XR650L: Spud's Oil Cooler

Discussion in 'Thumpers' started by Spud Rider, Apr 14, 2012.

  1. ThumpnRed

    ThumpnRed Pig Wrangler

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    It's easy to see if it will hit. Pull the top caps off the forks and push the wheel up. I am not convinced that it will hit.
    #21
  2. techforlife

    techforlife CDI REPAIR

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    I`m just concerned that if you hit the brake hard while in a dip in the road that the tire may contact the fender or cooler and launch your butt over the bars when the tire stops turning........so don`t be posting pics of you squished against tree....don`t wanna see you get hurt bud:lol3

    Otherwise it looks sturdy enough..but i`d paint the hose clamps black,,it`d blend in better,,the ones Mark provided were black,,not as noticeable...


    B
    #22
  3. Spud Rider

    Spud Rider Long timer

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    I hope I didn't sound defensive; that was not my intention. I appreciate you feedback, and your concern, Brian. :nod I might do as Red suggested, and pop the caps off the forks as an experiment.

    Incidentally, I agree with you regarding the Sutton oil cooler. Mark's oil cooler is not only very functional, it is a work of art. Mark's oil cooler is also, obviously, a labor of love. I doubt Mark makes more than $0.25/hour fabricating all the parts for his excellent oil cooler. :nod

    Spud :beer
    #23
  4. Spud Rider

    Spud Rider Long timer

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    I haven't had any overheating problems yet, PD. I'm trying to prevent problems. :nod I can tell the oil gets mighty hot inside these engines, and I decided adding an oil cooler was a good idea, since I removed the stock air scoops when I installed my aftermarket fuel tank. Also, I wanted to be able to monitor the oil temperature with the digital, TTO temperature gauge. Now, if the oil temperature rises too high, I can at least back off the power, or stop the engine until it cools down. :deal

    Removing the spark plug is not any more difficult after installing my oil cooler. My oil hoses are all routed away from the spark plug, so they do not hinder access to it.

    Spud :beer
    #24
  5. Spud Rider

    Spud Rider Long timer

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    Thank you, Christian.

    The oil hoses are located behind the forks, and well inside the outside edge of the fuel tank. In fact, the oil lines are located just about even with the edge of the engine cylinder. Therefore, I think the hoses are well protected. However, I will report any problems I might encounter.

    Spud :beer
    #25
  6. Spud Rider

    Spud Rider Long timer

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    Thanks for the tip, Red. :nod I haven't changed my fork oil yet. How difficult would it be to get the caps back on if I made a quick check in this manner?

    A while back someone posted a photograph of his bike with the forks fully compressed after a jump. One can't always tell from photographs, but it sure looked as if the wheel would hit my oil cooler in a similar situation.

    Spud :wave
    #26
  7. beechum1

    beechum1 Dandole Gas al Burro

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    258degF AFTER the oil cooler?? (looking at the pics) that doesn't sound right....
    #27
  8. Spud Rider

    Spud Rider Long timer

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    Yes, at the end of 26-mile, full throttle run on the freeway, my oil temperature slowly rose to 258 degrees. I backed off the throttle to 65 mph, and the oil temperatures kept dropping for 3 miles. Then I turned off my exit, and the freeway experiment was over.

    Please note, I intentionally installed my temperature probe in the oil line closest to the engine, before the oil enters my oil cooler.

    [​IMG]

    I placed the probe in this location in order to get a reading as close as possible to the temperature of the oil inside the engine. In contrast, the XRs Only temperature gauge is located in the oil reservoir, which probably contains the coolest oil in the system.

    If someone will loan me an XRs Only temperature gauge, I will be glad to compare the temperatures simultaneously, at both locations. I would return the XRs Only temperature gauge after a few days of experimentation. :nod

    Spud :wave
    #28
  9. Spud Rider

    Spud Rider Long timer

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    As I said earlier, I suspect the front wheel might hit the oil cooler with full compression of the forks. This is a valid concern, so I want to provide some additional information. I have installed a lowering link, and raised my forks 1-inch in the triple tree. I don't know how much free sag I have with my current forks. The doctored photograph below shows approximately how much the front wheel can travel before it impacts the oil cooler on my lowered motorcycle.

