Setting up Basic Pedal Assist Sensor (PAS) with Cycle Analyst

Hey, what's up everyone, Abbas here from Golden Motor. Today I'm going to show you how to install pedal assist on your e-bike using the Cycle Analyst Version 3.1. The Cycle Analyst is a universal e-bike display that can work with virtually any e-bike system. It’s a great solution if your current setup lacks pedal assist or if the existing one is limited or not working well—it offers up to 20 levels of assist and a lot of advanced functionality.

To get started, the system includes a component called a "shunt," which connects between your battery and your controller. The shunt has two sides: one goes to the battery and the other to the controller. Additionally, there’s a signal wire—specifically a green wire—that will connect to your controller. This signal is crucial for allowing throttle and pedal assist functionality via the Cycle Analyst. Once the shunt is installed, connect the Cycle Analyst display and throttle. There's also a two-button switch that plugs into the Cycle Analyst and allows you to adjust pedal assist levels on the fly. Finally, install the PAS (pedal assist sensor) on the bike.

For the PAS magnetic ring, you can install it on either side of the bike, though most prefer the non-drive side for simplicity. The 12-pole PAS sensor kit includes two magnetic rings—one solid, one split. Use the split ring if you don’t want to remove your crankset. Simply open it, mount it behind the crank, and secure it with the included metal ring to ensure it doesn’t come loose while riding. Align the PAS sensor so the LED lights up every time a magnet passes. The sensor has tape on the back, but for a reliable setup, use zip ties with the provided mounting holes.

Next, connect the shunt between the battery and controller. It's clearly labeled, so battery wires go to one side, and the controller wires go to the other. Out of the shunt is a 6-pin female JST connector, which plugs directly into the 6-pin male coming from the Cycle Analyst. Now connect the PAS sensor. The Cycle Analyst has a 5-pin JST female, while the sensor has 4 wires. The connector is directional and will only fit one way—align it properly and plug it in.

One of the most important steps is wiring the Cycle Analyst throttle signal into your e-bike controller. From the shunt, a separate wire bundle comes out (usually green, black, and yellow). For this installation, you only need the green (signal) and black (ground). If you're using a Magic Pie 5 controller, cut the throttle wire (5-pin) and strip it to expose the green and black wires. Then, connect green to green and black to black—this ensures the Cycle Analyst's throttle signal is properly routed to your controller.

Once wired, connect your Cycle Analyst throttle. It's a 3-pin male plug labeled “Throttle” on the display. It’s recommended to use a throttle specifically designed for the Cycle Analyst to avoid extra splicing. Then, connect the Digital Auxiliary Button to the JST female labeled “Aux.” This lets you toggle assist levels. It also has a secondary output so you can connect a 3-position switch or potentiometer later if needed.

Now, it’s time to program the pedal assist on the Cycle Analyst. From the home screen, hold the left button to enter the menu. Use the right button to scroll to “Setup PAS Device.” Initially, it will be set to “Disabled.” Hold the right button to edit, then press the left button to change it to “Basic PAS” and save with the right button. For pole count, set it to 12 (default for the green PAS kit). Set “Signal Type” to “Two-Wire” since the included sensor uses two wires. Set the “Polarity” depending on which side you mounted the ring—if the bike activates PAS while pedaling backward, it’s reversed and needs correction. When done, save and exit.

Next, configure the PAS power profile. Go to “Setup PAS Config.” Change “Assist Type” to “Basic Power.” The next field is “Max Watts,” which defines how much wattage the pedal assist can deliver. If your motor is 1000W, set it to 1000. Use the buttons to scroll and input the value, then save. This step is optional but useful for limiting or expanding your PAS output.

Now configure the Digital Aux Button. Go to “Setup Aux,” and set control type to “Two Button.” For function, choose “PAS Level.” Then set “Startup Level” to either “1” or “Last Level,” depending on your preference. You can also define the number of assist levels—default is 5, but it can go up to 20. If you want maximum granularity, set it to 20. Lastly, you can configure “Start Power %” at level 1. By default, it’s 0%, but you can increase it to suit your needs.

Now you can use the + and - buttons on your Digital Aux Button to switch PAS levels during a ride. Each level increases the assist in small increments based on your max watts setting. This completes the pedal assist setup using the Cycle Analyst V3.1. All parts used in this video are listed in the description, and you can reach out in the comments if you have questions.