XR650R Thread!

Discussion in 'Thumpers' started by JustinT, Nov 24, 2008.

  1. nick5446

    nick5446 Adventurer

    Joined:
    Nov 29, 2011
    Oddometer:
    99
    Location:
    east -> west -> north -> east
    No an expert, but all an ICE needs to run is fuel, air and spark. If you've got spark, shoot some starting fluid in there and it should fire. If it starts and then dies then you've got a fuel delivery issue. If it doesn't do anything, then you don't have good or consistent spark.

    Also, if you installed an auto-decompressor (sounds like you did), it should be working fine if it's hard to turn over like you say it is.

    CDI sounds suspect to me if you put a used eBay one on. They're prone to failure anyway and you've got one that (in my mind) is suspect anyway. Their failure can be intermittent.

    Take a video of you trying to start it. "No start" symptoms can vary greatly and mean a lot of different things.

    Is the gas on?? :evil
  2. RideFreak

    RideFreak Torque Junkie

    Joined:
    Apr 17, 2009
    Oddometer:
    8,600
    Location:
    Out in the NM Dez somewhere
    Alan, the XR400 CDIs are pretty reliable, like the 650R OE unit they are made with honda's typical quality, yes it could be that but symptoms sound the same with both. Stick the 650R cdi on, (they start a little easier without the extra advance). Carb symptoms sound similar across both carbs so I'm thinking it's not that. Aside from a clogged jet, they don't just quit.

    Have you gone back into the topend and seen if there is a tight valve, that will make them a bitch to start and with recent topend work, the valves will typically tighten up to some extent as they seat into the head after a rebuild. Tight valve can cause firing back through the carb too. Since it ran ok initially, assembly was probably ok. Personally I'd avoid starting fluid, it can cause as many problem as it solves and doesn't seem to be helping anyway.

    I'm not against a good pull start though, tie the rope to the pull vehicle and wrap it around the rh footpeg once with the end coming up to your hand on the bars (with enough slack to allow for turning the bars and using the throttle). Use pressure with your rh foot to keep it secured to the "pulled" bike, if anything goes wrong release the end in your hand and lift your foot, it will come right off. Use 3rd or 4th and let the clutch out easy at about 20mph.

    Pickup can be tested with an OHM meter, specs are in the service manual. Also purchasing a part from e-bay has no bearing on it's reliability, I've bought and sold many items on E-bay, have yet to get a bad MC componet. Chineese electronics, yes but not MC parts, yes it could be bad but you can buy bad parts anywhere, E-bay has nothing to do with it.
  3. lstzephyr

    lstzephyr Solo con rambo

    Joined:
    Jul 13, 2006
    Oddometer:
    1,781
    Location:
    Huntsville, Al
    Responses in red. I guess checking the coil pickup is my next step.

    I'll try a pull start when it warms up outside.

    Thanks!

    Yep the gas is on. :lol3 I did that once with my xr600r I owned before this bike. I rode this bike daily for a year or two and never had an issue starting it. I'm assuming my kicking technique and general pre-start voodoo dance is correct.

    Thanks for the ideas!
  4. ZXRaziel

    ZXRaziel Been here awhile

    Joined:
    Jul 14, 2012
    Oddometer:
    998
    Location:
    Grey skyes and rain of Good old England ( NEast)


    I use the genuine pads for the front and
    Goldfren S3 Ceramic Carbon

    for the rear end , i like to have more agressive bite for the rear brake , but that is just personal preference .
  5. ZXRaziel

    ZXRaziel Been here awhile

    Joined:
    Jul 14, 2012
    Oddometer:
    998
    Location:
    Grey skyes and rain of Good old England ( NEast)

