BMW G650X Challenge Thread Index

Discussion in 'Thumpers' started by GB, Apr 24, 2008.

  1. opm22

    opm22 n00b

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    hello my friends. first of all, sorry for this question that can seem little ridiculous for a mechanical engineer...

    it's related to the clutch mechanism/case failure in the 2007 G650X. I decide not to change the entire case and instead I'm going to ask a local machinist to make a bushing for the clutch case hole, as others here already did.

    My newbie question is about the measures of the hole in the case compared to the release bearing (BMW #21217709526) that goes in it. How much "play" (or clearance) is supposed to have between these two in order to not have any issue as:

    1. too much "play"/clearance between the two, of course, as this is the very first reason I'm doing this, to remove the excess of wear in the case hole;
    2. extreme low clearance between the two pieces making clutch engagement and disengagement sticky/heavy or even stuck.

    I know I could simply trust my machinist, but that's not the case. I want to make sure and, most importantly, to learn.
  2. Dutchgit

    Dutchgit Completely clogless

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    Have the machinist measure the hole. It'll only have worn on one "side" so measuring between two non worn sides will give you the answer.
    Big Fella and keepshoveling like this.
  3. snooker

    snooker AttitudeIsEverything

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    I have the original OEM exhaust can I removed when I got my bike, in fine shape. If interested then let me know..

    -snooker
    I'm baaaa-aaaack...

    Hi guys!! (and where are all the gals we used to have???) I've not been logged onto ADV for a few months over the winter, so it took me a few HOURS just to catch up on this ONE thread! I'll try to be on more these days, but it was great to still see all the interest in our little X bike!

    I still love my XCountry and it is my main moto, though I admit a year ago I got an '09 KTM 450 XC-W to replace my XR400 in order to get an electric starter and it has a Rekluse clutch that works like they really should - it is amazing the technical obstacles I can stop and then simply crawl over in first gear without using the clutch at all, and get total traction without slipping, all while paddling my feet in extreme cases, like uphill roots and boulders. I don't ride the single-track technical much, but 2 serious weeks a year and some minor stuff in between. Then I get back on the XCountry and still feel like it is the biggest little dirt bike and pavement cruiser I would want. It is just perfect! But I digress...

    As to the pic of the cracked swingarm above....
    Yikes! Failure? What failure?? That's not a failure yet (yeah right!) but I wouldn't ride it. I was going about 50 when mine crapped out, I blame it on a bad shock that bottomed out a lot so I had to ride it slowly to prevent bottoming but some obstacles just creep up on you, this was with the Wilbers shock but it was never working properly on my bike. I had bottomed hard once the day before and it was all just too much for that fine BMW metallurgy. Other than mine I read about one in Europe years ago but it was involved in an accident on the street and in my mind it was inconclusive as to whether the swingarm failed first and caused the accident (per the owner) or whether the crash was first and cause the swingarm to break. Another one I heard about was Simon Pavey perhaps but more legend I don't remember any pictures.

    Put it this way. It happened to ME and I luckily didn't get hurt but if I thought is was a real problem do you think I'd be riding it for another 5 years doing 80 on the highway or riding cliffs in Moab??? :jump
    Don't think about it at all anymore except when it comes back up here... I guess I'm now part of the X bike urban legend... haha. p.s. thanks again tbarstow for picking me up that day! :beer
  4. snooker

    snooker AttitudeIsEverything

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    Cool news about the new gas cap - way to go man! I already bought Tim's fix but haven't had the need to install it yet, not sure which one I'd prefer but like I just said, I OWE Tim so I'll support him! (I need to dig up that picture of our 2 dead X bikes from LAB2V in November 2010 - my swingarm and Tim's broken shifter shaft - yikes!)

    I do have plans for longer trips and plan on buying the XTank and the Mosko Moto Reckless 80 bags, and making my own simple very minimal tubing to mount from my little BMW tail rack to the footpeg mounts to keep the MM bags out and away from the the XTank and exhaust. Lets call them bag guards instead of a rack. Someday...

    I think the MM R80 bag looks awesome. I tried one one last fall in the parking lot when Dusty came up to let me try his on my XCo, I think with some custom bag guards this is THE way to go. There are Pros and Cons vs the Magadan (theft being a plus for the Magadan), but the R80 just has SO many damn features and accessibility!
  5. snooker

    snooker AttitudeIsEverything

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    Also Dutchie, I like hearing your sage advice like if the water pump ain't broke (just weeping) then don't fix it! Mine just started weeping last fall (it is kindof back in behind there not on the outside of the case, but feels like coolant so I guess that is the weep location). I assume it will get worse but does something catastrophic happen if it isn't fixed or just keep weeping a little bit more and more??
  6. Meriden

    Meriden Yea whatever

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    Wondered if you bought the Mosko Moto's yet. Still interest in your review.
  7. eaglescan

    eaglescan Borrego rocks

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    That will work OK, it would be the measurement on the vertical part of the hole. When we did my bushing , I allowed about .003 thousands of an inch.
    Dutchgit, keepshoveling and opm22 like this.
  8. durielk

    durielk Adventurer

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    I had a little issue with the battery at the gas station last week & wanted to see what any of you all think.

