Unboxing & Assembly Unboxing & Assembling the B57A Folding eBike Unfolding the frame, verifying the latch, fitting the stem and pedals, and folding it back down correctly. Applies to: B57A folding eBike Folding eBike B57A | Unboxing & Assembly — if the player does not load, open the video on YouTube. What you need Tool Notes 4 / 5 / 6 mm hex keys Usually supplied 15 mm spanner Pedals Torque wrench Recommended Allow 30–45 minutes. Steps Cut the carton open and lift the bike out with a second pair of hands — folding eBikes are awkward, not heavy. Open the frame hinge. Release the latch, swing the frame open until it stops. Verify the latch engages fully and the safety clip is closed. This is a load-bearing joint — test it by pushing down on the frame before you ride. Raise and clamp the stem. Fold the handlebar post up, close the clamp lever and confirm the tension is firm. If it moves under hand pressure, adjust the clamp screw. Fit the pedals. The left pedal is left-hand threaded — it tightens anticlockwise. Cross-threading here is the single most common assembly mistake; see Pedal Installation. Fit the seatpost to roughly hip height, then fine-tune once you can sit on the bike. Check the brakes and spin both wheels to confirm nothing rubs. Check tire pressure, then charge and power on. Folding it back down Reverse the process: loosen the stem clamp, fold the post down, then release the frame hinge and fold the two halves together. Route the cables so they are not trapped in the hinge. Watch out for Riding with the stem clamp loose — the most dangerous assembly error on any folding bike. A frame latch that closes but does not lock — if there is any rattle, stop and adjust before riding. Cross-threading a pedal — see Pedal Installation. Related Pedal Installation Pre-Ride Inspection eBikes Overview Tutorials Index Installing the D-Series Battery Side Guards A handed pair of panels that protect the pack — and a fitting order that stops you cracking them. Applies to: D-series How to install the left and right battery side guards for the CEMOTO D series? — if the player does not load, open the video on YouTube. What you need Tool Notes Hex keys Usually supplied with the guards Clean cloth Wipe the mounting surface first Steps Identify left and right. The two panels are handed and will not swap — test-fit before tightening anything. Clean the mounting points. Grit trapped behind a panel is what cracks them. Start every fastener by hand before tightening any of them. Fit all bolts loosely first. Tighten evenly, in a diagonal pattern — little by little, alternating sides. Do not run one bolt down tight and then start the next. Check the panel clears the frame and cable runs with no forcing. Confirm the pack is still fully seated and the connector is undisturbed. Why it matters Battery side guards are protective, not cosmetic. They shield the pack from branch strikes and from debris thrown off the front wheel. A cracked guard still needs replacing, which is why fitting order matters. Watch out for Tightening one bolt fully before starting the others — this is exactly how the panel cracks. Forcing a panel that does not sit flush. If it does not line up, you almost certainly have left and right swapped. Related Battery Care & Charging D-Series Overview Tutorials Index Unboxing & Assembling the D02 Electric Dirt Bike Crate to first ride: front wheel, handlebars, brake lever, footpegs, the pre-ride check, and the 0-gear power-on sequence that catches most people out. Applies to: D-series (D02 Classic, D02 Track, D03 Pro, D03 Beast) Off-Road Electric Dirt Bike D02 | Unboxing & Assembly — if the player does not load, open the video on YouTube. What you need Tool Notes 4 / 5 / 6 mm hex keys Supplied with the bike 10 / 13 / 15 mm spanners Supplied with the bike Box cutter or side cutters To open the carton — never cut deep enough to reach the bike Torque wrench Recommended; see Torque Reference Allow 45–60 minutes. Work on a clear, flat surface with room to walk around the bike. Steps Cut the carton straps and lift the box off. Keep the carton — it is the safest way to transport the bike later. Remove the packaging holding the bars, front wheel and footpegs to the frame. Do not discard the hardware bag. Fit the front wheel. Raise the front of the frame, slot the wheel in, insert the axle and tighten — leave it snug, not final-tight, until the brake is checked. Fit the handlebars. Align the bar with the clamp marks, tighten the four clamp bolts evenly in a cross pattern. Fit the brake lever and check the brake. Squeeze the lever — firm, not spongy. See Installing the Front Disc Brake if the caliper needs centering. Fit the footpegs, then the mirrors and any further accessories supplied. Check the battery is seated and the connector is fully home. Run the pre-ride check before first power-on — see Pre-Ride Inspection. The 0-gear trap The most common "my new bike won't start" call. On a D-series bike the display shows a gear number. If it reads 0, the bike will not drive — this is not a fault. Press the + button to select gear 1, then ride. See Won't Turn On. Watch out for Over-tightening the bar clamps — crushes the bar and creates a stress point. Alternate bolts, bring them up evenly. A spongy brake lever — usually air or an off-center caliper, not a failed brake. Forgetting the first-ride fastener check — fasteners settle in the first few miles. Re-check after your first ride. Related Pre-Ride Inspection Torque Reference Front Disc Brake Installation Tutorials Index Installing CEMOTO Pedals Two minutes of work — provided you get the left-hand thread the right way round. Applies to: eBikes and eScooters with removable pedals How to Install CEMOTO Pedals — if the player does not load, open the video on YouTube. What you need Tool Notes 15 mm pedal spanner Or a suitable adjustable spanner Grease or anti-seize Recommended — pedals seize into crank arms over time Steps Identify which pedal is which. They are marked L and R on the spindle, and they are not interchangeable. Identify which crank arm is which. The left crank is on the non-drive side (the side without the chain/gears). Start by hand. Thread each pedal in by hand for the first several turns. If it does not turn easily by hand, stop — you are cross-threading. The left pedal is left-hand threaded. To tighten it you turn anticlockwise. The right pedal tightens clockwise, like a normal bolt. This is the opposite of what most people expect. Tighten firmly with the spanner once it is hand-tight. It does not need to be brutal — the pedalling action tightens it further. Check both by rocking them side to side. Any movement means it is still loose. Watch out for Cross-threading the left pedal by turning it the familiar way. The crank arm's thread is soft aluminum; once damaged it needs a helicoil or a new crank. Greasing the thread — it helps now, hurts later. Anti-seize is the better choice. Confusing the pedals — fitting an L pedal to the right crank will not seat properly and will damage both. Related eBikes Overview Torque Reference Tutorials Index