    Going to check it out .
  6. Kiko

    Kiko Long timer

    Joined:
    Feb 23, 2006
    Oddometer:
    2,174
    Location:
    Jalisco, Mexico 45800
    Great tip. Thanks.
  7. walkergreenlabel

    walkergreenlabel Been here awhile

    Joined:
    Mar 18, 2010
    Oddometer:
    198
    Location:
    Oakville, ON
    I have been reading all of this thread. I'm up to page 527 and have learned a lot so thanks to all. one thing i am going to do is suspension work. I don't know yet how extensive its going to get. I think the bike is a little under sprung for me at 215 lbs plus riding gear tools etc. it will depend on costs so if you have an idea (ballpark) of some of the costs let me know:

    do the work myself
    new springs front and rear
    new valves for forks

    take everything in to reputable shop and have them do the work.
  8. oldxr

    oldxr Long timer

    Joined:
    Jan 28, 2007
    Oddometer:
    1,169
    Location:
    central komifornia
    Walker-find the old Borynack files on xrr suspension.There is 1 file for the front and 1 for the back shock.Rumor has it that the shim stacks were copied from a suspension prepped by precision concepts baja racer.
  9. pwrtrippin

    pwrtrippin Been here awhile

    Joined:
    Jun 7, 2009
    Oddometer:
    466
    Location:
    Woodland Park,CO
    Its possible to shear the woodruff key and throw the timing way off. Bought a bike with this problem.

    For some reason to me it sounds like the ignition timing is off since it is back firing. I'm not sure but I think the piggy is a lost spark system ( fires every revolution) so i don't think it is possible to time the engine 360degrees off.

    Have you pulled the stator cover off? To check the stator, I would check for continuity between the stator windings, disconnect all the wires. Green and White/yellow stripe, then check the same wires to a frame ground. These are your power leads for headlight tail light. Next do the same thing with the Brown and Black/red stripe. These are your power for the CDI and coil. There should be continuity between the wires but not to ground. Do the same with Blue/ yellow strip and the Green/ white stripe. These are your pickup, once again you should have continuity between the wires but not to ground.

    I think form the sounds of it the stator is good though. I would definately look more into ignition timing issues.

  10. Adamco2

    Adamco2 Part time adventurer

    Joined:
    Sep 4, 2004
    Oddometer:
    127
    Location:
    Santa Cruz
    Picked up my first XRR a couple of weeks ago and am in the process of cleaning it up and fixing anything I find that needs attention. I took it out to my local OHV park and spent the day getting used to it and figuring out what needed to be done right away. The thing fired right up and ran straight and strong. I was very impressed with the power and stability. :thumb
    I am going to start from the front and work my way back. I have pulled the front end apart and plan to:
    1. Change the fork oil
    2. Grease the steering head bearings
    3. Cleaning up the seals and bearings on the front wheel.
    4. New throttle cables are on order from Motion Pro and I will probably order brake and clutch/decomp cables as well.
    5. New gaskets and hoses for the carb (it is leaking a little.)
    6. Upgrade the seat.
    7. Pull the rear shock and swing arm for cleaning and grease.
    8. Clean the rear wheel seals and bearings.

    I am in the early stages of planning a trip to Northern Nevada this spring and would like to make the most reliable bike I can for the trip. Any other suggestions or comments would be much appreciated.:beer

    Thanks,

    Adam
    <a href="http://s954.beta.photobucket.com/user/adamco2/media/IMG_1387_zps584a0eb1.jpg.html" target="_blank"><img src="http://i954.photobucket.com/albums/ae21/adamco2/IMG_1387_zps584a0eb1.jpg" border="0" alt=" photo IMG_1387_zps584a0eb1.jpg"/></a>
  11. Beserker

    Beserker Red Rider

    Joined:
    Sep 19, 2007
    Oddometer:
    94
    Location:
    Down South
    Quick to check though, and worthwile if you got the bike from somebody that is not an experianced mech
  12. Kiko

    Kiko Long timer

    Joined:
    Feb 23, 2006
    Oddometer:
    2,174
    Location:
    Jalisco, Mexico 45800
    Picked up my first XRR a couple of weeks ago and am in the process of cleaning it up and fixing anything I find that needs attention. Any other suggestions or comments would be much appreciated.:beer

    Fix the right foot peg. If you ride at night, dump the stock light and go HID.
  13. BuRPsa

    BuRPsa Finally growing up..

