Announcement

Collapse
No announcement yet.

No start after warm up?

Collapse
X
Collapse
 
  • Page of 1
  • Filter
  • Time
  • Show
Clear All
new posts
Previous template Next
  • #1

    No start after warm up?

    Been a while since I posted here. I missed you guys too! *hugs*

    Anyway... :S

    So I synced my carbs with a custom sync tool... THE BEST $7 I HAVE SPENT. Turns out having syncrhonized carbs is a key aspect on 4-cyl bikes... Thing runs like its new out of the box, hardly needs the choke on start up even.

    However, I still have a problem which I first noticed late in the fall. Bike starts fine, no issues with ridability (i.e. no missing, hesitation, loads of power). I can ride it to work (~7 miles, enough to warm it up) and turn it off and restart it with the starter with no problem. However, if I ride it for more than, say, 25 minutes the thing will not restart for anything save bump starting. If I go for a cruise on the highway, backroads, or a long jaunt around town it just won't start. After bump starting, however, the thing backfires through the pipes loudly once and then runs like a champ... by not starting, I mean that the starter turns the motor with no problem (I feel compression out the exhaust) at a good tempo... it just won't hit.

    Any ideas? Anyone else ever have this problem? I plan on doing some voltage test at the battery to make sure the starters not starving the coils of voltage at warm startup.... and I will check for spark next time the problem occurs. For now though I'm fishing for "easy answers"... if those even exist...

    Thanks, its good to hear from you all again.
    Last edited by corey; 02-07-2009, 12:11 PM.
    Corey J. Bennett
    '79 XS1100SF
    Tags: None
  • #2
    Sounds like your starter is pulling just a little too much voltage when its heated up....and not leaving enuf' for the TCI to fire..........

    Maybe you could use a VOM to check battery voltage before you try to start and while starting.......JAT


    Good Luck
    1980 XS11 Special aka The Monster
    "My life used to be a Soap Opera, until I realized something, I own the network."
    My Photo Bucket

    Comment

    • #3
      how olds your battery? My other bike is a honda shadow and I always know when a battery is on its last legs because it does exactally what you describe, after the bike heats up it turns over fine but won't fire, a new battery fixes it every time on my shadow.
      1979 xs1100 Special -
      Stock air box/K&N Filter, MAC 4-2 exhaust, Bad-Boy Air horn, TC fuse box, Windshield, Soft bags, Vetter Fairing, Blinkers->Run/Turn/Brake Lights, Headlight Modulator, hard wire GPS power

      Short Stack - 1981 xs1100 Standard - lowered for SWMBO.

      Originally posted by fredintoon
      Goes like a train, corners like a cow, shifts like a Russian tractor, drinks like a fish, you are gonna love it.
      My Bike:
      [link is broken]

      Comment

      • #4
        First pull the seat, disconnect the battery, and clean all the wiring loom connections and then reconnect with dielectric grease. If that does not solve the problem check your pickup coil wires.

        First bike was an: 1978 XS1100
        Second bike is an FJR1300.
        Now I'm restoring a '79 XS1100.

        Comment

        • #5
          It sounds to me like it might be loading up.Too much fuel maybe.
          He is saying it turns over fine right?Maybe floats too high?
          80 SG XS1100
          14 Victory Cross Country

          Comment

          • #6
            I was going to check for voltage variations when I get some time. Hopefully this will point to a weakened battery or something else simple. The battery is my likely culprit, as its a cheapo that's about 2 years old... and it only measures about 12.1v at total charge. Haven't checked it while running yet. Thanks renegade and pysco!

            I cleaned all the contacts in the electrical system a few years ago, but I'll double check the connections... it never hurts to add more dielectric! What should I look for in the coil wires? I haven't looked at them in a while, since about the same time I cleaned all the connections.
            Thanks Rush!

            Tarzan... how might it be loading up? Would this be evident on the plugs? I pulled them while suffering this ailment and they looked fine.... Also, there are absolutely no engine running problems: idles great, runs strong all the time, plugs are just the right shade of tannish, and it starts fine as long as its not super hot. ... thanks!
            Corey J. Bennett
            '79 XS1100SF

            Comment

            • #7
              corey:

              Even my 3 year old battery registers 13.2 V on full charge. This is 2.2v X 6 cells which is the standard for lead acid batteries. Now this voltage will deterioate to 12.6 over a few days an remain there for about 2-3 months. If you have a cell going bad, then the battery will fall below 12 V and take an inordinate time to recharge to above 12V if at all. If you have 2 cells going bad, then the battery cannot build back up to use to restart while you ride, assuming that you had enough voltage to start in the first place. If the water/eloctrolyte is low (plates uncovered), then the bike might start once but not again as the surface area is not enough to deliver the amps necessary for starting plus the discharge from the first start.

              In short, it sounds that you have a battery going bad. The only way you can test this is to use a battery load tester to determine if the battery discharges at a fast rate.

              Comment

              • #8
                Think I'll take the battery into Auto Zoo and have them load test it, after my preliminary checks of course.

                I'll report back! THANKS!
                Corey J. Bennett
                '79 XS1100SF

                Comment

                Previous template Next
                Working...
                X