Quantcast
Jump to content

  • Do you own an ATV? Join our Forum!

    As a member, you can post in our forums, upload your photos and videos, use and contribute to our downloads, create your own member page, add your ATV events, and even start your own ATV club to host your own club forum and gallery.  Registration is fast and you can even login with social network accounts to sync your profiles and content.

Daniel Gibson

2008 Yamaha Raptor 350 intermittent spark/no spark

Recommended Posts

Have a 08 raptor brought to me a couple months ago. Got it on a trade for house remodel. Bike has around 30 hours. No that's not a typo thirty verifiable hours. The main Yamaha tech has put hands on this bike. Always Been reallyhard to start. If it does it runs really good. That's the kicker...IF! It started out intermittent now it's no spark at all. Everything ignition related is brand new. It all checks out good but still won't do it. Please help

 

Share this post


Link to post
Share on other sites


Did you verify no spark? Or your assuming that’s the problem. My kfx was out of time and acted the same way. What did you do so far to check?



Sent from my iPhone using Tapatalk

Share this post


Link to post
Share on other sites

I've checked and rechecked for spark by a spark tester and by removing plug and grounding it out to the motor and frame etc... I've adjusted valves,re-timed it,replace all ignition related parts. They were under warranty and at request of customer. Those make the 4th time they've been replaced. Cdi,stator,regulator/rectifier,coils,wiring harness,relays,hell i even changed out the damn light bulbs. You never know lol. Yamahas head tech flew here and couldn't get it right either after 4 days of turning wrenches. 

 

Share this post


Link to post
Share on other sites


Hmm. You did everything you could. Even most of what I would have. It seems like reversed wires. I know Yamaha has the same plugs with same connectors almost the same wires too. Try that. Even new quads and be assembled wrong. Confirm your wiring.



Sent from my iPhone using Tapatalk

Hmm. You did everything you could. Even most of what I would have. It seems like reversed wires. I know Yamaha has the same plugs with same connectors almost the same wires too. Try that. Even new quads and be assembled wrong. Confirm your wiring. Even a pinched wire would do that.



Sent from my iPhone using Tapatalk




Sent from my iPhone using Tapatalk

Share this post


Link to post
Share on other sites

Did you change the pick ups on the stator mount? Something isn’t adding up.


Sent from my iPhone using Tapatalk

Share this post


Link to post
Share on other sites


Just an update on this @$*%!%# bike. Jiggled the wire harness going to the stator and trigger coil and got it starting and running beautifully. Started over 50 times for over a week straight. The customer came to pick it up. He was 10 foot away watching as it happened. Ran for about 30 minutes continuously perfect. Went to push it backwards to turn around aaannndddd guess what?!? Yep the hunk of junk dies and back to the same B.S.! WTF IS THIS BIKES DEAL?

forgot to say i found a terminal end was crimped on to the trigger coil wire but they did not strip the insulation off before they crimped it! 

Share this post


Link to post
Share on other sites

Have you checked for spark now that its not running? 
 

I would check/inspect the stator wires going directly into the engine. I've seen instances where wires at the entry point on the engine  lose there insulation and short out against the engine housing.  
Wiggle the wires as you crank the engine and see what happens.  

In addition to that the fact that you wiggled wires and it ran great tells me there's a short exposed someplace. 

Could be wires rubbing against the frame sie to rubbing, OR ... maybe a wet cdi that has dried out and got wet again.   
 

Take the cdi off of the bike and put it in the oven on 200 deg for 10 minutes and put it back on and try that.  
Sounds crazy but it works.  

Share this post


Link to post
Share on other sites


Posted (edited)

New OEM harness is $150 on Partzilla.  That's probably a lot cheaper than hours spent tracking down an internally broken wire or sheared insulation causing a ground short.  On ATV flips I nearly always undervalue my hourly rate and assume that as long as selling price is higher than what it took to get it ready to sell then I'm good and making a buck.  But I rarely figure in cost per hour for my time.

Assuming that Frank's suggestions above don't resolve the issue anyway....

Edited by MarkinAR

Share this post


Link to post
Share on other sites

Boy, this is a tough one! Reminds me of a snowmobile I worked on once. The small wire that fed the external ignition coil was breaking up inside, while the insulation looked perfect. Intermittent issues are the worst!! Hope you get it figured soon.

  • Like 1

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


  • Similar Topics

    • By Ajmboy
      Disconnected the plow yesterday on my 2004 Yamaha Grizzly 660 and am getting ready to do some riding yesterday and the battery went weak, Starter cranked a few times but week. Put my trickle charger on that I bought and went to the garage today to start it up, but the starter is just spinning and not engaging. The solenoid is clicking. The pull start sucks and is hard to pull (never use it and need to look into that). Quick video of the starter spinning. Could it be the starter or  the starter clutch one-way bearing? I guess I need to take the cover off to see what's going on.

      2004 Yamaha Grizzly 660 Starter Spinning.mp4
    • By Kayla Frieswick
      2001 Yamaha Wolverine new coil new solenoid switch new battery no spark
    • By Steven Urban
      First time using this forum.  Owned a Kawasaki dirt bike once, had no issues.  But I picked up this 4 wheeler at an auction.  They stated it ran, but only needed a battery.  Well I do not believe that was all true.

      Some pictures are attached.  Not sure why, but the whole air filter stuff was removed.  They had some small thing inserted as a make shift air filter.

      I purchased a battery to try this all out.  Waiting to return it and get the proper size, as it was too big for the battery box.  But here is my issue I had while the battery was connected.

      1 - The lights on the steering column did not come on.  Not sure if they work or not.

      2 - The starter solenoid seems to be bad.  I have a new one on order. 

      3 - In the pick, there is another rusted part.  Not sure what that part is or what it is used for.

      4 - What is the 12v rectifier?  square bodied part.

      So when I hooked the battery up.  Pushing the start button did nothing.  Pulling the cord to try and pull start, it turned, but would never fire.  I have put in a new spark plug as well, it looked worn out.  With electric start, I crossed over the posts on the start solenoid, it turned over, but would never fire and start.

      I have read a few other threads and it stated something about needed the neutral light on.  SOmething about a kill switch.

      Any help would be appreciated.



    • By Brewster
      Being confined to the farm with the corona virus pandemic, I have started working on long abandoned projects.  I have a 95 Yamaha Moto 4 350 and the CDI box went bad (I think).  Finally broke down and spent the money for a new one.  It had the same part number as the old one, but the old box as 2 extra wires on the pig tail and not all the wire colors with the new box match the old box, so I'm not sure how to hook it up.  Have searched the internet on and off for some time but can't seem to find anyone who can help.  Does anyone out there know enough that they would try to help me?
  • Recently Browsing   0 members

    No registered users viewing this page.


×
×
  • Create New...