Keihin 41mm issues.

Discussion in 'EFI/carb' started by NorCal2500HD, Aug 19, 2009.

  1. NorCal2500HD Husqvarna
    B Class

    Location:
    Fremont,Ca
    I have a 07 SMR510. About 6 weeks ago I got a container of VP U4..filled the tank up rode a few miles and put the bike away....A week later I go to start it up and its leaking fuel out of the vent hoses...Come to find out this stuff is notorious for gumming up...So I drain out all the fuel and the bike has sat up until yesterday....Take the carb off give it a good cleaning with carb cleaner. Removed the fuel screw ( forgot to count how many turns it was out, lose the spring, oring and washer). Talk about a good time...

    Today I find everything and put it back together...
    Bike seems to be having a small issue with firing up...takes a good 3-5 seconds.
    Once the bike fires up and I blip the throttle the rpms come down to idle level pretty fast.....when i go to blip the throttle again it goes pop and dies....

    So, Ive looked around for adjusting the carb and I cant seem to find anything....

    Can anyone give me any tips to get this thing figured out.
    How are the adjusting nuts supposed to be on the carb and up by the throttle? How much slack needs to be in the cable if any...

    Coffee is local and helped me out with the jetting so its pretty much dead on where it needs to be. Its just the other little stuff I need help with.
    Thanks
    Brian
  2. NorCal2500HD Husqvarna
    B Class

    Location:
    Fremont,Ca
    Fixed it.....Air compressors are your friend. Took everything back apart and blew the carb out. A piece of the orig fuel screw oring came off and lodged itself in the circuit...fired right up after.....Rookie mistake.
  3. Coffee CH Owner

    Location:
    Between homes - in ft Wayne IN
    Husqvarna Motorcycle:
    2006 TE250, 2013 TR650 Terra - sold
    That's great news :thumbsup:

    I wondered what your issue may have been.
  4. NorCal2500HD Husqvarna
    B Class

    Location:
    Fremont,Ca
    So now I just need to get the AP all figured out, or at least fine tune everything. Theres a slight bog as soon as I twist the throttle. Bikes died 2 times on me riding, both times coming to a stop with the clutch in. with the hot start out, didnt want to fire up right away.....
    Thanks
  5. Coffee CH Owner

    Location:
    Between homes - in ft Wayne IN
    Husqvarna Motorcycle:
    2006 TE250, 2013 TR650 Terra - sold
    Regarding the stalling it sounds like you are rich on your pilot circuit. Adjust the fuel screw for max rpms at idle. Keep turning the idle speed down as you adjust the fuel screw and watch the rpms on the speedometer... that should make the AP behave better too.

    Unless you have changed something you should have the correct jets in the bike.
  6. NorCal2500HD Husqvarna
    B Class

    Location:
    Fremont,Ca
    Thanks Ill chek that out......
  7. restukey Husqvarna
    A Class

    Location:
    Bethesda, Md
  8. rabskyline Husqvarna
    AA Class

    Location:
    Sunshine Coast,Queenslander !!
    Husqvarna Motorcycle:
    2014 te250r
    Other Motorcycles:
    Yer maw !
    mine cough stalls if i forget to put hot start back in after firing up when ive stalled/dropped it in the forest etc.