R65 really spotty starting

Discussion in 'Airheads' started by wiznas, Oct 19, 2012.

  1. wiznas

    wiznas Adventurer

    Joined:
    Oct 9, 2012
    Oddometer:
    18
    Location:
    Virginia
    Bought this R65 last week. Some days it starts up within one or two cranks, some days it starts after very lengthy crank sessions, somedays I can't start it all. It has started on the first crank as cold as 60 degrees. For the first 30 minutes or so of a ride (even on a good day) the bike will not stably idle and I need to keep a touch of gas on at all times. Pretty heavy vibrations as well. Today (balmy 74 degrees F) the bike started after an agonizing 15 minutes of cranking, I revved it in neutral for 5 minutes and slowly let it into 1st gear, where it stalled, died and refused to restart.

    From what I've read a carb rebuild kit is the first item on the to do list. Should I mess with the timing first? Or do anything before a carb rebuild? I'm not mechanically inclined but would like to become so (one of the reasons I bought the bike) Is there a really good thread for noobies rebuilding these carburetors? PO has yet to send me the Haynes as promised, so I was hoping to find a good how-to here.
    #1
  2. R100RT Mark

    R100RT Mark Been here awhile

    Joined:
    Feb 19, 2011
    Oddometer:
    315
    Location:
    Georgia, USA
    Checking and adjusting ignition timing and valve clearances come before carbs. Easy and quick jobs. My guess is that you will need at least a basic carb cleaning if not a more thorough overhaul, but you might get lucky by dropping the float bowls and cleaning out any debris paying particular attention to the fuel enricher pick up that is hidden in one corner. You should be able to find a bunch of online sources to guide you through a carb clean/rebuild. Nothing really difficult if you pay attenion to the details.
    #2
  3. bikerfish

    bikerfish flyfishandride

    Joined:
    Aug 18, 2010
    Oddometer:
    2,619
    Location:
    western pa
    I'll second the timing check and valve adjustment. do those things first, then see how it runs. from what you describe, it sounds like the valves are a bit tight. best to do the FREE things first, then spend money later if it needs it!
    #3
  4. jdiaz

    jdiaz .

    Joined:
    Feb 27, 2002
    Oddometer:
    32,409
    Location:
    Flyover State
    When the cylinder heads are cold, you have to crack the throttle slightly when starting. I hope you are doing that.

    Don't rebuild the carbs until you blow the junk out of the cold-start jet in each float bowl. I'm betting they are plugged (because someone left fuel in them) and leaning out your mixture.

    ps-Wear safety glasses when you squirt carb cleaner down that hole. :lol3
    #4
  5. Horsehockey

    Horsehockey A GPS? Huh?

    Joined:
    Nov 17, 2010
    Oddometer:
    383
    Location:
    Vermont
    Best deal for a noobie airhead owner who wants to become proficient mechanically is a tech session. Consider joining the Airheads Beemer Club (google it) for starters....the monthly newsletter contains notices of tech sessions. Meanwhile, there should be a friendly Virginia airhead out there willing to show you the ropes. If it were me, I'd start with a valve adjustment.
    #5
  6. Uncle Pollo

    Uncle Pollo Bad Hombre

    Joined:
    Jun 1, 2006
    Oddometer:
    53,127
    Location:
    Albuquerque, Neue Messico
    Don't look into the carb hole while spraying, do it outside, and hold the carb sideways.

    It BURNS!!!!
    #6
  7. wiznas

    wiznas Adventurer

    Joined:
    Oct 9, 2012
    Oddometer:
    18
    Location:
    Virginia
    Roger on valves, I'll get to them first. I also love the idea of a tech day with the Airheads Beemer Club I hope they do one in Virginia at some point. Don't look through the jets as I blast carb cleaner through, check.
    #7