How To Crack A Master No. 8119D Cable Combination Lock

I had no idea how to crack this lock but i tried about 10 different techniques and found only one that worked.
Video Rating: 4 / 5

master bike lock
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master bike lock
Image by russteaches
I removed my Blackburn rear rack and Origin8 Classique Sport saddle bag (think Carradice on the cheap) and replaced it with a water-resistant Outdoor Research gear bag I had laying around.

To install this setup I removed the seatpost and slid it through the loop at the bottom of the bag. I attached it to the Brooks B-17 Champion Special saddle with 2 toe straps from an unused set of pedals. The second toe strap is a bit redundant here, but I’ll need it if I decide to fill the bag with more stuff.

The whole setup weighs less than 3 ounces. It’s hardly what I’d call an elegant solution but let’s face it, the Rock Combo is hardly an elegant bike.

There IS less space in this setup but he bag fits a bunch in a small, rattle-free package. Random bits rattling around the Origin8 saddlebag is the reason for this modification anyway.

What I’m carrying now:
-2 spare tubes
-1 tire lever
-Park Tool patch kit
-Nashbar Allen wrench set
-Park Tool spoke tensioner
-4 zip ties
-1 large Zip Lock bag
-Alien multi tool
-1 bandanna (wraps all the tools nicely)
-2 latex gloves
-Tweezers (to remove the annoying bits that always get stuck in my tires on Detroit’s roads)
-Spare set of cables
-Spare master link

What there’s still room for if I unroll the rest of the gear bag:
-Cable lock
-Treats/energy bars/trail mix
-Arm warmers or a reflective sash

Using this setup, I’d probably roll up and lash a windbreaker to the bottom…or maybe attach it to the saddle loops using velcro straps?

Total cost: .00. Total weight savings: about 3 1/2 pounds.

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27 thoughts on “How To Crack A Master No. 8119D Cable Combination Lock

  1. I just bought a 8119DPF and it appears this doesn’t work. I can’t feel
    anything different when I hit the right number. Maybe I’m just doing it

  2. Thanks bro!!!!!!
    I open my grandfather lock and he said who ever open the lock he will give
    a 100$ and I open it thanks a lot!!!

  3. IT WORKED! Got a bike at a yard sale and she threw the lock in, saying I
    dont remember the code. But your technique worked and saved the day! It
    was hard to keep pulling it out while spinning it, but you could have
    someone else hold it for you. Amazing!

  4. Thanks for the info – I just picked a very similar OnGuard brand lock. I
    tried to feel the slop in the dial and also watched the gap on the right
    side to see if it got slightly wider.

  5. yo dawg nice shit u got there. my coat got jacked from my locker a few days
    ago n i had one of those masterlock locks. im just tryin to figure out how
    people open a lock without braking it. i hope your video wont be used for
    stealing! good job. much peace from canada

  6. lmao looking at the coments, iluvgtasan , this is why people only show
    their hand on clips. lol I’ve seen more trix in a hobo’s arm pit

  7. omg!!!! lmao i found one of those locks and i didnt know the combo to it so
    i wnet through number by number 0001-9999 but i only got to like 3500 and
    gave up so i twisted the numbers around cuz i got mad and it poped open =D

  8. 41 of 43 people found the following review helpful
    4.0 out of 5 stars
    It does the job!, June 17, 2009
    C. Padovan (Boston, MA USA) –

    This review is from: Master Lock 8143D Self Coiling Cable Lock, 4-Feet x 5/16-inch (Tools & Hardware)
    It is cheap but does the job! I usually leave my bike inside a private bike gate at work, so I use the cable just to discourage anyone who intends to steal. I do not recommend this cable if you want to lock your bike in a large tree, for example, since it is 4-feet long (aprox. 1m) and the coil is very resistant to be unfolded. Also, I do not recommend it for leaving your bike outside during the night since the locker by itself (the part with the code number) seems fragile enough to be broken with tools. Finally, the cable comes with the code, so if you forget it, you will not be able to change it for an easier one.


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  9. 24 of 25 people found the following review helpful
    5.0 out of 5 stars
    Cheap, Good, but take caution, August 31, 2012
    Verified Purchase(What’s this?)
    This review is from: Master Lock 8143D Self Coiling Cable Lock, 4-Feet x 5/16-inch (Tools & Hardware)
    Product is of good quality, compact and easy to use. there will be a aluminum tag with 4 digits on it that will be your combination. YOU CANNOT SET YOUR OWN COMBINATION, which I am fine with. I would not recommend this lock for anyone would has to leave his/her bike outside for an extended period of time (couple of hours), because it is quite thin (comparable to a well made ethernet cable), so it’s very easy to cut. I have an office so my bike usually sits there.

    verdit: economical, compact, very good for only 5 bucks. do not recommend if you have to leave your bike out for a long time.


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  10. [] Thanks, Josh. It works for now; we’ll see if how durable/useful it is in the long run!

  11. [] Good eye, but are you kidding me? Do you think the spousal unit would actually allow Browning in the kitchen?

    I can see why you’d think that though; these are old kitchen cabinets re-purposed for tool storage in the basement workshop. Otherwise known as my lair.

  12. What did you think of the Origin8 Carradice knockoff? I picked up a used one for real cheap over the summer, but it’s been on a bike I barely use (which I guess is the appropriate place for a Carradice knockoff?)

  13. [] Thanks for stopping by my stream! Having never owned a Carradice, I’ll say the Origin8 is a fine bag, and allows me to stow away everything I need for a 2-3 day ride. However, grown-up responsibilities don’t allow me to take multi-day trips often, and the bag often leaves me with too much space, allowing the stuff I take with me rattling around its cavernous opening. That can get annoying on longer rides.

    I’m not a weight weenie (I could skip a meal or three if I really wanted to shave some weight) but I am a minimalist when it comes to extraneous stuff hanging off my bike. The solution I’ve posted here allows me to take only what I need in a compact, cheap and light package that keeps it safe and dry.

    I’m not ready to give the Origin8 up though; I truly believe it has its merits and I’ll use it for the bicycle camping and touring purposes for which it excels. I just don’t see it having a purpose hanging from my saddle every day of the week.

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