The device described in this manual is the muli motor st+px, an innovative quality product designed for daily urban use. It is a special bicycle with unique construction and riding characteristics compared to conventional bicycles, emphasizing safety and proper usage.
Function Description
The muli motor st+px is an electric bicycle (Pedelec) or EPAC (Electrically Power Assisted Cycles) designed to assist the rider with a motor that stops when pedaling stops. It provides assistance up to a speed of 25km/h. The assistance automatically stops again when you reach a speed of 25km/h. The motor supports the rider with its torque. The bicycle features a cargo basket, making it suitable for transporting goods or children.
Important Technical Specifications
Dimensions and Weight:
- Permissible total weight: 195kg.
- Max load on saddle: 100kg.
- Max load in cargo basket: 70kg.
- Max load on seatpost: 18kg.
- Cargo basket width (unfolded): approx. 60cm.
- Cargo basket width (folded): approx. 28cm.
- Child seat maximum load: 40kg.
- Child seat maximum weight: 22kg.
- Child seat maximum height: 120cm.
- Double leg stand load limit: 80kg.
- Dead weight of the muli: 33kg.
Frame and Components:
- Frame: Down tube, Head tube, Top tube load, Steering tube, Steering linkage, Boom - steering tube, Top tube rider, Saddle tube, Seat stays, Chain stays, Dropouts, Locking bracket, Basket holders.
- Wheels: Basket, Tire, Rim, Spokes, Hub, Valve, Quick release axle.
- Drivetrain: Chainring, Chain/belt, Crankset, Pedal, Gear shift (Shimano Nexus InterE 5-speed hub gears or Shimano Alfine 8-speed/11-speed hub gears).
- Brake System: Brake disc, Brake lever, Front brake (hydraulic disc brakes on front and rear wheel).
- Steering: Stem, Handlebar, Stem adapter, Steering bearing.
- Lighting System: Front headlight, Rear light (two battery-powered lights or two dynamo lights from Busch & Müller, white front light with integrated Z-reflector, red rear light with integrated Z-reflector, two yellow reflectors per pedal, facing front and rear, and ring reflectors on the sides of the tires).
- Battery and Control Unit:
- Shimano Steps battery 500 Wh: Offers Eco (lowest pedal assistance), Normal (medium pedal assistance), and High (strongest pedal assistance) support levels. Display shows battery charge level, speed, and support mode.
- Pendix eDrive 300: Gearless mid-motor with 250 W power, 300 Wh built-in battery, 6.9 kg total weight of drive system. Offers ECO, SMART, and SPORT support levels. Rotary switch on the handlebar to adjust levels.
- Accessories: Saddle, Seatpost, Seatpost clamp, Frame lock, Cargo basket, Child seat and transport, Rain cover, Double leg stand.
Legal Requirements (Germany):
- Two independently functioning brakes.
- Lighting devices: White front and red rear lights that cannot be turned on together, one white front reflector, one red Z-reflector at the rear, side reflectors on the wheel (or two spoke reflectors per wheel), two yellow reflectors per pedal (facing front and rear).
- A bright sounding bell.
Usage Features
Assembly and Adjustment:
- Steering Tube Assembly: Guide the steering tube extension and swivel bearing head, insert parts, tighten the bolt through the extension arm, and secure with the washer and nut.
- Steering Linkage Mounting: Pre-assembled and adjusted. Ensure proper attachment and secure connection.
- Pedal Mounting: "R" for right, "L" for left. Grease the pedal thread. Tighten with a 15 mm open-end wrench and a 6 mm Allen wrench. Check tightness after 100km.
- Bell Mounting: Mount on the handlebar.
- Saddle Height Adjustment: Open quick release clamp, adjust height, ensure seat post is not too deep or beyond MIN/MAX mark.
- Handlebar Height Adjustment: Adjust stem adapter (up to 10cm). Open quick release lever, pull handlebars up, and close.
- Seat Length and Saddle Angle Adjustment: Loosen hex socket screw on the seat post carriage, adjust length and angle, and tighten.
- Brake Lever Width Adjustment: Reduce grip width by turning the hex socket screw counterclockwise. Increase by turning clockwise.
- Lighting System Setting: Front light fixed, adjust angle. Rear light fixed, cannot be adjusted.
Before the First Ride:
- Familiarize yourself with the bicycle's characteristics.
- Perform first driving tests in a safe, traffic-free area.
- Do not start your first riding attempts on surfaces covered with sticks, sand, stones, or other debris.
- Ensure the motor assistance does not start unexpectedly.
- Check steering response, brake system, shifting, battery, and tire pressure.
Riding Characteristics:
- Driving: Motor switched on, pedal for support.
- Unfolded Basket: Wider than a conventional bicycle (approx. 60cm). Maintain a safe distance from the edge of the road or lane.
