2018 crf450r wont turn over
  • Doublenutts
    Posts: 1
    Joined: Fri Mar 29, 2019 9:59 am

    2018 crf450r wont turn over

    by Doublenutts » Fri Mar 29, 2019 10:14 am

    Replaced the battery..Cleaned the grounds..Replaced starter relay..It will do like 1/8 turn when you press the start button and nothing
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    JimDirt
    Posts: 4406
    Joined: Sat Nov 25, 2006 6:31 pm

    Re: 2018 crf450r wont turn over

    by JimDirt » Fri Mar 29, 2019 5:38 pm

    Welcome to the site !! \:D/

    Is it making any distinctive sounds , like a hum while its trying to start ?? , or the solenoid kicking in/out ?? , have you tried jumping the solenoid directly , and bypassing the button ??

    Those would be the first things that come to mind , If you can be a little/lot more detailed in your description of what you are doing , and what the engine and starter itself is doing at the time , and whether you noticed anything the last few times it did start , like dragging , etc. , , I am guessing you have had the bike since new , so details are needed as to how/when this first developed , like did it just work perfect then this , with no warning ?? , have you tried push/bump starting the bike ?? , if so what were the results , not turning over still ?? , started fine ??
    2020 CRF450R
    2006 CRF450X
    Image
    Weiser , Idaho
  • Ricardonz
    Posts: 1
    Joined: Tue Nov 05, 2019 3:19 pm

    Re: 2018 crf450r wont turn over

    by Ricardonz » Tue Nov 05, 2019 3:29 pm

    Hey we had this on a 2019 bike have a look at this part 28121-MKE-A10 Starter reduction gear, our one was slipping causing the same symptom as you describe.
  • Bigd85yota
    Posts: 4
    Joined: Mon Dec 16, 2019 9:48 am

    Re: 2018 crf450r wont turn over

    by Bigd85yota » Mon Dec 16, 2019 10:25 pm

    My 2018 450rx did the same thing to me last weekend. It started up great and I took off up into the mountains. Then I stopped and the starter was a no go. It push started and got me out of there.
    It energizes the starter when I hit the button and sounds like it starts spinning the starter, but only for about a half a second. I have tried by-passing the starter switch but same symptoms. I pulled every wiring harness and checked for moister. All looked good so I put dielectric grease on all connections. Pulled clutch cover to check the judder plate to make sure it didn’t come apart and ripped it out of there while I was in there. I replaced it with a full size clutch plate.
    I will pull the starter off next and look into the reduction gear next. Is this a common issue. Guess I have never heard of it before.
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    JimDirt
    Posts: 4406
    Joined: Sat Nov 25, 2006 6:31 pm

    Re: 2018 crf450r wont turn over

    by JimDirt » Tue Dec 17, 2019 11:18 am

    The issue does not seem to be a "common" problem , but there are posts on other forums about similar starting issues ..... it could be the part that Ricardonz mentioned , or a weak battery , or a grounding issue ..... The thing is , it is going to be hard to diagnose , as it could be multiple things , or a combination of things ...... Personally , I would make the dealer aware of the issue regardless of whether they will stand behind it or not , this way , it is documented , so if further issues arise , you have documentation to back up the complaint , that can either be re-addressed by the dealer , or by Honda itself .... You may also contact Honda itself directly and see if they have a recall or a solution (that they cover) to fix the issue , as if the E-Start is the only means of starting , then it should not be subject to easy and constant failure ......... So they may either look into it , or send you to a dealer to have it warrantied .....
    2020 CRF450R
    2006 CRF450X
    Image
    Weiser , Idaho
  • Bigd85yota
    Posts: 4
    Joined: Mon Dec 16, 2019 9:48 am

    Re: 2018 crf450r wont turn over

    by Bigd85yota » Tue Dec 17, 2019 7:28 pm

    Pulled the clutch basket off and hit the starter button. The starter reduction gear is smoked.... it is spinning the lower gear and the top part of the gear is not spinning at all. Looks like I need to pull the side case to replace it.
    The manual does say not to open the throttle when starting and I did open it slightly to get it to fire up. For some reason when it stalls and the motor isn’t fully warmed up it doesn’t like to start. Probably my own fault.
  • User avatar
    JimDirt
    Posts: 4406
    Joined: Sat Nov 25, 2006 6:31 pm

    Re: 2018 crf450r wont turn over

    by JimDirt » Tue Dec 17, 2019 8:25 pm

    Pulled the clutch basket off and hit the starter button. The starter reduction gear is smoked.... it is spinning the lower gear and the top part of the gear is not spinning at all. Looks like I need to pull the side case to replace it.
    The manual does say not to open the throttle when starting and I did open it slightly to get it to fire up. For some reason when it stalls and the motor isn’t fully warmed up it doesn’t like to start. Probably my own fault.
    Glad you got it figured out ..... As far as the throttle position , you might want to check with leardriver , he is the carb/EFI specialist around here (Private Message him) https://www.crfsonly.com/forum/memberli ... le&u=14707 *Click where it says PM: Send private message* , but I would suspect either TPS position , or the idle is too low (try idle first)....
    2020 CRF450R
    2006 CRF450X
    Image
    Weiser , Idaho
  • Bill.flanagan
    Posts: 1
    Joined: Mon Mar 29, 2021 9:29 am

    Re: 2018 crf450r wont turn over

    by Bill.flanagan » Mon Mar 29, 2021 11:20 am

    Does anyone know where I can find a starter reduction gear fix ? I heard they make one that has a keeper pin instead of just the pressed on

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