The Africa Twin XRV650 & XRV750 thread

Discussion in 'Land of the Rising Sun: ADV Bikes from Japan' started by iswoolley, Aug 23, 2004.

  1. Ladder106

    Ladder106 It's a short cut, really

    Joined:
    Jan 31, 2005
    Oddometer:
    5,116
    Location:
    Davis, CA

    Let us know what you find out when you get the front tire off.

    If there was no tire damage, you really didn't have a "blow - out" . Rather a sudden and rapid flat.

    I'd also suspect a tear around the valve stem.

    As a tip, I never install the top nut on the valve stem. If you run lower air pressure without rim locks, the tire will creep around on the rim. This is particularly true in the rear but it can happen in the front also.

    As the tire creeps around the rim, you will be able to see it because the valve stem angle will change. It starts out at 90 deg to the rim (if it's installed correctly). If the tire creeps the angle will become more acute. This tells you that (a) the tire is moving and (b) it's time to break the bead and shift everything back into place.

    IF

    The valve stem nut is NOT installed. If the nut IS tightened down, you will not realize the tire is creeping and the tube will eventually tear away from the stem. This causes a very rapid deflation.

    Also, I normally install a fresh tube with each tire change. Many guys are using 20 year old tubes on their bikes......they're asking for trouble.

    If you ride in the wet alot, a bit of silicone seal around the gap between the valve stem and the rim will keep most of the water out.
  2. Ladder106

    Ladder106 It's a short cut, really

    Joined:
    Jan 31, 2005
    Oddometer:
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    Andy,

    Nice photos, thanks.

    You somehow manage to make the AT look like a 250.:eek1
  3. thump

    thump Been here awhile

    Joined:
    Mar 18, 2005
    Oddometer:
    162
    Location:
    b-town,nj
    hey all, hoping that some one might have some insight to a issue with my AT. bike runs awesome at all times cold but once warmed up well and riding steady throttle at 4500 to 5500rpm the bike sputters and won't pull cleanly.running it hard through the range it seems to have no hesitation. i had the carbs off and dropped the bowls and checked jets; pretty clean. thinking a new set of plugs first and then perhaps some new slide diaphrams and springs if no improvement. Any ideas? thanks -bob
  4. Ladder106

    Ladder106 It's a short cut, really

    Joined:
    Jan 31, 2005
    Oddometer:
    5,116
    Location:
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    My guess:

    A small tear in one diaphragm. When the slide is down the tear closes and sudden increases in vacuum are strong enough to lift the slide.

    But at steady throttle, the leak opens a bit and overcomes the vacuum....slide drops and bike begins to run lean and sputter.

    Did you examine the slide diaphragms completely and carefully pull them open to look for tears? Did you put the carb tops on correctly. On some, there is a small "dent" in the top that has to be aligned with a bleed vent in the carb body. It is possible to turn the tops so that bit doesn't line up.

    What do I get if I win?
  5. DominicDomingo

    DominicDomingo axe me anything

    Joined:
    Nov 24, 2007
    Oddometer:
    7,160
    Location:
    Van City
    Thanks ladder you gave me a lot to think about. I'll post back when I get the tire off the rim and have a look.

    I guess it wasn't a blow-out, though there was only about 10 seconds from the first time I noticed a "floaty" feeling in the front end until I was running fully flat.
  6. thump

    thump Been here awhile

    Joined:
    Mar 18, 2005
    Oddometer:
    162
    Location:
    b-town,nj
    thanks for the response ladder. i'm leaning toward the diaphrams as well. they were so fragile looking i didn't really pull them apart for a thorough visual,was actually just hoping to get them back in without ruining them completely.23 years later i guess the rubber is not so good. I'll let you know if you won!
  7. Lioshyi

