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.

    • Sign In
    • or
    • Sign Up
    • or
Tahj

Grizzly 660 check timing

By Tahj, in General Talk - Anything Goes!

Recommended Posts

Tahj    8

Tahj
Posted

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

Frank Angerano    835

Frank Angerano
Posted

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

Tahj    8

Tahj
Posted

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.

×
Go To Topic Listing

  • Similar Topics

    • redneck999
      atv to car battery
      By redneck999
      i am sure some one has switched from the dinky battery to a larger car car battery, so any advice? ive got enough bits and bobs on my atv that i feel i need to step up, i keep a float charger on it but i left it unplugged for about a week and it was dead and it a fairly new battery from advance auto, im probably gonna add a cb radio in the future and i think the only thin that has a constant draw is the clock in the dash and the memory for the stereo
      2012 cf moto x5 500 lwb
    • BuckBilly
      The Official Good morning thread!
      By BuckBilly
      Good morning to all !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
      Let's see if we can make this a daily event.
    • JacobSlabach
      How 4-cycle ATV Engines Work Discussion
      By JacobSlabach
      in this thread, I want to discuss how 4-cycle atv engines work- what the different types are...  how they are set up and which you prefer.  To start off, are the cams on ALL atv 4-strokes powered by a cam chain?  I know that on say a lawn mower or logsplitter engine, the cam is turned by the tappet, pushrods, and valve rockers.  Which is better and why?  Chain-driven cams or pushrod-driven cams?  Are the pushrods just an old version and everything is transforming to chains or the other way around...or not at all?  Just looking for some explanation, history, and downsides/upsides...
    • yugnats
      1991 Bayou 220 No spark, no headlights, no dash lights, won't crank
      By yugnats
      Hi all, I was gifted this Bayou but she's been sitting quite some time. It won't crank using the factory start button but when I jumper the starter solenoid it cranks but there is no spark. The key has power coming in on the white wire and when turned on supplies power to the brown wire coming out.

      I guess I should start with testing the pickup? I heard I may be able to jumper the wires coming from the pickup with an LED bulb and it will flash? I noticed in the manual that it should have around 110 ohms resistance so I'll check that as well. One thing I noticed was that the starter circuit relay has power on one of the black wires with the key on- this doesn't seem normal as I'm assuming the black wires are grounds? I think one of them comes from the start switch, travels through the starter circuit relay and then grounds the starter relay?
      Mine is a 1991 so it has the 7 wire CDI (ignitor) and a 2 yellow wire alternator ( as opposed to the later 3 wire type ) with another 2 wires for the source coils (black & red wires ). The pickup wires are blue and black I do believe. Any help appreciated and yes I will test the pickup ASAP.

      I'm trying to understand how the system works and I don't understand what the yellow / red wire from the kill switch does- I assume it gets grounded when the kill switch is "on" and therefore grounds the CDI so it can't activate the ignition coil? I noticed in the diagram that that yellow / red wire looks like it may be grounded by the ignition key switch when in the "off" position?
      I also don't have 12v power at any of the wires going into the CDI- doesn't the CDI need to be powered? I also read on this forum that someone used a GM HEI module in place of the factory CDI just to test it for spark- does anyone have any info on that?

      I hope I'm not missing something simple!
      Here is a link to the diagram for my bike (which was posted by another user): https://www.quadcrazy.com/atvforum/topic/13742-1988-bayou-220-lost-spark/?tab=comments#comment-101193

      Any help appreciated!
       
    • Frank Angerano
      My first trailer project.
      By Frank Angerano
      So I decided to pick up a small trailer if I could get one for the right price.  I found this one for a few hundred bucks on Craig’s list.  It is  a galvanized trailer which is exactly what I was looking for. The wood was shot and needed some minor repairs which I could care less about as long as the chassis was good. 
      I striped it down and put a new deck on. I had some vinyl realtree graphics that I had laying around so I added them to the fenders which I think worked out well. Very happy with this little guy.  
      I'm having the iron workers at my jobmake me up a few lightweight side rails that will have a 22 degree bend in them to accommodate the tires that slightly hang over the edge and will incorporate some tie down points as well. 








  • Recently Browsing   0 members

    No registered users viewing this page.


COMMUNITY SECTIONS

ATV FORUMS

QUADCRAZY MEMBERSHIP

Be a part of best online community of ATV riders and join thousands of people who love ATVs! Share your ATV photos, videos, ATV rides, get help with your ATV and more. Not a member?

SIGN UP TODAY

ADVERTISE ON QUADCRAZY

FOLLOW US ON



  • Automotive Webmaster
×
×
  • Create New...