- Driving with Assistance: Three different assistance modes (on Shimano Steps) or support levels (on Pendix eDrive).
- Range: Influenced by selected support level, load, route conditions, weather conditions, tire pressure, and individual riding style.
Cargo Basket Usage:
- Loading: Max payload 70 kg. Distribute load evenly. Center of gravity as low as possible.
- Securing: Always secure load with lashing or tensioning straps.
- Folding: Opens without further intervention. Closing involves a slight swing against the spring-loaded locking bracket.
- Basket Covers: Made of high-strength and waterproof textile.
- Child Seat: Max load 40kg, max weight 22kg, max height 120cm. Insert into the basket, secure with plastic toggles and latch bolt.
Maintenance Features
General Maintenance:
- Cleaning: Clean with a soft, damp cloth. Do not use a high-pressure cleaner. Never immerse the battery in water.
- Regular Checks:
- Brakes: Check lining thickness, renew brake fluid.
- Tires: Air pressure check, profile height and material condition, spoke tension and concentricity, re-center rim, wear check.
- Lighting: Function check, correct fit of rear light, power cable and connections for damage.
- Gear Hub: Bearing clearance check, soak in oil.
- Hubs: Bearing clearance check, grease.
- Pedals: Bearing clearance and check screws.
- Seatpost: Grease.
- All bolts and nuts: Check and retighten if necessary.
- Stand: Check and, if necessary, retighten the screw. Check, stand must not drag on the tire.
- Stem Adapter: Check the tightening torque of the screws.
- Child Seat: Check seams, rivets, textile, screws, locking bar.
- Dropout: Retighten M6 screws, check for tight fit.
- Frame: Check for cracks, deformations, discolorations.
- All screws + nuts: Check and retighten/fix if necessary.
Specific Maintenance:
- Steering Linkage: Check bolts and nuts, ensure proper function.
- Brake System: Check brake pads and discs monthly. Replace pads when they are less than 1mm thick.
- Chain/Belt: Clean and grease chain regularly. Check belt tension.
- Battery: Only charge with original charger. Do not use a charger from another manufacturer. Store in a dry room at temperatures between 10 and 20 degrees Celsius. Check charge level every 2 months.
- Handlebar and Stem: Adjust bearing clearance. Over-tightening stem bolts can damage the steering tube.
- Cargo Basket: Check pan head screws for tightness. Never tension the basket covers so tightly that the basket wings no longer rest on the supports of the frame.
- Rain Cover: Clean with a soft, damp cloth. Do not bend the transparent window material.
Maintenance Intervals (W=Workshop, S=Self-employed):
- Before every ride: Brakes (check lining thickness), Tires (air pressure check), Wheels (check spoke tension, re-center rim, wear check), Lighting (function check), Gear hub (bearing clearance), Hubs (bearing clearance), Pedals (bearing clearance), All bolts and nuts (check and retighten), Stand (check and retighten), Dropout (retighten M6 screws).
- Monthly: Brakes (renew brake fluid), Tires (profile height), Lighting (correct fit of rear light, power cable), Gear hub (soak in oil), Hubs (grease), Seatpost (grease), Child seat (check seams, rivets, textile, screws, locking bar).
- Annual: Gear cables (check and grease), Bottom bracket (bearing clearance controlled), Regrease, Crank (screws check/tighten), Chain (check and grease, check for wear/replace), Belt (check for wear), Painting (cleaning), Cargo basket (fastening check), Steering bearing (bearing clearance check, grease), Steering linkage (check plain bearings for wear, check tight fit of screws and nut).
- Other Intervals: Brake lines (check for damage - weekly), Chain (check for wear/replace - from 600 Km), Belt (check for wear - from 600 Km), Stem adapter (check tightening torque - after 500 Km), Frame (check for cracks - weekly), All screws + nuts (check and retighten - weekly).
Recommended Bolt Torques:
- Stem handlebar mount: 6-8 Nm
- Stem - shaft mounting: 10-12 Nm
- Stem adapter: 9-10 Nm
- Gear hub: Axle nut 30-45 Nm
- Gearshift: Mounting steering bar 5 Nm
- Hub: Axle clamp quick release 6-8 Nm
- Pedal crank: Crank bolt 35-50 Nm
- Chainring: Mounting screws 8-11 Nm
- Pedal: Pedal axle 35 Nm
- Brake caliper to frame: Mounting screws 6-8 Nm
- Frame lock: Mounting screws 10-12 Nm and screw lock
- Seat clamp - fixing the seat post: Quick release on the seat tube 9-12 Nm
- Seat post head - Saddle mounting: Allen screw 20 Nm
- Mudguard: Mounting screws 5 Nm
- Front wheel with SH hub dynamo: Axle nut 20Nm
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