    Lioshyi Adventurer

    Joined:
    Jul 13, 2010
    Oddometer:
    19
    Location:
    Ukraine, Lviv
    <hr style="color:#575757; background-color:#575757" size="1"> Hi, Again I have question. If I want replace RD04 1990 engine with RD07 1994 engine what should I care about?
    Carbs (really necessary) ? etc?
    Thanks
  8. raoulserban

    raoulserban vrrummm

    Joined:
    Aug 15, 2010
    Oddometer:
    101
    Location:
    Timisoara, Romania
    hello guy's! i am Raoul from Romania and i felt in love with the AT last year when a friend of mine invited me to the 2'nd Romanian Gathering of AT owners (kept at Nadrag-City, wich is kind of a village in the mountains)
    http://youtu.be/WY4mthvvhyE
    and this is my byke, bought a couple of month after this meeting (an 04 from 1990):
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    you can see that the wife gets along with the mistress and offcourse that i am in no picture! tipically me!
    ps: thank's for the incredible amount of information regarding the AT
  9. Action Man

    Action Man n00b

    Joined:
    Feb 15, 2011
    Oddometer:
    8
    Location:
    Athens,Greece
    Welcome!
  10. Fliegenfischer

    Fliegenfischer Adventurer

    Joined:
    Jul 19, 2009
    Oddometer:
    46
    Location:
    Hannover
    Nothing, it´s the same engine.
  11. Ladder106

    Ladder106 It's a short cut, really

    Joined:
    Jan 31, 2005
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    5,116
    Location:
    Davis, CA
    Where to get the best beer.
  12. GSPD750

    GSPD750 Adventurer

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    Feb 14, 2005
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    1,469
    Location:
    Calgary, AB
  13. Lioshyi

    Lioshyi Adventurer

    Joined:
    Jul 13, 2010
    Oddometer:
    19
    Location:
    Ukraine, Lviv
    thanks guys :). Beer is present in our local store:) But my girlfried went to mountains so right now I having some sex with XRV engine replacement.
    I was asking because have very interesting story how to kill engine using gasket set of one well known company. Right now writting e-mails and if they will not do anything with that - I think you'll see lot of hi-res photos what can be if there no oil in cylinder heads.
  14. 621andy

    621andy Been here awhile

    Joined:
    Apr 1, 2011
    Oddometer:
    121
    Location:
    Turkey, Myanmar, or sometimes at home in Germany!
    Did a 250km, mostly on road tour yesterday. Firstly around our flying area, then up to around 2500m to find some snow:evil;

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  15. Joz

    Joz What could go wrong?

    Joined:
    Sep 23, 2007
    Oddometer:
    1,901
    Location:
    Colorado
    Took the long way home yesterday:

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  16. Ladder106

    Ladder106 It's a short cut, really

    Joined:
    Jan 31, 2005
    Oddometer:
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    Great photos Andy and Joz.

    Andy your scenery is spectacular. Mountains, balloons and motorcycles....WOW.

    Joz, I really like your first shot with the road heading off to the horizon.

    The AT is certainly the perfect bike for both areas
  17. HitTheRoad

    HitTheRoad Adventurer

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    Dec 2, 2009
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    16
    Location:
    Polska
    i can made it for You. I put this for 4 AT already ;)

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  18. DC Chad

    DC Chad Been here awhile

    Joined:
    Dec 21, 2006
    Oddometer:
    322
    Location:
    wickford, essex, UK
    time to sort the old girl out . get her from the corner where she has sat unloved for the last couple of years:cry
    [​IMG]

    good news is a donor RD03 has been found with low mileage that i hope to pick up next weeks and the parts from that bike will give this project the kick up the ass i need:evil
  19. The Apostle

    The Apostle Adventurer

    Joined:
    Feb 20, 2011
    Oddometer:
    29
    Location:
    Athens, Greece
    I am thinking of selling my RD04' 92 AT :cry
    It still works but soon enough it's going to need a major service, really major.
    Since this period I have no job and I am back to the university studying I can not afford to repair it. I could store it but there will be a few years before restoring it.
    So what's your opinion?? ( I know that most of you will tell me to keep it but maybe there is a third option )
  20. Stormforce8

    Stormforce8 Farkle Tart

    Joined:
    Nov 1, 2006
    Oddometer:
    547
    Location:
    New Forest, England
    What do you mean by 'Major Service'?

    Oh - and yes of course you should keep it :lol3:evil:lol3:evil