    Has anyone, ever, under any circumstance BUMP STARTED their XCountry or XChallenge?
    My buddy and I tried but could not, tried him pushing, me pushing, tried 2, 3, 4th.... it either just skidded the rear tire, or just barely turned over and would not come to life. The battery was not completely dead, so the pump and electronics should have been working.
    I did not try hitting the starter button while in gear, usually there is a lockout on that.

    I would be interested if it is possible, maybe with a 1 block 15% hill?????
  9. tbarstow

    tbarstow Two-wheelin' Fool

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    Yes, I have bump started an Xchallenge. I did have the luxury of being at the top of an extremely steep grade on the side of a mountain and got it rolling to 20mph and started it in 2nd. If you are on a flat, you will need a tow to do it. It takes a second for the generator to put out enough juice to deal with the dead battery, after that, don't stop until you get home.
  10. jonnyc21

    jonnyc21 Trials Ninja

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    Bump started mine in 4th on a slight down hill all by myself but wasn't easy.

    My battery wasn't great but could spin over the bike a bit but not quick enough to make it start.
  11. Ducksbane

    Ducksbane Quaaack!!!

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    I have bump started mine on a steep hill in town a few times, no problems. I have however moved to where I might have to push it up the hill first!
  12. Meriden

    Meriden Yea whatever

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    Yes I've bump started the X by pulling it with another bike.
  13. opm22

    opm22 n00b

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    unfortunately that's not possible any more, the hole is already widened.

    thanks, I will try with this clearance. One question though, can you tell me if in your case and with this clearance the release bearing could move only with your bare hands? What I want to confirm is that it is suppose to slide in and out easily.
  14. keepshoveling

    keepshoveling Long timer

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    I've bump started mine before in second, but it took me and another guy pushing and then he hopped on and got it started. I am, to put it as kindly as I possibly can, built like a brick shithouse and I had to really work at pushing it so frankly I wouldn't expect everyone to be able to get it going. Not sure I could do it myself either, I definitely felt it wanting to kick and skid when the other guy hopped on and started it but I used the brute force method and that worked out alright for me.
  15. tbarstow

    tbarstow Two-wheelin' Fool

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    The clearance is the same top to bottom, 90 degrees off of the worn area. There are also standard clearances for bushings in the Machinist's Handbook.
  16. Cam805

    Cam805 Been here awhile

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    Mine did the same, but quickly progressed to coolant temp warning MIL at stop lights. Not wanting to brick the motor, I took that as a sign. Since you have to remove the back half of the bike to change two little seals, I did a 20,000 mile service of the swing arm bearings, rear shock, chain, sprockets, etc.
  17. Dutchgit

    Dutchgit Completely clogless

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    There was a guy doing Africa (IIRC) and his started weeping half way or some such. He kept the coolant topped up and in the end rode home like that (Germany)
    It's like a slow leak on a tube. You could keep it going for thousands of miles until you need a new tyre and safe the hassle of fitting one before you need to.
  18. opm22

    opm22 n00b

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    theoretically there is a small chance of oil contamination, but you probably would see oil weeping from the same place. Maybe the worse that could happen would be the weeping getting really bad in a long trip. You should change the water pump shaft (BMW #11512343451 or #11517700414, it's the same from the GS). It's a set that comes with two seals - one for the water side and another for the oil side.

    It is suppose to be a simple job but you will have to "move the frame away" of one of the bolts of the clutch case.

    I had mine changed at around 35.000 km ( ~22 k miles). It's a known problem of these bikes, the axle from the water pump gets some groove wears at the seal.
    Ref.: http://faq.f650.com/FAQs/Water_Pump_Seal_Repair_FAQ.htm

    D038EE9C-4A3E-4980-A082-6985D3B467AF.jpg
  19. cgguy09

    cgguy09 Scientiæ Cedit Mare

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    So, I was having trouble with some rough idle on the bike. I found the problem. But I can't explain it...It was the spark plugs.
    As far as I can tell, the part fiche recommends the same two spark plugs for both the primary and secondary spark. When I switch the spark plugs (not the coils mind you) it alters how the bike runs. Both spark plugs have a bright blue arc when I tested them and both are in good shape (<6.5k miles).

    Are they two different spark plugs & I'm missing something...or ... or ... am I missing something.:asshat
  20. eaglescan

    eaglescan Borrego rocks

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    They are both the same plug , but you may have a dud. Only way to find out is buy 2 new ones. I use NGK DR8EB , got them at auto parts store, very reasonable price.
    cgguy09 likes this.