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Thread: rd250lc rebuild

  1. #1
    Join Date
    24th September 2007 - 11:59
    Bike
    1982 rd250lc
    Location
    hobart tasmania
    Posts
    2

    rd250lc rebuild

    Hi, have recently rebuilt my rd250lc for the track, it starts beautifully but once the choke is pushed in it only runs on one cylinder (the cyclinder without the choke carbie!) turn the choke back on and magically that cylinder fires right back up. Any advice?

  2. #2
    Join Date
    30th March 2004 - 11:00
    Bike
    2001 RC46
    Location
    Norfshaw
    Posts
    10,455
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    Sounds like it's running toldlessly lean - check for air leaks, blockages in the carb, and fur balls.
    ... and that's what I think.

    Or summat.


    Or maybe not...

    Dunno really....


  3. #3
    Join Date
    24th September 2007 - 11:59
    Bike
    1982 rd250lc
    Location
    hobart tasmania
    Posts
    2

    running sort of

    I have checked all settings, now runs ok at 1/2 to 3/4 to main jet, once I allow revs to come back to idle that cylinder stops burning fuel. Again I start the bike with choke on allow to warm and it will rev right through the range through to 9k, oncle I allow revs to drop, after about 30secs the choke side cylinder start to not fire effectively.

  4. #4
    Join Date
    17th December 2003 - 20:00
    Bike
    SV1000, RG500, RD350
    Location
    Auckland
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    1,100
    Quote Originally Posted by rd250lcman View Post
    I have checked all settings, now runs ok at 1/2 to 3/4 to main jet, once I allow revs to come back to idle that cylinder stops burning fuel. Again I start the bike with choke on allow to warm and it will rev right through the range through to 9k, oncle I allow revs to drop, after about 30secs the choke side cylinder start to not fire effectively.
    Blocked pilot jet and/or float height.
    (\_/)
    (O.o)
    (> <) Peace through superior firepower...
    Build your own dyno - PM me for the link of if you want to use it (bring beer)

  5. #5
    Join Date
    10th September 2006 - 14:44
    Bike
    1972 suzuki ts185
    Location
    TE Toro
    Posts
    65
    It will be very lean if it will rev out with the 'choke' on. Whatever is wrong should be pretty obvious, but check the outside before ripping into the carbs themselves. Check the carb balance tube - I think there may be a tube between the two carbs - not sure. Make sure that the hose connecting the vacuum tap is connected. Are you still running it on Autolube? If not you will need to have the oil feed holes into the intake blanked off. Have you done any mods to try and make it go faster????

    If you find no air leaks and the carbs are ok there is a possibility that the crank seals are worn or something like the base gasket is damaged. More likely to be carburettor related though.

    Dont ride it around like that or you may well melt a piston - just ride it long enough to see if you've fixed it.

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