Pre-Assembly
- Using a razor knife (Box Cutter) cut the outside, bottom, edge of box along the dotted Line. Lift Box over the unit and unpack.
- Carefully remove all parts from carton and inspect for any damage or missing parts. If damaged parts are found, or parts are missing, contact the XTERRA Service Department by calling 800-258-8511 (Monday-Friday, 8:00am-7:00pm CST).
- Locate the hardware package. Remove the tools first. Remove the hardware for each step as needed to avoid confusion. The numbers in the instructions that are in parenthesis (#) are the item number from the assembly drawing for reference.
Assembly
MB550 Step-by-Step Assembly Instructions
1. Stabilizer Tubes
| Hardware Needed for This Step | |
| #106 | 3/8" x 2 Carriage Bolt (4 pcs) |
| #107 | 3/8" x 19 x 1.5T Flat Washer (4 pcs) |
| #108 | 3/8" Cap Nut (4 pcs) |
| #109 | 14/15mm Wrench |
a. Install the front and Rear Bar (2) (3) with four Carriage Bolts (#106), four Flat Washers (#107) and four Cap Nuts (#108). The front and rear stabilizer are different. Be sure to assemble the stabilizer with the wheels onto the front of the bike by using 14/15mm Wrench (#109).
2. Hub Cover
| Hardware Needed for This Step | |
| #117 | Combination M5 Allen Wrench & Phillips Head Screw Driver |
| #124 | M6 x 12mm Screw (1 pc) |
a. Install the Cover Front (L)(95) with one Phillips Head Screw (#124) by using Combination M5 Allen Wrench & Phillips Head Screw Driver (#117).
3. Handlebar
| Hardware Needed for This Step | |
| #112 | 8 x 25 Quick Release Lever |
| #113 | 5/16" x 35 x 3.0T Flat Washer (1 pc) |
| #114 | 5/16" x 23 x 2.0T Flat Washer (1 pc) |
| #117 | Combination M5 Allen Wrench & Phillips Head Screw Driver |
a. Install the handlebars (6) and Handlebar Post (4) together with Quick Release lever (#112) and one Flat Washer (#113) and one Flat Washer (#114) and one Button Head Socket Bolt (20) by using Combination M5 Allen Wrench & Phillips Head Screw Driver (#117).
4. Pedals
a. Install the Left (104L) and Right (104R) pedals to the crank arms. Please note that the Left pedal has a reverse threaded bolt and needs to be tightened in a counterclockwise direction. The pedals are identified by either an R or L stamped into the end of the bolt.
5. Water Bottle Holder
| Hardware is pre-installed for this step |
a. Secure Drink Bottle Holder (105) on the Main Frame (1) by using Combination M5 Allen Wrench & Phillips Head Screw Driver (#117) to tighten two Phillips Head Screws (#26).
6. Seat
| Hardware Needed for This Step | |
| #110 | 3/8" x 1-3/4" Carriage Bolt (1 pc) |
| #111 | 3/8" x 25 x 2T Flat Washer (1 pc) |
a. Assemble sliding seat mount (7) on top of seat post (5). Slide carriage bolt (#110) from top downwards through sliding seat mount (7), seat post (5) and flat washer (#111). Assemble seat fore/aft adjustment knob (103) and secure tightly.
7. Console
a. Use the wire-ties to hold the console mount and rubber protective pad on the front of handlebar (be aware of the console mount orientation). Pull wire-tie tight and cut off the excess.
b. Set the console in into the console mount in a clockwise orientation. Load the transmitter with batteries, connect the sensor cable which is already on the unit, and secure the transmitter to the frame with quick tape as shown. (Replace console battery if no digits are shown on LCD).
Before Using
Before operating your MB550, please do the following:
- Tighten all bolts/nuts securely to complete your installation.
- Adjust all four levelers so your unit sits flat on the ground for a stable ride. If placing on a mat or on carpet, then it may take time for your unit to settle into the floor padding and will not feel as stable as if placed on a hard surface.
- Make sure to tighten both pedals securely to the pedal crank arms as instructed.
- Once proper seat and handlebar height is selected, make sure to tighten securely for a solid feel.