Show us your TransAlp modifications!

Discussion in 'Land of the Rising Sun: ADV Bikes from Japan' started by modrover, Apr 13, 2004.

  1. 2old2Bbold

    2old2Bbold was 2bold2getold

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    Do any of you California guys need this smog stuff. I hate to throw it in the trash if anyone needs it.

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  2. Ladder106

    Ladder106 It's a short cut, really

    Joined:
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    Location:
    Davis, CA
    Jordan,

    The TA looks much straighter than it did 2 years ago.

    Nice photos
  3. dualdogdave

    dualdogdave Twin Power Rules!

    Joined:
    Jan 18, 2007
    Oddometer:
    148
    Location:
    Santa Cruz Mountians
    The TransHawk has been in storage and I'm just getting around to putting her back on the trail.

    As I was stopped waiting for the left turn light about to hit the freeway ramp I Iet out on the clutch and heard sort of a clunk
    and noticed the oil presure light was on. I aborted the freeway ramp and drove it gently back home about 5 blocks away.


    [​IMG]



    Back in the garage I put here on the lift for a visual inspection.

    Plenty of oil on the dipstick

    No metal in the oil

    I pulled the sending unit and hooked up a cheap mechanical oil guage.

    After considerable cranking of the starter I never saw the oil guage move off of ZERO.








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    So I'm going to roll her to the side and contemplate the problem for awhile. :cry


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  4. 2old2Bbold

    2old2Bbold was 2bold2getold

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    The only oil pump failure I've seen was caused by a little piece of debris that got sucked up in the pump gears and locked it up solid. Someone had screwed up the little filter screen on the pump pick up tube so it was just a matter of time. Does the Hawk motor have a oil pump drive chain behind the clutch like the TA ?
  5. Backonthebike

    Backonthebike Giddy up

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  6. Ladder106

    Ladder106 It's a short cut, really

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    If I had a garage like that, it would have a bunk and a refrigerator. Then I'd only leave it to ride.

    Good catch on the oil pressure.

    I'm thinking that pulling the right side cover and looking at the oil pump drive chain would be pretty easy.

    Let us know what you find.

    Whatever it is, you certainly have the facility to fix it.
  7. dualdogdave

    dualdogdave Twin Power Rules!

    Joined:
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    Oddometer:
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    Location:
    Santa Cruz Mountians
    Thanks Guys for the props !

    I have been noodling the problem reviewing my Honda Manual.

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    A look under the clutch cover should be very informative.

    I have a spare set of clutch plates while I'm in there.

    I'm just getting moved back into the garage after the remodel
    This will be a good project to break in my new work space.

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  8. dualdogdave

    dualdogdave Twin Power Rules!

    Joined:
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    Oddometer:
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    Santa Cruz Mountians
    Today I went exploratory on the TransHawk oil pressure issue.



    [​IMG]


    It wasn't long before I got to the trouble............


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    I immediately noticed the slack in the chain..........

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    Then noticed fragments from the chain like pins and links.........


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    Then I pulled the clutch basket..........


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    Now the problem is obvious.......


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    The oil pump drive chain completely jumped off of the sprocket behind the clutch basket,,,,,,,,


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    I feel rather lucky...........





    So what caused this ???????????????????????



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    This could have been catastrophic!!!!!!!!!!!!!








    I will have to pull the oil pump still and make sure there is no more shrapnel in the sump.


    [​IMG]


    Stay tuned.................

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  9. Backonthebike

    Backonthebike Giddy up

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    Oh, I'm sorry Dave. Leather lounges, flat screen TV, designer Samsung brand floor mats??? Does your significant other know what you are doing in the house?
  10. Ladder106

    Ladder106 It's a short cut, really

    Joined:
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    I know,

    You could just sleep on the leather sofa.

    Haven't seen the refrigerator yet.

    Microwave for nachos?

    Very nice indeed, Dave.

    It looks at though a worn/slack oil pump drive chain was the problem. If you've ever had your mountainbike chain suck up into the frame chainstays while shifting to the small sprocket under load.....it's the same thing.

    Chain jams and gets blown apart by the inertia of the engine.

    As long as you can account for all the sideplates and rivets, you should be OK. Doesn't look like it made tiny metal shavings anywhere.

    At least this makes me feel better about replacing the oil pump chain every time I replace a clutch in the TA.
  11. mas335

    mas335 xendurist

    Joined:
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    Piedmont region NC
    Dave,

    How many miles are on this engine? Given how these chains are made with multiple internal link plates I find it hard to believe that one could ever wear so much that it would jump off the sprocket.

