Quantcast
Jump to content

  • Join Today, It's Simple and FREE!

    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.

Tahj

Grizzly 660 check timing

Recommended Posts

I bought a "project" Grizzly 660, I think it has been a few people's project. The PO had it for a while and did not have time to work on it. He said the battery was good, but I don't know how he knew because the display was blank, no lights and won't crank or run. 
I found a nest under the front cover, by the CVT inlet, a chewed thru wire and a few more without insulation. Rewired those from the connector (black 3 wire to the display) and replaced the fuse as suggested by a search from this site. That got the display working and power to other circuits. 
I replaced the aftermarket start switch with a used OEM switch from eBay. Then it would crank a little, and started once for a few seconds. 
I'm a small engine mechanic - mowers, snow blowers, etc. In my small engine work I have had a number of rider mowers that would crank about a half turn and then stop. The owners have suspected a bad battery and changed it with no improvement. Setting the valves to spec usually fixed this.


I set the valves on the Grizzly without solving the crank problem. I wonder if the timing chain could be off - slipped a tooth. 

I don't know any way to check for this without pulling the head and looking at the timing marks on the cam gear. 

Is there another way to check for proper timing?

 

Share this post


Link to post
Share on other sites


Hey Tahj you can take a look atv the timing mark on the fly wheel and pull the plug to see where the piston is in relation to the TDC mark but other then that I think your stuck pulling cam sprocket cover in order to see and make sure everything lines up.  You don’t want to spin the engine and have the valves and piston hitting each other so be careful with the cranking too much. 

Share this post


Link to post
Share on other sites

Thanks Frank

Some engines have cam cover plates, but I think I have to pull the valve cover on this beast. Do you know if that would get into the water jacket? I['d like to avoid that.

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 technofarmer
      Hi there i was needing to ask a question. I may soon be getting a UTV of one sort or another and not sure what is good or better to avoid?  So far i hear great things about the Arctic Cat Prowler and Havoc, and many speak well of the Kawasaki Mule all but the 610?  
       
       So what are your thoughts and especially experiences?  What have you had and used in farm life and trail riding that has held up well or hasn't?        
    • By Mike Johnson
      Does anyone know what the 3rd item is behind the battery on this ATV ? I know 1 is the,  solenoid1 is the CDI box, what is the 3rd.
    • By Scott Sirr
      I need to figure out how to clean/fix or replace my neutral switch assembly On my 2008 Yamaha big bear 400 as generally the neutral light doesn’t come on when it is in neutral. To get it to come on I have to wiggle the foot shifter and hold it in just the right spot.
      I have googled it and can’t find much on the 400’s. I can’t find a service manual online and the parts manual is super vague.
      I think it is in the right side engine cover area, but not certain. 
       Any help would be great. thanks
      Scott
    • By Ajmboy
      Unfortunately I didn't notice some of the rust hitting the undercarriage of my 2004 Yamaha Grizzly 660, but saw it the other day when I was doing some maintenance, oil change, air filter, spark plug, etc. The left side footrest broke and that's causing the plastic to hit the front wheel. It broke right at the welds from too much rust. Looks to me like what I need is (looked this up on yamahapartshouse.com):
      YAMAHA FOOTREST BOARD 5KM-27481-10 Left side (broken)
      YAMAHA FOOTREST BOARD 5KM-27488-10-00 Right side (rusted and will probably break eventually)

       
      Does anyone have a less expensive source? I did see on ebay a couple of listings but it still comes out to @ $50 each, 
  • Recently Browsing   0 members

    No registered users viewing this page.


×
×
  • Create New...