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  1. #351
    ballbuster
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    Quote Originally Posted by pcmark View Post
    One of the manuals I saw online recommended Golden Spectro 85/150 (2.5 WT) Fork Fluid.
    Depends on your weight. My new (to me) Lefty Max PBR... I thought the damper was broken, but the lockout worked just fine. Turns out somebody put some mega thin damper oil in there. I changed it out with some 5wt Motul motorcycle fork oil, and now it feels great. I think I could even go 7.5wt. I'm 210 pounds, and like a fast fork (but it was way too fast when I got it). I tend to lean towards the quick rebound side of things, but not so much I bounce off the trail into the bushes after landing a small jump.

  2. #352
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    Hey guys do you know what wrench (name and size) is required to unscrew the part number 13 (lower collar assy) from a Lefty Hybrid XLR 90 2013 ?
    Thank you !
    Attached Thumbnails Attached Thumbnails The official Lefty thread, tech, mechanical, etc-lefty.png  


  3. #353
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    Quote Originally Posted by muntos View Post
    Hey guys do you know what wrench (name and size) is required to unscrew the part number 13 (lower collar assy) from a Lefty Hybrid XLR 90 2013 ?
    Thank you !
    Hi, I've used a normal 40mm wrench

  4. #354
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    Re: The official Lefty thread, tech, mechanical, etc

    Quote Originally Posted by d.zucconi View Post
    Hi, I've used a normal 40mm wrench
    Thanks!

    Sent from my GT-I9505 using Tapatalk 4

  5. #355
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    OK, so I have a large 2013 F29 with the PBR fork that I bought new and haven't had apart. I recently noticed that my stem spacers were slightly loose and there was a creak in the stem, so I removed the steerer assembly. Inside on the end of the steerer were three black spacers and a red spacer with a beveled edge.

    Are all four of those spacers supposed to be there? I looked at schematics and don't see them. I put the bike back together and tightened everything up to spec and there is still a little looseness to the stem spacers, which I think is due to those other spacers on the steerer. Is it safe to remove one or two of those internal spacers (which I suspect would allow me to get my stem nice and tight)?

    Thanks!

  6. #356
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    You have the MK2 (revised and supposed better) version of the steerer, the inside spacers must match the number of the outside spacers (the red inside one is mandatory, doesn't count). Take a look here for the schematics and additional info : V2 OPI Steerer

    Sent from my GT-I9505 using Tapatalk 4

  7. #357
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    Quote Originally Posted by muntos View Post
    You have the MK2 (revised and supposed better) version of the steerer, the inside spacers must match the number of the outside spacers (the red inside one is mandatory, doesn't count). Take a look here for the schematics and additional info : V2 OPI Steerer

    Sent from my GT-I9505 using Tapatalk 4
    Wow, thanks. I didn't know that (and I appreciate the heads-up!)

  8. #358
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    Hi Everyone

    just a quick question I have just replaced my the top collar (part no kh 101) on my lefty and I have noticed that there are three orings that are to be fitted into the collar. there are two large orings and one smaller one I have managed to work out that the smaller of the three orings fits into the recess at the top of the collar (will be located between the rebound adjuster and the top caller) but I am not sure where the two larger orings go. I would be very grateful if anyone could advise me where the two large orings go.

  9. #359
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    The official Lefty thread, tech, mechanical, etc

    Arghhhh - is there a secret to threading in the steerer tube from under the headset into the OPI stem on a Lefty F-29. I can't get the male threads in the steerer to make purchase with the female end of the stem. If I pull the stem off, I'm looking down the the head tube at the top of the steerer tube, so it seems like should thread right up. Any help appreciated.


  10. #360
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    The official Lefty thread, tech, mechanical, etc

    Ok - got it. Apparently the trick is to lube the OD of the base of the OPI stem so that it slips through the upper headset bearing far enough to grab the male threads on the steerer.

  11. #361
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    Is it possibile to convert a 29er Lefty Supermax into a 650b one with added travel?

  12. #362
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    Quick question: What's a good estimate for the Axle to Crown measurement on a 2013 XLR 100mm 29er Lefty?

