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Thread: Okay.. What did I do wrong ?

  1. #1
    Senior Member
    Bike: 2012 Honda NC700X
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    Okay.. What did I do wrong ?

    Changing out the chain and front and rear sprockets today...

    Removed rear sprocket, called dealer to get torque specs on rear sprocket nuts from the maintenance manual. He called back and said 80 foot lbs.... No problem.

    Set torque on 3/5 nuts to 80 foot lbs (with torque wrench), but 2/5 nuts now spin on the studs and won't hold torque... what gives ?

    Thanks for the help here guys.

    Will

  2. #2
    wideguy
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    80 ft lbs is far to much for those fasteners. 35-40 is in the right range.

    If you can prove your dealer told you 80, get a good lawyer and sue them for the problems they caused you.

    If you can't prove it, suck it up and try to be better informed in the future.

  3. #3
    Senior Member Krampus's Avatar
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    Quote Originally Posted by wideguy View Post
    80 ft lbs is far to much for those fasteners. 35-40 is in the right range.


    No guessing necessary.

    Unfortunately, driven sprocket torque is listed in the manual as 80 Ft-lb.
    I have a couple few other manuals from previous machines to compare to: example: 86 VFR 58-72 Ft-lb (call it 60-70).
    Does seem high.
    Last edited by Krampus; 13th April 2017 at 15:50.

  4. #4
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    Okay.. What did I do wrong ?

    On the service manual 18-9, it does indicate 80 lbs•ft for those nut.

    Hope your able to find a way to get it fixed...

    Sent from my iPhone using Tapatalk

    2014 Red NC700X - Givi FZ1111, Shad Comfort Seat, Moose Racing 47L Expedition Trunk, Barkbuster Storm, Adjustable levers, Denali Light Bracket, generic LED driving lights

  5. #5
    Senior Member OneGun's Avatar
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    When I look at the size of those studs/nuts, my instinct says that 80 ft. lbs. is a bit high, but it doesn't seem ridiculous. I'm guessing 2 of the studs were inherently weakened by either poor assembly/materials and you did nothing wrong. If you bought the bike new from the dealer you spoke with, it might be worth giving them a call and letting them know what happened.

  6. #6
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    Has your wrench been dropped, has it been calibrated recently? Does it have lb·ft and Nm scales?

  7. #7
    Senior Member
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    You think I made it up? Why would I go to the trouble, they called me back because they took the time to look it up in the manual. The torque was easily that high, took hogging on a 1/2" breaker bar to break them loose. I put a genuine request for help and advice, clearly this response of yours is neither of those.

  8. #8
    Senior Member
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    Okay... Seems clear to me that they may have been over-tightened, now why only 2/5 were over tightened and the other 3 held I don't understand, but whatever.

    Could the TQ wrench be out of cal? Sure, it's not an expensive wrench, it's possible.

    But beyond all of this advice about how a problem occurred, what I could really use is some advice from so many of you guys who know more about bike maintenance than I on how to fix it.

    Thanks friends.

  9. #9
    Senior Member Krampus's Avatar
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    May be confusing with another machine I've had, but Ponyperformance8 can confirm: do the studs have the allen heads on the back of them (inside side of the hub; screw in from the back)? May have been the Aprilia, but if it does you can still torque the nut even if the threads are stripped (i'm assuming the stud stripped the sprocket carrier/hub; or is the nut stripped?). If the studs simply screw in from the outside, you'll have to come up with a repair or replace the hub (hub may not be the correct term).
    Last edited by Krampus; 14th April 2017 at 09:24.

  10. #10
    Senior Member Okay.. What did I do wrong ? dduelin's Avatar
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    Sometimes things just go south and it's nothing you've done wrong. If the wrench was calibrated and the threads were dry the nuts should take 80 ft/lbs.
    Dave

    ST1300
    NC700XD
    CH80



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