Jump to content
Sign in to follow this  

99 CR80R Expert new top end?

Recommended Posts

I bought a 99 CR80R expert about a month ago. I dont think the top end has been replaced since about 2003. But then again it wasnt ridden alot between 2007 and the time i purchased it. It starts up first or second kick everytime i ride it and if i put it a new spark plug it always starts up first kick for a while. Ive noticed that before you hit powerband it dosnt have that much power but once you hit powerband its a rocket! Ive read that CR80's notoriously have low bottom end power though so that might be it. But i was just wondering what some signs are that i need a new top end. Thanks :smirk:

  • Like 1

Share this post


Link to post
Share on other sites

Having just picked the bike up, I would recommend putting in a new top end so that you know where you stand instead of guessing and hoping it is okay. The easiest way to know if it needs a new top end is to know what the bike feels like with a good top end and as time goes on, you will feel the difference. Kinda the old "Gee, it seems like it use to be faster." seat of the pants dyno. A top end for these bikes is fairly cheap and also it gives you the chance to get to know your bike. There are a lot of videos on how to do it. And yes, these bikes are notoriously slow on the bottom end. They are designed to be ran on the pipe at high RPMs. You could get a compression tester and check your compression. Make sure your jetting is correct and you should be good to go. Enjoy the bike.

Jim

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 
×