Quantcast
Jump to content

Recommended Posts

Posted

hey, me and a buddy have been working on his 2003 ltz 400 for a week or so now. He has bad compression and starting problems. We tore down the top end, expecting to find a bad ring or something along those lines, all of his rings were stuck shut inside the piston, we cleaned out the rings and ring seats, freed them up. Still bad compression.. So we tool the valves apart, found out that he had a couple of slightly bent valves, we replaced those, got the wheeler back apart, still low compression and wont start. During these tear downs, we did not replace the gaskets, as you can guess they are pretty worn by now. Is this leading to his compression problems? If not does anyone else have any suggestions, because im out of ideas :P.

Thanks.

Posted

just do it right and do it once.... stuck rings= bad sign...

just a cleanup wont make the rings new again- they are shot.

sounds like you'll need a bore job, a new piston and rings.

as for the valves- ashop can do that for you.

buy a gasket set- shop around online you'll find one at a decent price.

if it's worn out- and it sounds like it- there's only one way to fix it.

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 Gwbarm
      I finally got around to working on the TRX, this has been an ongoing problem with this machine. This is a machine that we keep on my Fathers property, i dont see it that often, my brother haad it professionally repaired last year and year before same problem, the new starter gears and bypass gears last about a year and the machine is not used that often, he said he was done with it , so i thought i should go take a look. Sure enough the gears were all malled again. 
       

       

      IMG_4910.mov   There is some slack in there but most is taken up by the gear cover,if anyone with history with these machines has had the same problem, let me know your findings. Where i am now im looking for finding replacement honda gears on Ebay and try those. I suspect the original was replaced with aftermarket gears years ago and they just worse quality as the years go by. 
    • By PIYIRIO
      Hi all - I recently had a shop fix this quad and it hasn't been right since. The jug was resealed as it was leaking, the rings were replaced, and the valve stem seals replaced. Shop said the cylinder walls were great so nothing was done there. The motor still smokes, heavily on startup and all but quits once warmed up. Enough that I can live with it if I can fix what I came to ask about. I mentioned this work because since I've gotten it back it seems like it has power but tops out at a much slower speed than before. It's old so I don't have a speedo but I pulled out my phone at it tops out at 25 mph. I know before the work, I was getting up to 45+ mph... It's so bad, my 10 year old daughter is pulling away and straight leaving me in the dust with her governed Polaris 90.
      Given the work done, what are some thing I could be the cause of such a drastic difference? I immediately thought timing but the marks appear to match up with a youtube video I found... no idea if it's correct though. It sat in another shop for 2 months and they gave me an $800 quote just for the starter... it pull starts fine. 
      FYI: I would take it back to the original shop to figure out but I had some issues that make them a no-go for me. 
    • By alain
      I just got this quad from my father in law need some tlc. Will need a new battery and does not know the battery PN as I don't have service manual. When my father in law had it , it uses lots of plugs, never got it service to verified why , he just buy an other plug and was good for a other 4 to 6 months .
      Any one would havd answers would be appreciated. Thanks
    • By wheeliewayne
      my  2012 big bear 400 is hard shifting  can anyone help me
    • By DZL1
      Question for you guys. I have a 98 bayou 220 that I picked up cheap cause it's wasn't running. So it's has very low compression. It is getting spark and fuel. 
      What should my next course of action be? Any other tests I should perform or where to start looking?
      Thanks in advance.
×
×
  • Create New...