  13. #363
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    Lefty clamp bolts and brake caliper mount bolts

    What are the sizes of theses bolts. I would like to replace them by titanium bolts
    Thanks

  14. #364
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    I just picked a 2014 scalpel 4 , I let all the air out of the lefty fork and now when I put air on it it seems to loose it within a few hours, anyone had this issue ?

  15. #365
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    Quote Originally Posted by Anders View Post
    ssuats, I just received my fork and put the spacer in position 1, as you indicated in post #207. Just one comment though. The travel reduction spacer is about 0.5mm larger in diameter than the upper air seal and you need to file it down or it won't go down the lower leg. It's a one minute job. Besides this it went as smooth as expected, though the locktite on the damper was very hard to break free. You need a lot of force to get it loose and be very carefull that the castle tool doesn't slip out of the damper interface or you will be in trouble. My fork was originally 490mm A-C now it's 480mm and you can definitely feel the different in steering, but I don't notice any change in suspension feel at least on tarmac.

    EDIT!

    I just realized that placing the spacer in the position indicated above will cause the spacer to move on the damper shaft when the fork is compressing which might cause wear on the surface in the long run. I have revised the placement to now be between the lower bottom out bumper and the lower air seal. The spacer should not move when place in this position.


    it's crazy how people manage to mess up everything with the only justification to DIY ... that clip in spacer is only used under the top cap, in the position showed in the picture will cause the malfunction of the soloair system...

  16. #366
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    2013 Lefty Hybrid PBR stuck in "locked" mode

    Hi All,

    I have a 2013 Scalpel 29er with a Lefty Hybrid PBR.

    Yesterday, when riding I had locked the fork and I was unable to unlock it afterwards.

    I noticed that the red compression knob became very hard to push in and even after applying significant force the knob would still "pop up" and the fork remain locked.

    After riding I decided to try to troubleshoot the issue further and here's what I found:

    • After multiple attempts to unlock the fork, I managed to get the red knob pressed down and unlock the fork but that required a amount of force that I had never used before. Now, locking the fork again by pressing the blue button causes the red knob to pop up so quickly that it actually hurt your finger if you keep over it. It seems that there is some kind of load in that mechanism that prevents it to easily move up and down;
    • I tough that this could be related with bearing migration, and I had reset it but it did not help.
    • I also unscrew the top cap of the fork (the one that you unscrew w/ a hollowtech tool) to look for anything loose or broken and did not noticed anything unusual.
    • I also noticed that removing all the pressure from the fork doesn't cause it to compress as if something is causing it to stay stuck. It doesn't look to be bearings as with the top cap removed, the fork will compress all the way down.
    • Any suggestions of what could be the issue? Also, does anyone has a detailed dissamble procedure for this fork?


    Regards,
    Ricardo

  17. #367
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    I have a 2015 scalpel team, this is my first cannondale. Is it normal to have run lower air pressure than normal forks require, and way below the recommended setting form cannondale? I am running 55psi and the recommended pressure is 87lbs I weigh 145lbs. I like a fast rebounding plush fork-not really loving the lefty right now.

  18. #368
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    Quote Originally Posted by Joshua_B View Post
    I have a 2015 scalpel team, this is my first cannondale. Is it normal to have run lower air pressure than normal forks require, and way below the recommended setting form cannondale? I am running 55psi and the recommended pressure is 87lbs I weigh 145lbs. I like a fast rebounding plush fork-not really loving the lefty right now.
    55psi seems low for your weight. 145lbs is approximately 65kg, so recommended pressure per chart is 109psi. I'm around 230lbs or 104kg, recommended is 180psi. I've also used this calc: body weight x .75 = psi. So, 230lbs x .75 = 172.5psi. I've found that 170-175psi works best for me. As for rebound, after turning knob fully CW, 5 clicks out CCW.
    2014 Niner SIR 9 SS
    2014 Cannondale F29 Carbon 3
    2008 Cannondale Prophet 4, Lefty Max TPC

  19. #369
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    The official Lefty thread, tech, mechanical, etc

    Ricardo - similar happened to me on my 2013 F-29 back in the Summer. I sent the fork to Mendon Cyclesmith for servicing and it's worked fine since.

