Quantcast
Jump to content


2002 honda recon 250 top end problems


Recommended Posts

I have a honda recon 250 that i just bought. the compression is around 90 needs to be rebuilt. im getting into rebuilding it took apart the top end no problem except for the cylinder walls. as shown in the pictures. the way the piston sits in the cylinder is if you were sitting on the wheeler the skirt on the piston is left to right. so the wrist pin is front to back. which is where the two marks are in the cylinder. so that means the connecting rod is making the piston slap the cylinder on the wrist pin side which seems like a weird way for the cylinder to be moving. not natural. now the connecting rod has slight play left to right but not up and down. ive talked to a few people they say it might be the roller bearings in the connecting rod where it meets the crankshaft. but the play it has is not that much. im just looking for some more input before i start splitting the case. 

20200314_111639.jpg

20200314_111659.jpg

20200314_111708.jpg

Piston diagram.jpg

Link to comment
Share on other sites

Welcome to Quadcrazy @matthew smith 

The movement left to right is perfectly fine. If there is up and down then there is a problem.  
Honestly if the compression is that low then a new piston and rings are in need. 
Also a honer VERY LIGHTLY ran through the cylinder jug would be good. 
Also a valve adjustment should be done as well.  
Other then that you should be good to go. 

Link to comment
Share on other sites

Skirt slap in the cylinder like that is not totally unusual when the rings are worn completely out.  Chevy 5.3's often have that same skirt slap.  I'd run a hone through it and see if they clean up.  If they don't and are deep enough to feel with your fingernail it either needs to be bored up a size or a new cylinder.  If i was flipping that thing i'd put a cheap cylinder and piston on it and send it on it's way.  If i was keeping it to ride for a while i'd either bore it or get a better quality Weisco kit or similar.

  • Thanks 1
Link to comment
Share on other sites

so im replacing the cylinder , piston and rings brand new already have the parts. but that is not skirt slap. it is slapping on the wrist pin sides. which is an unnatural movement for the piston. the skirt side is fine. which is left to right inside the cylinder. so the gauges on the piston are on the same side that the connecting rode has play. i thought the slight movement in the connecting rod was normal. play up and down is not good which it is not doing. 

Link to comment
Share on other sites

Left and right movement is normal because the cylinder and piston keep it from moving left to right once the piston is in. 
The only other reason i could think of would be the wrist pin and bearing at the piston? The bearing could be bad or check the top of the connecting rod where the wrist pin goes through and make sure its not egged. (Oval from a worn out bearing) 

 

Hopefully you are putting in new valve stem seals?

Link to comment
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 Forum Topics

    • By BruceG
      Hi guys. I have a problem where the quad will start and run well for about 5 minutes and then it dies. On inspection the airbox has oil in it (quite a lot). The oil is pumping through the cylinder head breather hose. This problem first happened suddenly. I have since done the top end including, piston, gaskets, rings and valves. I have also done the carb (not that I thought that this was the problem). The compression seems normal. The only thing that I can think of, is that I did not grind the valves well enough. Anyone experienced this? If so, how did you fix it? Any other thoughts?
    • By BenJammin
      I did a compression test on my 2005 Bombardier Traxter 650 CVT and it's 75 PSI.  service manual only talks about leak down test.  No specification for engine compression the manual.  What does 75 PSI tell me?  Thank in advance.
       
      A little history of this machine.  640 miles.  Picked it up about 2 years ago, not running. Probably the computer.  Tested all circuits and confirm it was the computer.  Long story short, I watched a Youtube video and fixed the computer. ATV now started and runs.  BUT, it tops out 20 MPH.  I cleaned the carb 3 times also using a Mikuni carb kit after the second time.  Slide in carb is going up and down.  Only adjustment for fuel is at 1.5 turns out.  NGK Sparkplug had soot on main part but brown on the electrode.  Champion sparkplug is brown.  I check CVT clutches and they both appear to engage like they suppose to.  Checked valve clearance it's 0.00, I can't get any feeler gauges in-between.  I check timing chain I believe it's in the correct position and hasn't skipped.  I removed muffler plug and drilled into muffler to try and make sure it wasn't plugged.
    • By Mhatayas
      My uncle bought a Baja 250, 2006. Knew there was no spark since the get go. He don't know anything about quads so is getting me to help him try to get it running...
       
      battery is bad so I connected battery charger to it to crank it over , cranks over well , but no spark .... 
      Lights and everything work fine , but with each crank over using the e start switch , the display reads 999 888 777 666 ... Right down to 000 and repeats itself . 
       
      He managed to get a parts bike , I changed over the CDI and the coil and the stator from the parts bike and there was another black box by the voltage regulator I changed over ... I used my multimeter to confirm as much as I could works , it's hard without knowing which wires are which , and I cannot find any diagrams online for this bike ? 
       
      Do you think it could be the Killswitch? There's so many wires coming from there I don't know where to start . Also I should mention it appears the fan on the front of the bike has been taken off (the wires have been cut too ) 
       
      If this bike sparked it would run . The previous owner said he parked it one day and it just wouldn't start after.
    • By semicolon
      Hi, I am having issues with my TRX350D fuel pump.  It suddenly stopped running so I have replaced all the fuses and cleaned all the terminals.  I have fitted a new pump, fuel cut-off relay and rectifier.  Still nothing!!  The pump runs when attached to a battery.  The engine will start on the choke and the filter fills with fuel but it will  not rev and dies when the choke is closed. I have power to the relay but nothing at the pump black/white wire when cranking the engine.  Any ideas where to go from here would be very much appreciated!!
       
    • By McG75
      1996 4x4 Timberwolf rearend width. Can someone with some knowledge of these machines answer this question for me please. Are all 4x4 timberwolves this narrow in the rearend? These tires are so close the right one actually rubs the muffler.  Thinking about seeing if there are any spacers out there for it. I need at least an inch more clearance. 
      .
       
       
×
×
  • Create New...