Unpacking and Assembling Your Diamondback BMX Bike
| 1. |
Begin by carefully cutting through the cardboard box with a box cutter. Please be aware of the sharp staples that may have been used to secure the box.
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| 2. |
Now remove all content from the box including the small parts box, bike and wheels (may all be attached). Before proceeding, be sure that all parts and material are now removed from the box.
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| 3. |
Now that your bike is out of the box, begin removing all of the packing material from the frame and detatching the wheel and handlebar by cutting all zipties that may be holding parts together. Be very careful not to cut any of the bikes brake cables while doing so.
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| 4. |
Loosen the seat clamp and insert the seatpost into the seat tube. If you have bike grease apply a small amount to the seatpost before inserting it. Finish by using a hex wrench to tighten. Make sure that you have inserted the seatpost past the minimum insertion line (printed or stamped on post near bottom). DO NOT OVERTIGHTEN.
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| 5. |
It’s now time to install your handlebar to the stem. Do so by removing the stem bolts and faceplate, placing the bar in the stem and re-secure the faceplate to the stem. Be sure that your cable routing is suitable and that there are no harsh bends or kinks in the cables.
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| 6. |
Once the handlebar is loosely placed in the stem, make sure that it is positioned symmetrically before tightening the faceplate bolts. When tightening the bolts, tighten them alternately and equally to ensure that the faceplate is equally tight on every side. The gap opening between the faceplate and the stem should be equal both on the top and on the bottom.
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| 7. |
If your bike has a Gyro follow these steps to install your Gyro cable and adjust your brake. If your bike comes with a straight cable, skip to step 10. First start with routing your upper gyro cable under the cross bar of the handle bar. Now note the cable length, one side will be longer than the other. The longest cable threads into top plate on the non-drive side of the stem. The shorter cable threads into the top plate on the drive side of the stem. Next, push cable narp (balled end of the cable) into the slotted portion of the rotor plate. Repeat this step on the opposing side. Refer to the gyro instructions included with the bike for proper adjustment.
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| 8. |
Now you can situate your bike in a comfortable working position. If you have a bike stand, that’s your best bet. If you do not have a stand you can flip your bike upside down resting on the seat and handlebars to finish your build.
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| 9. |
It’s now time to get your wheels ready for installation. Start by pulling the plastic protective caps off of the axle if there are any and identify the correct tread direction. If your tire is direction specific, it may be noted on the sidewall of the tire.
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| 10. |
You can now mount the front wheel on the fork. For this you’ll need either a 15mm wrench or 19mm wrench depending on the axle size. Slip the front axel into the fork dropouts. Make sure safety washers are installed property before tightening the front axel nuts.
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| 11. |
If your bike comes with pegs, you’ll want to install these before installing the axel nuts. You will need a 15mm or 19mm deep socket and extension. Make sure safety washer is installed properly on fork drop out before slipping peg onto axel. Slip the peg onto the axel. Insert axel nut into end of socket and thread by hand until axel nut is snug. Tighten down for safety. Repeat this step for the opposing side and rear peg assembly.
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| 12. |
Some bikes may arrive without a front or rear brake cable installed. Use the following steps if this applies to your bike.
Pull the break lever to the grip exposing the juncture where the cable enters the lever. Insert the cable narp (cable end) into lever and guide cable through the designated cable slot on handle. Then place end of cable housing into barrel adjuster.
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| 13. |
Your brake pads may need adjusting once brake is assembled. To do so, grasp brake pad with one hand and loosen brake pad bolt. Align pad to be parallel with rim surface and retighten brake bolt. You do not want the pad to come into contact with the tire.
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| 14. |
For pedal installation, we recommend applying a small amount of grease to each pedals thread before installing. Next, take the right pedal (this should be indicated by an R on the pedal which can be seen on the end of the spindle or on the axle depending on the pedal) and thread into the drive side crank arm. Tighten by turning your 15mm pedal wrench to the right.
For the non-drive side (or left facing forward on bike) pedal, turn left to tighten.
Do not force a pedal that will not thread on easily or you can cross thread the crank arm which will result in a damaged product.
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| 15. |
Now it’s time to inflate your tires. Each tire will have a manufacture’s recommended PSI on the sidewall. Please follow the recommended inflation setting.
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| 16. |
Last step is to go through the entire bike one more time to make sure that every bolt is tight, that your wheels are secured in place, that your front and rear brakes are functioning properly, that the handle bars are tight and don’t move when you hold the front wheel between your legs and twist them, and that your suspension has been adjusted to the proper recommended settings.
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*If for any reason, you do not have the proper tools or are not confident to build a bike yourself, we strongly suggest that you take your bike to a local bike shop for assistance or to have them assemble it. They may charge you a fee to do so.