  20. #370
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    Hi,
    I'm from belgium and I'm looking for some help.
    To resume I would like to make the full (oil - needle bearing change - o-ring...)maintenance of my lefty speed carbon sl with DLR myself.
    Does somebody have a link with tutorial maintenance? Technical manual?Pictures?
    Sorry for my bad English and thanks in advance for your help

  21. #371
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    2008 Headshok DL Internals

    So I recently fudged my way through a complete rebuild and air sleeve upgrade of my 2008 Headshok Super Fatty DL. I relied heavily on hints from this thread and others on the forum, so thanks to all of you!

    I saw many kinds of dampers from leftys and headshoks, but none were quite like mine. While I had the damper in pieces I thought I'd take a snap (and label it with my made-up part names!) so that someone else might benefit. This is a DL type (no rebound adjust), which is different to most that I saw which were DLR's.

    A quick caveat - I was assisted by a mech engineer buddy who made all the necessary tools on his mill - without this I would have been screwed. We made a pin spanner for the forks top cap, a cross spanner to remove the damper from the fork, another pin spanner for the damper caps, shaft clamps to hold the shaft and a bullet tool for reinstalling the damper cap seals. There's not really a satisfactory way to do this job if you don't have the right tools, so either cough up for the genuine items or find yourself a mill-monkey!

    My picture shows the shaft disassembled, but when you first get the shafts free of the damper cartridge the top cap of the damper (white) and the thick o-ring bump-stop (black) are trapped on the upper shaft between the damper valve (blue) and the 'fork top cap'. It took a lot of chin scratching to work up the courage to put the thing in a lathe (used as a 'press') and pull the top nut and top cap off their respective shafts. As it turns out they're pressed on relatively lightly - but I still don't think I'd attempt it without some kind of tool that will pull axially and I definitely wouldn't do it without proper shaft clamps.

    Once it's apart you can see the simple operation of the lock-out lever. When fully assembled the lockout nut is pressed onto the top of the lower shaft. Midway down the lower shaft is the lower portion of the damper valve which houses a kind of slotted washer. By rotating the nut with the lockout lever the whole lower shaft rotates relative to the upper shaft which realigns the ports of the damper valve - either opening or closing the valve. Very simple. Make sure the slotted washer is oriented correctly in it's housing or else your lockout lever will operate backwards or not at all.

    The official Lefty thread, tech, mechanical, etc-imag1205_.jpg

    Cheers,

    Steve

  22. #372
    FIRENZE rulez !!
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    a question :

    i am planning a special built ...

    can i remove all the internals from a Lefty ?

    which material can insert inside the fork to have a 40cm ( around ) distance axle-to-crown ? a delrin tube ? a pvc tube ?

    which weight can be at end of transformation ?

    and what about the top cap ? must be closed, without lockout and very strong to survive to all the hit of the road ...

  23. #373
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    Can anyone explain to me how to reset the bearings of a 2013 Lefty XLR Carbon?

  24. #374
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    Quote Originally Posted by Five Miles Out View Post
    Can anyone explain to me how to reset the bearings of a 2013 Lefty XLR Carbon?
    If your pressure is low enough that it bottoms out periodically during rides, it will handle most of those duties all by itself.

    Good to still do a manual reset once in a while anyway though.

    Remove the top collar using an external bearing bottom bracket tool, and remove the split rings from the top end piece.

    Grab the bars, and forcibly cycle the fork downward a few times. Put the split rings back on, reassemble.

    Do be very careful re-mating the XLR with the top end, as you are screwing the collar back into place, be rotating the rebound knob, so you can feel it key, and drop into place. When you feel the clicks of the rebound knob working, it's keyed.
    This is a Pugs not some carbon wannabee pretzel wagon!!

    - FrostyStruthers



    www.mendoncyclesmith.com

  25. #375
    Formerly of Kent
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    The official Lefty thread, tech, mechanical, etc

    Does anyone know the distance/length, from axle to top of the top crown, of the Lefty 2.0 in size SMALL that is coming on the F-Si?

    I'm trying to figure out the height of the handlebars as they compare to my current bike with standard fork. Don't want to ask my local dealer to order a very expensive bike if it won't fit me.


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