Announcement

Collapse
No announcement yet.

Slow cranking on startup

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • Slow cranking on startup

    My bike cranks over really slow.
    charged battery and was at 13.4 and after 12 hours was still at 13.3 volts. Cleaned connections on battery and checked to see if decompression spoon working and was ok.
    it still starts ok and previous owner said it had already had a new starter motor( and bare in mind it’s only done 8,500 miles )
    I did think about getting an Odessy battery as I had one on my Guzzi and it completely changed the startups.
    Going to check the starter relay first and work my way along.
    I’ve read so many posts on this subject my head is buzzing

    Dave

  • #2
    Is the starter a factory OEM Yamaha piece? Remove starter and cap...dump out black brush material, clean it out good, polish commutator. Install 4 gauge power/ground wire from Dave Jenkins. Make sure battery connections are tight.

    what voltage does battery drop to WHILE cranking? Does it dip below 10 volts? If so battery is bad. Resting voltage doesn't tell much.
    LET'S RIDE

    Comment


    • Bikerron
      Bikerron commented
      Editing a comment
      And, put a dab of grease in the end cap bearing cup.

  • #3
    Check the metal tab inside the starter that connects the brushes is not broken at the 90 degree bends.

    Comment


    • #4
      Is that replacement starter an OEM or aftermarket. Several complaints have been lodged within these pages of substandard aftermarket starters.

      Comment


      • #5
        I have 4ga cables made and ready to ship for $45 shipped in the U.S.
        It's not the starter relay. The relay either works or it don't it won't make it crank slow. Check the battery voltage as you are cranking it, it should stay above 9.5v-10v. Anything below that and the battery is bad. you can bring it to the auto part store and have them load test it also.

        Comment


        • #6
          Viscosity of oil will make a big difference. I had that issue with 20-50 oil and changed to 10 - 40 because I live in the Pacific Northwest where it's not real hot.

          Comment


          • #7
            Thanks for the replies guys, oil wise it is 10/40 and soon to be replaced. Starter motor wise , I’m not sure but was done by a dealer so hopefully oem. Not had a chance to remove it yet as I have too many jobs to catch up on before I mess with it ( or so the wife says lol ) I’ll try the drop test on the battery as it’s an easy quick check

            Comment


            • #8
              Right then, start motor out and back plate off. One stuck brush later and a quick clean. Started a lot better . Commutator only had one segment that showed signs of arcing and no more than 10% of that one segment so hopefully should be ok

              Comment


              • #9
                why was the brush stuck? are they worn out?

                Comment


                • #10
                  Think it’s down to standing for a long time, bikes a 2002 and it only had 8,500 miles on it when I brought it plus in was used as a winter bike in the UK which means loads of salt damage. When the isolation ends and we can ride I,ll give it a couple of hundred miles and check it.

                  Comment

                  Latest Posts

                  Collapse

                  Topics Statistics Last Post
                  Started by Lug Nut, 1 week ago
                  16 responses
                  228 views
                  4 likes
                  Last Post Lug Nut
                  by Lug Nut
                   
                  Started by roadiemort, 4 weeks ago
                  144 responses
                  747 views
                  1 like
                  Last Post LDofDC
                  by LDofDC
                   
                  Started by mariner3302, 1 hour ago
                  1 response
                  6 views
                  0 likes
                  Last Post DEEPHATE  
                  Started by psychoal, 11-05-2019, 07:28 AM
                  9 responses
                  174 views
                  0 likes
                  Last Post psychoal  
                  Started by Shores, 02-21-2018, 08:16 PM
                  42 responses
                  29,946 views
                  15 likes
                  Last Post chromax
                  by chromax
                   
                  Started by AR. Hillbilly, 02-01-2020, 10:31 AM
                  76 responses
                  977 views
                  2 likes
                  Last Post AR. Hillbilly  
                  Started by Pauli466, 2 days ago
                  10 responses
                  128 views
                  0 likes
                  Last Post Pauli466  
                  Started by MrG, 2 days ago
                  27 responses
                  138 views
                  0 likes
                  Last Post Rick Fortner  
                  Started by WarPig, 1 day ago
                  8 responses
                  79 views
                  0 likes
                  Last Post GreenMachine  
                  Started by Oldsguy1, 3 days ago
                  14 responses
                  160 views
                  0 likes
                  Last Post Oldsguy1  
                  Started by Blackcloud12, 07-27-2020, 10:42 PM
                  47 responses
                  593 views
                  2 likes
                  Last Post Blackcloud12  
                  Started by Lug Nut, 23 hours ago
                  0 responses
                  29 views
                  0 likes
                  Last Post Lug Nut
                  by Lug Nut
                   
                  Started by Doc_V, 2 days ago
                  10 responses
                  192 views
                  5 likes
                  Last Post Doc_V
                  by Doc_V
                   
                  Started by Lug Nut, 2 days ago
                  19 responses
                  385 views
                  0 likes
                  Last Post Lug Nut
                  by Lug Nut
                   
                  Started by Roadtalker, 1 day ago
                  6 responses
                  68 views
                  0 likes
                  Last Post Pauli466  
                  Started by Horsehammerr, 3 days ago
                  25 responses
                  190 views
                  0 likes
                  Last Post Paladin
                  by Paladin
                   
                  Started by Pauli466, 1 day ago
                  7 responses
                  62 views
                  0 likes
                  Last Post Lug Nut
                  by Lug Nut
                   
                  Started by Tsilk87, 1 day ago
                  4 responses
                  54 views
                  0 likes
                  Last Post MrG
                  by MrG
                   
                  Started by McVinny614, 2 days ago
                  5 responses
                  102 views
                  0 likes
                  Last Post roadiemort  
                  Started by Shores, 4 days ago
                  29 responses
                  233 views
                  0 likes
                  Last Post Shores
                  by Shores
                   
                  Working...
                  X