    I know they fit fairly loose even when new and the sprocket teeth depth is not great but from a purely mechanical point of view I can't image this happening, especially since it is not under a huge load. Just thinking out loud on this one. Do you know if this engine case side has ever been off before you got the engine? I assume you replaced the pickups with TA pickups so it has at least been off once since you got it?

    I am also wondering if the Oil Orifice jet is turned backwards? On a Transalp the small diameter end faces outward and this one looks like it's reversed, the large port is facing outward. I got to admit I never had my two Hawk engines apart and I don't have a manual for one anymore so I don't know what the correct position is for the NT650 oil orifice.
  12. 2old2Bbold

    2old2Bbold was 2bold2getold

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    WOW, that could have been a lot worse !!! You could have been going 70mph down the highway. Maybe you could take the other side cover off, lay it on it's side and rense it out with something, Even a pressure washer would probably be ok, an air hose to dry it out, and then soak every thing in oil. Sure would make a mess, but you don't want to leave any bits in there. And then do a couple of oil changes. Just thinking out loud. Nice garage. You and DR E have got the right idea. :clap:clap:clap
  13. dualdogdave

    dualdogdave Twin Power Rules!

    Joined:
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    Oddometer:
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    Location:
    Santa Cruz Mountians
    .


    After sleeping on it, I took the next step, removing the oil pump sprocket.


    Down behind and under the oil pump sprocket was this !!!



    [​IMG]

    There had to be an answer.....

    The Hawk motor was built from a low mile NT.

    The TransHawk
    odometer shows only approx. 14 + K miles.

    Now the question is where did this mystery bolt come from ?

    It is a 5mm button head socket cap (not Honda) and it appears to have passed through the works, the way it is all mangled up.

    I have never had the case covers off.

    Best I can speculate is: during some oil change it fell in the dipstick filler hole by freak accident.

    Fortunately the chain is the only damaged part.

    The pump turns with what seems the proper resistance yet tight with no end-play on the pump shaft.

    Lets say that its all good,, and an opportunity to freshen up my oil pump drive chain and the old burnt smelling clutch pack.


    And yes, once finished, the garage will have a kitchenette
    .

    I have a little beer box meantime.


    ddd


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  14. Jim Rowley

    Jim Rowley Rise above

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    You need to change your name to Lucky Dog Dave. Go out and buy a lottery ticket.
  15. 2old2Bbold

    2old2Bbold was 2bold2getold

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    Lucky...yes. But if that bolt really dropped in through the oil filler hole, that seems pretty strange. Don't know if any of those were used in the motor but I'd sure be looking around for where it might have come from.
  16. Big Chris

    Big Chris Adventurer

    Joined:
    May 12, 2009
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    87
    I have an '04 650 TA, my forks dive a lot under braking, and when I hit the trails they have been known to bottom out with a disconcerting "clang" noise.

    The bike's done about 40,000 miles, I'm a lot taller than average and weigh 98kg, sometime I load my bike up with luggage.

    What have others doen to fix this problem in the past? Do I need fork springs? or do I need fork valves?

    If I'm taking my forks apart what else would you reccomend I do whilst theey're in pieces, I'll replace seals obviously, what else?
  17. Ladder106

    Ladder106 It's a short cut, really

    Joined:
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    Replace fork bushings.

    Respring for your weight and normal load. Local suspension shops can help here.

    Install Ricor Intiminators or Racetech emulators.

    Inspect, clean and relube steering head bearings.

    Then think about how bad the rear shock has become when compared to the front and start saving for nicer rear suspension.

    Good suspension really is the best money you can spend on your bike.
  18. thepoddo

    thepoddo Adventurer

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    Apr 2, 2012
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    Italy
    you can keep wasting your money on the stock forks or do what I did after trying everything, fit a complete new front pulled from a 2007 ktm sxf 250 (obviusly I changed the fork springs)
    best money I spent on my bike :norton

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  19. AlpineGuerrilla

    AlpineGuerrilla Been here awhile

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    Dec 3, 2010
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    Location:
    Basel, Switzerland
    Nice looking bike, thepoddo. I'm sure it handles like a dream. How did you get the rear to be so high? Would love to lift my bike up a bit more. :evil
  20. thepoddo

    thepoddo Adventurer

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    Apr 2, 2012
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    I reversed the suspension link and then I had a custom lower shock mounting bracket made by a machine shop (+2cm)
    now I can barely touch the ground :rofl