Quantcast
Jump to content

Recommended Posts

Posted

I have a 1985 moto 4 200 the rings aren't all that good and it has a knock but it ran great i left it outside in 20 degree weather for a couple of hours and it fired right up no problem and after a minute of it running it died as if i shut it off as if using the kill switch to kill it but i didn't and it has spark and compression and spraying carb cleaner in the cylinder didn't start it I am out of ideas any ideas of what it is?

Posted

it's a knock and we have been running it all summer with the knock and it doesn't seem to be getting worse lol the rings were ruined by the person we bought it from by trying to go up a steep hill in second going 2 miles and hour. also before we bought it.

Posted

There should be dots on the timing gears to line up with the head. Make sure your at top dead center on the intake stroke with the piston. There should be a mark on the flywheel to line up as well. Take the timing chain adjuster and loosen it so your timing chain jumps teeth on the cams. Then roll your cams to spec.

Sent from my SM-N920V using Tapatalk

Posted

What are the marks on the piston.  Did you scrape it like that, is that a crack ? Maybe spray it with starting fluid to clean it up  Did the valve hit the piston ? 

After you clean it up with the starting fluid be sure to spray the cylinder head with WD-40 to lube it back up before you move the piston up and down.   

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 Forum Topics

    • By ButchM
      Hisun 700 EFI. Replaced TMAP sensor had broken off . Fuel pump pressure 41psi. The only way I can keep it running (and runs fine) is to close off fuel return line. 
    • By dkgg5755
      This thing came with a cheap aftermarket carb on it the problem I'm having is it won't start with choke installed into carburetor it will start and get run without it installed then bogs out after about 2 min run time I've checked timing , compression, checked valves for proper clearance , also did a smoke test for air leaks found none. 
    • By BillR94
      I picked up this ATV that had no spark. The previous owner said he was driving it and it died and would not start. He discovered it had no spark. He replaced the CDI and the coil with no luck. He got tired of it and I bought it. I replaced the stater and now it has strong spark. Now, it starts for a second or two then dies. It will not stay running. I have checked the timing and it is spot on. The valves are adjusted correctly. I see no warn issues with the cam. I put the original CDI and coil back on it. Same problem exists. Compression is at 65 psi (has decompression mechanism),
      I took off the muffler in case the issue was clogged pipes. No change. I replaced the spark plug. No change. The carb was an aftermarket so I put a Niche carb on with no change. I bypassed the fuel pump and that did nothing to solve the problem. 
      I don't know if this is a carb issue or an ignition issue. I am looking around locally for an OEM carb to try out but not sure that will fix the problem. 
      Can anyone help me solve this problem. I am running out of ideas. 
      Thank you for your time
      Bill
       
    • By joezee13
      After turning off engine in neutral  starter wont engage If I rock unit back and forth it engages Getting progressive worse.
    • By middlebrookgt
      Hi All.  I introduced myself some weeks ago with my 2006 LT-F400F that needed a list of repairs including replacing the cracked generator cover.  It is back together as of last night and cranks up, idles and revs high pretty well.  Needs some fine tuning and stop backfiring at stop.
      The big issue is it will not go into gear.  I reassembled the insides with help from y’all’s posts.  The transfer selector moves from H-L-R, and the foot shifter moves thru the gears and finds neutral easily enough.  Before I tear it back open, the  transfer selector on top does not move as far as the repair manual says.  The diagram shows the shaft moving something like 40 degrees between L and H and 50+ degrees between L and R but it doesn’t move that far even though it finds the indent areas and moves well.  
      Could this be the problem.  I aligned all the dots on the shifter gears inside and it appeared to not be binding anywhere.  I do hear the gears touching when I shift like they are trying to engage, but zero movement from the ARV
      It was somewhat difficult to tell whether all the parts are installed on each shaft.
      Are there better/bigger photos somewhere that would allow me to be confident I included all the washers and bushings, etc?  If I had any doubt on parts that were laying inside after the cover broke then I purchased replacements from online stores.
      TIA for any input or feedback!!  Pics are from when I first took the generator cover off.


×
×
  • Create New...