1
    Newbie
    My Bike(s)
    1994 Suzuki RM250
    Location
    Indy
    Posts
    22

    1994 RM250 tuning...

    Well, I got the RM250 running and it starts up really nice. But, it idles rough and spews alot of blue smoke while idling and accelerating. Any suggestions before i dig in?

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  3. #2
    Seat Tester
    My Bike(s)
    Soon to come...
    Location
    Arlington, Tx
    Posts
    65
    Well its a 2 stroke correct? If so then its suppose to blow smoke, not alot though. 2 Strokes burn oil thats why they smoke. But im sure someone on here could offer a little more help than me.

  4. #3
    Newbie
    My Bike(s)
    1984 RM250
    Location
    Alberta Canada
    Posts
    11
    My bike blew hella lots of smoke when whoever owned it first ran it too rich and plugged up the muffler. Maybe you're mixing it too rich?

  5. #4
    Found second gear by accident
    My Bike(s)
    06 Buell Ulysses
    Location
    DFW, Texas
    Posts
    302
    IF i remember correctly (check with someone else too) blue smoke means youre running too lean which is very bad for 2 strokes. What ratio are you using? Try 32:1

  6. #5
    Newbie
    My Bike(s)
    1994 Suzuki RM250
    Location
    Indy
    Posts
    22

    Maybe it's timing...

    Well, I'm running a 32:1 ratio and my neighbor whom is helping me told me the exaust looked perfect, but the timing was waaay off. It runs with a lot of rythmn to it, mainly while idling. Anyone got any suggestions?

  7. #6
    Found second gear by accident
    My Bike(s)
    06 Buell Ulysses
    Location
    DFW, Texas
    Posts
    302
    If you think the timing is off, take of the cover for the magnito and make sure the timing bolt is tight and make sure lines to match up

  8. #7
    Newbie
    My Bike(s)
    1994 Suzuki RM250
    Location
    Indy
    Posts
    22
    The lines match up and all the bolts are tight, but it still runs really rough when i accelerate slowly and idle

  9. #8
    Newbie
    My Bike(s)
    1994 Suzuki RM250
    Location
    Indy
    Posts
    22
    I've messed with my timing and that doesn't seem to be the problem anymore. But, whenever i rev full throttle, the bike bogs out in the top rpm range and dies afterward. It still starts right up after the fact though. PLEASE HELP!! I'M SO CONFUSED!

  10. #9
    Newbie
    My Bike(s)
    1984 RM250
    Location
    Alberta Canada
    Posts
    11
    Try checking the needle jet to make sure it's both secured by the retaining clip and on the right notch?

  11. #10
    Sprocket Pilot
    My Bike(s)
    Which one of the 9?
    Location
    USA
    Posts
    878
    2 things need looking at.

    1) Check the float height and correct it to factory specs.
    2) Check the reeds that they are in good condition and are sitting flush on the reed block.

    There are some other things but check those first.

  12. #11
    Newbie
    My Bike(s)
    1994 Suzuki RM250
    Location
    Indy
    Posts
    22
    I've got my jetting and float height right, and I already put brand new reeds in. Any other ideas?

  13. #12
    Sprocket Pilot
    My Bike(s)
    Which one of the 9?
    Location
    USA
    Posts
    878
    1) Head Gasket leaking coolant.
    2) Bad crank seal (drawing gearbox oil into the intake charge
    3)Bad needle valve (worn out)

  14. #13
    Newbie
    My Bike(s)
    1994 Suzuki RM250
    Location
    Indy
    Posts
    22
    If the power valves (exhaust valves) aren't opening properly, could this cause my problem?
    Last edited by JohnnyBoy425; 05-20-2006 at 02:07 PM.

  15. #14
    Newbie
    My Bike(s)
    1994 Suzuki RM250
    Location
    Indy
    Posts
    22
    does anyone know if the fact that my exhaust valves might be acting up would have anything to do with my bike running the way it does?

  16. #15
    Sprocket Pilot
    My Bike(s)
    Which one of the 9?
    Location
    USA
    Posts
    878
    You need to service them before each season per the manual. If you have a load of carbon built up on them they will not function as they are intended. So yes take them out decarbon them and refit them


 

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