    Joined:
    Feb 5, 2011
    Oddometer:
    548
    Location:
    Pretoria
    Just a hunch Allan, 'false air' - go check the head2manifold & manifold2carb connections, plus that one screw/bolt on top of the head? If it leaks air somewhere here then you know it'll be a bastid to start, and won't like to idle then too. I'd check this before you dig in deep again, causes often are simple things.
    Goodluck!


    Edit: also, if std carb then plug (with a tiny drop of epoxy or silicone) the small hole in the carb's small lhs-cover under which a membrane sits. You need to do this anyway to stop leaning-off on overrun, but this 'fix' also gives you peave of mind if ever that membrane tears.
  14. achile

    achile Been here awhile

    Joined:
    Aug 14, 2007
    Oddometer:
    289
    Location:
    Brasov, Romania
    Strip it to the frame and engine. Check the clutch bushing, check the timing chain, camshaft, tappets and the valve ends.
    Wash everything and put it back togeder with lots of grease. :deal
    Get yourself a beer-buddy with extensive knowledge of the piggy, get a lot of beer and knock yourself out :evil. I do this two times every year.

    This was my first guide: http://www.xr650r.us/issues/
  15. BuRPsa

    BuRPsa Finally growing up..

    Joined:
    Feb 5, 2011
    Oddometer:
    548
    Location:
    Pretoria

    Yip, spark every revolution - anyone with a Trailtech computer should know this.

    I also was thinking about 'off timing', although a bit unlikely I think. The XRR fires (on kicking) at precisely TDC, the CDI starts to advance at crank speeds higher than by kicking it round.
    "Too early" (before TDC) would cause kickbacks causing the decomp to act. Snorting into the exhaust, plus maybe coughing back into the airbox. If no decomp-system present (non-std cam but for the genuine HRC) then it might break a leg/foot, but notice you fooken will!
    "Too late" would cause normal starting & running but just a bit lousy, unless of course when it is heaps off the mark.

    Off-timing could be caused either by a worn/damaged key-match, or the trailing edge of the welded-on plate (rectangular protrusion) on the rotor/flywheel is damaged. Both not common problems - but maybe worth checking if Ist got it off anyway?
  16. PineyMountainRacing

    PineyMountainRacing Oops....

    Joined:
    Jul 2, 2008
    Oddometer:
    2,846
    Location:
    Sarasota, FL / Sylva, NC
    what's the distance on the OEM oil dipstick from the bottom of the threads to the "HIgh" oil level, maybe the "LOW" oil level too? My XR-R came with an oil sight tube, I don't have the original dipstick so I'm not sure where the oil should be in the tube? I thought I'd put a couple marks on the frame for when I forget a couple years from now.

    My XR with the new 19" I built (I have a "like new" OEM 21 rim and spokes if anyone needs it)

    [​IMG]
  17. hontri

    hontri Global Bummer!

    Joined:
    Nov 6, 2009
    Oddometer:
    307
    Location:
    Summerland B.C.
    Here is a pic for you. Hi and low marks are black ink marked on the steel oil return tube next to the clear sight tube.These correspond to the marks on the dipstick.
    [​IMG]
  18. Beserker

    Beserker Red Rider

    Joined:
    Sep 19, 2007
    Oddometer:
    94
    Location:
    Down South

    And I was thinking I'll send my bony to you for it's next pre-big trip check over..

    Learning a lot here, thanks "Bart-bek"
  19. Adamco2

    Adamco2 Part time adventurer

    Joined:
    Sep 4, 2004
    Oddometer:
    127
    Location:
    Santa Cruz
    Thanks Kiko- The footpeg has already been done and I'm hoping to be able to afford an 8" light before June.

    Achile- I'm hoping to have the time for a complete disassembly. What am I looking for with the cam chain? Is it stretch? How do you tell?

    Thanks,

    Adam
  20. bill pierce

    bill pierce I don't wana pickle

    Joined:
    Mar 17, 2007
    Oddometer:
    741
    Location:
    Rockford, Wa
    Very nice clean xrr you have there :thumb