    [​IMG]

    I think I can raise the oil cooler about an inch, if necessary. I can also trim the rear of the fender so the wheel will not grab it long before it would impact the fender. When I get a chance, I will lift the front wheel and see how much free sag I have in my forks. :deal

    Spud :beer
    #29
  10. KyoXR

    KyoXR Clouds, Snow, Rain

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    Good job Spud!

    we need more fabricators out there doing stuff like this!

    don't let the nay-Sayers get you down,(from reading several different forums)

    also on a side note,I keep reading about how bad it would be if you got mud on your cooler (from several different forums)...um...the oil will still be cooler then without a oil cooler...to think that somehow getting mud on your oil cooler will make it hotter then running no cooler at all just doesn't make sense.
    #30
  11. techforlife

    techforlife CDI REPAIR

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    Nope,,didn`t sound defensive at all Spud,all good here boss....yup..Red has a good suggestion..pull the caps,,it`ll drop like a stone,,then you`ll know for sure..:deal


    B
    #31
  12. techforlife

    techforlife CDI REPAIR

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    You need to put the bike on a lift of some type....or hang it off a beam in a garage...loosen the caps right off.drop the bike......then all you do is lift the bike back up and screw the caps back on........if you take all weight off the front wheel so it just lifts off the ground there is no spring pressure...:deal

    B
    #32
  13. LexLeroy

    LexLeroy Mr. Spoil Sport

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    Good job Spud. What may be the same cooler, mounted a bit differently and plenty filthy, indicated 240 degree oil in the tank during a 1 1/2 hr. trip home on pavement from the Daniel Boone N.F. Road speed was 65 - 70 mph, ambient air temp was about 75 degrees and the bike is geared 14/45.

    [​IMG]

    Don't sweat a little bit of mud.
    #33
  14. Spud Rider

    Spud Rider Long timer

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    Thank you, Kyo. :D

    Spud :wave
    #34
  15. Spud Rider

    Spud Rider Long timer

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    That's what I figured, Brian. I just wanted to make sure. :nod I've been told it's difficult to get the caps back on some forks, and I didn't want to get surprised by my XR650L forks. :deal

    Spud :beer
    #35
  16. Spud Rider

    Spud Rider Long timer

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    Thank you, Leroy. :D Indeed, I'm not worried about a little mud. I figure the higher I place the oil cooler, the less mud it will accumulate. :nod

    My oil cooler is the same as yours, except it's a little smaller. My oil cooler is the 4"X4" version; your oil cooler is the 4"X6" version. :deal

    Spud :wave
    #36
  17. ER70S-2

    ER70S-2 Long timer

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    Spud:
    I was just stumbling around Thumpers and found your oil cooler project. I agree with Kyo, a good project, and very good pics to show what you're doing. Figure something out, build it, take notes, make improvements if they become necessary, ride. It's projects like this that got man on the moon and robots on Mars. :thumb

    I had an oil temp gauge in the drain plug (yep, bad location, but a first try) and saw 275* on a slow, hot jeep road. It's also where the oil is hottest; like your choice, before the cooler. But that's why I run full synthetic (Mobil 1 automotive, 15-50). If Suzuki is happy with15-50 dino oil in the DR650, I'm more happy with synthetic. It's my safety factor. And I'm sure that's a whole bucket load cooler than what the NASCAR engines are running. The DR has 2.5 qt capacity, another comfort to me.

    Anyway, my suggestion: add another alum strap as high as possible, under the frame tube (red arrow). Even though the cable tie will dampen vibration, it's a weak spot. Keep up the experimenting and I'll tell NASA to look for you here. :beer

    Ok, I'm goin' back to the DR650 thread, before I get stoned by Honda riders. :zilla :D

    [​IMG]
    #37
  18. Spud Rider

    Spud Rider Long timer

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    If the fork caps are removed, the uncompressed springs can extend out the top of the fork tubes, allowing the wheel to rise. However, won't the wheel rise farther than normal without compression of the fork springs? :dunno

    Spud :wave
    #38
  19. Spud Rider

    Spud Rider Long timer

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    Here's a photograph of an XR650L with the suspension bottomed out. :eek1

    [​IMG]

    However, the rider, forum member Memnok, has USD forks on his XR650L. :deal

    I'm starting to think Red is correct; my oil cooler might not get hit by the tire when the stock forks are fully compressed. :nod I really like the present location of my oil cooler. If necessary, I am willing to limit fork travel. :deal

    USD forks bottom out when the outer fork tube contacts the base of the inner fork tube near the front wheel. Do conventional forks bottom out when the outer fork tube contacts the lower triple tree?

    Spud :beer
    #39
  20. elsalvadorklr

    elsalvadorklr southern xr rider

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    spud Im not sure but im pretty sure in the pic of memnok bike, that the outer tube is defintely NOT touching the clamp base of the inner slider where the wheel axle passes

    its internally on BOTH styles of forks that you bottom out, spring and cartridge wise

    but Im willing to learn more on this scenario, id love to hear some more input from the pro's!

    cheers

    I was going to post this pic on here saw it posted again on the xrl thread but you got it!

    cheers
    #40