Jump to content
Sign in to follow this  

CR85 Big end bearing play tolerances...

Recommended Posts

Hi just picked up a 2005 CR85 and am going through the bike and wanted to check the tolerance play of the big end bearing of the crank arm.

Does anybody know how and what to look for??

Thanks in advance.

Share this post


Link to post
Share on other sites

Do you mean the bearing on the right side of the case? The only way I would know how to do that without taking it apart would be to take the jug off and see if the rod pulls up and to the right.

Share this post


Link to post
Share on other sites

I'm talking about the con rod play. It does have some side to side play but the up and down play is hard too measure by hand. I heard a dial indicator will do the job for the up and down(if it has any play at all) and feeler gauges for the side to side.

Does anyone know what the spec play of the con rod for the CR85?

Share this post


Link to post
Share on other sites

up and down play is bad. there should not be any.

as for side to side i have no idea off of the top of my head but i think it should only be maybe .003''

Share this post


Link to post
Share on other sites
up and down play is bad. there should not be any.

as for side to side i have no idea off of the top of my head but i think it should only be maybe .003''

I think it can be slightly more then that because I just bought a new one and it has a lot more play then that, I did not measure. make sure your crank is aligned right as well or else it will start to warp, making it move from side to side more.

Share this post


Link to post
Share on other sites

If your bottom end bearing on the connecting rod has ANY up and down play, your crankshaft is on a very short lifespan. It should only have a small amount of side to side play but any up and down means kaboom in the near future if you try to run it.

Share this post


Link to post
Share on other sites

K just got a hold of a Honda service tech and he read from the service manual that the play should be between .006" to .022"! (Wow pretty big). Now I was able to put a .019" feeler gauge in between the gap when pushed to one side. He also mentioned anything over .030" is too much and is time to replace.

And I found no radial (up and down) movement.

So I guess all is well down below!

Thanks everyone for your input.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Reply with:

Sign in to follow this  

  • Similar Content

    • By D.Barrett
      Kicking around the idea of selling my CR250. I have other bikes and never get a chance to ride this one.

      This is a well-maintained bike with tons of aftermarket parts. It's set up primarily for woods/single-track riding, but will still do just fine on an MX track.

      Engine:
      -Fresh Pro-X top end(<1 hour)
      -FMF Gnarly pipe & FMF Shorty silencer(<1 hour on fresh packing)
      -PWK Air-Striker Carburetor(bought new from JD Jetting last year)
      -Steahy 10oz. Flywheel Weight
      -Boyesen Rad Valve with Carbon-fiber reeds
      -TwinAir air filter

      Misc:
      -Excel Pro-Series Wheels(19"/21")
      -Brand-new Shinko tires(546 Front, 505 Cheater Rear not mounted yet) w/ Heavy-duty tubes
      -Works Connection Radiator Guards
      -Skid Plate
      -FMF Factory 909 Handlebars
      -Polished Frame
      -Sunstar 13/51 Steel Sprockets(new in box)

      I'm sure I'm missing a few odds and ends. Comes with a Bill of Sale only. (708)287-1998 - Dave
    • By waldo
      Parting out 2000 cr 250r: frame 150.00, seat with brand new fx cover 30.00, sub frame 30.00, pro circuit works pipe 50.00, kick starter 10 bucks, tank with shrouds 30.00, rear shock 45.00, swing arm 40.00.  make offer on all other parts in picture. Buyer pays shipping from 36092 zip. 
    • By BabyGroot69
      Hello,
      I could not seem to find a similar thread so if one exists I apologize. I have an 02 cr250r with an 01 motor. I need to buy a new silencer with a spark arrestor because the current one does not have one. I am not sure if the owner before me used an 01 or 02 silencer because I have read the frame had significant changes from 01 to 02. Any thoughts? Thanks!
    • By Christo6060
      I want to restore a 1996 cr80 that doesn’t have any graphics and absolutely love the 1994 cr125r tank shroud graphics, I can’t seem to find anything that fits the cr80 with those graphics. I found one last week but lost the page and couldn’t track it down again, do the cr125r graphics fit the cr80 tank shrouds? or does anyone know where someone could make them for cheap or know about any in Australia 

    • By cerialsledder
      Hey guys,
       
      Could someone please explain the numbers on a needle jet for a mikuni carb?  I'm currently running a 38-73 needle but a lot of the people I talk to say I would be happier running a 38-70 needle.  I don't have a problem with going with what other recommend but I would like to understand the numbering for the needles first.  I understand the nozzle sizes, main jet and pilot jet it's just this damn needle thingamobob
       
      Thanks a lot 
×