A plain black 130X-style thumb lever with a 3-pin female waterproof plug, made only for Bafang's BBS01B, BBS02 and BBSHD mid drives. It is the like-for-like replacement when the kit throttle cracks, sticks or stops sending a signal.
The BBSHD talks to its handlebar controls through the 1T4 cable, a single harness that splits into a display plug, two brake plugs and one 3-pin throttle plug. E-Mangue built this throttle to meet that throttle branch directly. Nothing gets cut, soldered or adapted, and the controller sees a part that behaves like the one it shipped with.
The shape is the familiar 130X thumb lever: a wide paddle under the thumb, a clamp that closes around the bar, and a short cable run to the harness. E-Mangue lists it for the BBS01B, BBS02 and BBSHD and nothing else, which is the honest answer. Bafang mid drives read a standard hall-effect throttle, but the plug shape and pin order are Bafang's own.
What you get in the box is short and simple.
The housing is plain plastic, and E-Mangue pitches it on resistance to ageing, wear and corrosion rather than on looks. That suits a part that lives in the sun, gets knocked in bike racks and takes the first hit when the bike falls on its right side. Keep the install guide nearby if the harness is new to you.
A thumb lever also suits the BBSHD better than a full twist grip for most trail riders. Your whole hand stays on the grip over roots and drops, and the lever only moves when your thumb asks it to. A twist grip can open by accident when the bike bucks, which on a 1000W motor means a surprise lurch at the worst moment.
| Spec | Value |
|---|---|
| Brand | E-Mangue |
| Throttle type | Thumb lever, 130X style |
| Compatible motors | Bafang BBS01B, BBS02, BBSHD mid drives |
| Other motors | Not compatible, per E-Mangue |
| Connector | 3-pin, female |
| Plug sealing | IPX4 waterproof plug |
| Harness branch | Throttle plug on the Bafang 1T4 cable |
| Cable length | 17.7 inches (about 45 cm) |
| Cable | High-temperature resistant |
| Handlebar clamp | φ22.5 mm |
| Mounting side | Left or right, universal |
| Housing | High-quality plastic, wear and corrosion resistant |
| Control surface | Large thumb button area |
| Colour | Black |
| In the box | One thumb throttle |
A thumb throttle earns its keep in the moments pedalling cannot cover. Starting on a steep pitch with a loaded rear rack, crawling through a rock garden with the cranks level, or rolling a trailer away from a stop sign are all throttle jobs. On a BBSHD the lever hands you the full controller current, so a light thumb counts for more than on a small hub kit.
The wide paddle helps here. A big contact area lets you hold a steady part-throttle position without pinning the lever, which is what you want on loose gravel where a sudden jump in torque breaks the rear tyre loose.
Where the throttle helps and where it does not:
Many riders also program the throttle to deliver less than full current at small deflections, which makes the first few millimetres of lever travel far gentler. That is a controller setting, not a throttle feature, and it works with any Bafang-compatible lever.
A BBSHD throttle is a hall-effect sensor on three wires: a 5V supply from the controller, a ground, and a signal wire that rises as you push the lever. Because the controller supplies the 5V, the pack voltage never reaches the throttle. That makes diagnosis easy with a cheap multimeter and the battery switched on.
Work through the symptoms in order before buying anything.
If the supply is present but the signal never moves, the sensor or magnet inside the lever has failed and a replacement is the fix. If the supply itself is missing, the problem sits upstream in the harness or controller, and a new throttle will not help. The controller guide traces that side of the wiring.
A cracked housing is its own failure. Water gets in, the hall sensor corrodes, and the throttle begins to creep or stick on, which is the one failure worth replacing immediately.
E-Mangue warns buyers to measure their connector before ordering, and that advice deserves weight. Bafang's round waterproof plugs, often called Higo-style, come in several diameters, and aftermarket harnesses do not always match the original. A 3-pin plug of the wrong size will not mate however hard you push.
Do these checks before the throttle arrives.
Installation takes a few minutes: slide the grip off, fit the clamp inboard of the brake lever, angle the paddle so your thumb finds it without shifting your grip, then route the lead along the brake hose to the 1T4 junction. Mounting it on the left frees the right side for a trigger shifter.
Leave a small drip loop in the lead just before the plug so rain runs off the loop instead of along the cable into the connector. A dab of dielectric grease on the pins before you push the halves together keeps corrosion out through a wet winter.
Against the other two Bafang-plug thumb throttles, the E-Mangue is the stock-shape pick. The Hizoncore states a 9mm plug and fits Super73 bikes too, while the SUNGOOYUE is a quick-release, right-side lever.
E-Mangue lists it for the BBS01B, BBS02 and BBSHD with Bafang's 3-pin throttle plug, which is the UART 1T4 layout. CAN-bus kits use different connectors, so check your harness first.
Yes. The clamp works on either side, and moving it left is a common way to free room for a right-hand trigger shifter.
No. The controller feeds the throttle about 5V whatever the pack voltage, so the same lever works on 48V and 52V builds.
Bafang-style plugs vary in diameter and gender between harnesses. This one is a 3-pin female; the harness side must be male and the same size.