Wont start when cold

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  • skids
    XS-XJ Super Guru
    • Jul 2002
    • 5048
    • Florissant, CO, USA

    #16
    PS. The enrichener may be plugged in the float bowl bottoms (common problem).
    Skids (Sid Hansen)

    Down to one 1978 E. Stock air box with K&N filter, 81H pipes and carbs, 8500 feet elevation.

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    • CatatonicBug
      Master of XSology
      • Oct 2008
      • 6117
      • Clinton, UT

      #17
      Have you changed the oil to a winter visocity? 20W50 is way too thick for temps that cold. It will lug the engine down and make it hard to start.
      1980 XS850SG - Sold
      1981 XS1100LH Midnight Special (Sold) - purchased 9/29/08
      Fully Vetterized and Dynojet Kit added, Heated Grips, Truck-Lite LED headlight, Accel Coils, Irridium plugs, TKAT Fork Brace, XS850LH Final Drive & Black SS Brake lines from Chacal.
      Here's my web page devoted to my bike! XS/XJ User's Manuals there, and the XJ1100 Service Manual and both XS1100 Service manuals (free download!).

      Whether you think you can, or you think you cannot - You're right.
      -H. Ford

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      • Tat2demon
        XSive Maximus
        • Jun 2012
        • 718
        • Sioux Falls, South Dakota

        #18
        Originally posted by DGXSER
        Does it use enrichment circuit to start in warmer weather? I use full choke to start year round.
        I use it after it starts just to keep the RPMs up a little until the motor warms up.

        Originally posted by skids
        Check to see if the airbox has gasoline in it. It will seem flooded if the petcock or octopus and fuel valves in the carbs are leaking.
        None in the box.

        Originally posted by skids
        PS. The enrichener may be plugged in the float bowl bottoms (common problem).
        Will check that out if I cant figure out anything else without taking the carbs apart again.

        Originally posted by CatatonicBug
        Have you changed the oil to a winter visocity? 20W50 is way too thick for temps that cold. It will lug the engine down and make it hard to start.
        No I havent. Never thought about it. What do you suggest?
        Nate

        78 XS11 "Matilda" 2H7 000364

        2001 Raptor ACCT, T.C. Fuse Box, TC Bros Forward Controls
        Kuryakyn Iso Grips/Throttleboss/Bar End Mirror, Custom Covered Seat
        Shinko 712s, HID Headlight, RC Performance Exhaust
        Bikemaster Daytona Handlebars, Galfer SS Brake Lines
        Barnett HD Clutch Springs, T.C. Spin On Filter Adapter
        K+N Air Filter

        88 Voyager XII
        81 XJ650 Maxim

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        • CaptonZap
          XS-XJ Guru
          • Jun 2010
          • 1748
          • Denver

          #19
          Your best bet would be to get, or download, a manual, which gives you all the information that you are seeking.



          CZ

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          • crazy steve
            XS-XJ Guru MODERATOR
            • Jan 2009
            • 7932
            • Beautiful outer Yelm, WA

            #20
            Originally posted by CatatonicBug
            Have you changed the oil to a winter visocity? 20W50 is way too thick for temps that cold. It will lug the engine down and make it hard to start.
            'Bug is right; when temps get to 40 or less, Yamaha recommends switching to a 10W-40 oil. The only caveat to this is if you have a big temp swing during the day; they don't recommend this weight if temps are above 60F.

            You might also try putting a cover over the bike and putting a light under it to help keep the bike warm...
            Fast, Cheap, Reliable... Pick any two

            '78E original owner - resto project
            '78E ???? owner - Modder project FJ forks, 4-piston calipers F/R, 160/80-16 rear tire
            '82 XJ rebuild project
            '80SG restified, red SOLD
            '79F parts...
            '81H more parts...

            Other current bikes:
            '93 XL1200 Anniversary Sportster 85RWHP
            '86 XL883/1200 Chopper
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            Yep, can't leave nuthin' alone...

            Comment

            • DGXSER
              Doctor of XSology(Deceased)
              • Nov 2008
              • 12001
              • Cincinnati, Ohio

              #21
              I have not yet switched oil from 20W50 to 10W40 on mine over the winter. Now I do not ride every day or often at all below 50 deg outside. But I have started and ridden in 30-40 deg weather without the engine fighting me at all on start-up. But then, mine is in an enclosed but unheated garage.
              Life is what happens while your planning everything else!

              When your work speaks for itself, don't interrupt.

              81 XS1100 Special - Humpty Dumpty
              80 XS1100 Special - Project Resurrection


              Previously owned
              93 GSX600F
              80 XS1100 Special - Ruby
              81 XS1100 Special
              81 CB750 C
              80 CB750 C
              78 XS750

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              • natemoen
                Master of XSology
                • May 2010
                • 8640
                • Fargo

                #22
                Originally posted by DGXSER
                I have not yet switched oil from 20W50 to 10W40 on mine over the winter. Now I do not ride every day or often at all below 50 deg outside. But I have started and ridden in 30-40 deg weather without the engine fighting me at all on start-up. But then, mine is in an enclosed but unheated garage.
                I have not switched oils yet this year and when I start it up in the morning from the garage when it has been in the 20's-30's it starts just fine, but when I start it after work and it has been outside all day and it Is In the 30's-40's then it is a little more difficult!
                Nathan
                KD9ARL

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                1978 XS1100E
                K&N Filter
                #45 pilot Jet, #137.5 Main Jet
                OEM Exhaust
                ATK Fork Brace
                LED Dash lights
                Ammeter, Oil Pressure, Oil Temp, and Volt Meters

                Green Monster Coils
                SS Brake Lines
                Vision 550 Auto Tensioner

                In any moment of decision the best thing you can do is the right thing, the next best thing is the wrong thing, and the worst thing you can do is nothing.

                Theodore Roosevelt

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                • Tat2demon
                  XSive Maximus
                  • Jun 2012
                  • 718
                  • Sioux Falls, South Dakota

                  #23
                  Just changed out the oil. Will see how it is tomorrow. Today it was 50 when I went to work and it started just fine. It was 42 by the time I got off and wouldnt start. I waited a few hours for it to hit 48 and it fired right off.
                  Nate

                  78 XS11 "Matilda" 2H7 000364

                  2001 Raptor ACCT, T.C. Fuse Box, TC Bros Forward Controls
                  Kuryakyn Iso Grips/Throttleboss/Bar End Mirror, Custom Covered Seat
                  Shinko 712s, HID Headlight, RC Performance Exhaust
                  Bikemaster Daytona Handlebars, Galfer SS Brake Lines
                  Barnett HD Clutch Springs, T.C. Spin On Filter Adapter
                  K+N Air Filter

                  88 Voyager XII
                  81 XJ650 Maxim

                  Comment

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