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8FUN BBS01 BBS02 Gen1 old version nylon helical gear with 6mm bushing, only fits original first generation BBS01 / BBS02 mid-drive motor. NOT compatible with new BBS01B BBS02B G340 (4mm bushing), must check dimension before purchase.
This is the first generation old model helical nylon gear for 8FUN BBS01 / BBS02 mid-drive motor. It features a 6mm height metal bushing, the key identification feature to separate it from the newer G340 BBS01B / BBS02B gear.
Critical Warning: This Gen1 gear CANNOT swap with the new generation BBS01B / BBS02B G340 gear which uses a 4mm bushing. The inner metal base structure is different.
✅ 8FUN Original BBS01 / BBS02 (Gen1 old version mid drive motor) ❌ NOT fit BBS01B / BBS02B G340, G341, BBSHD, BBS03, hub motors or other mid motors
| Parameter | Value |
|---|---|
| Product Name | 8FUN BBS01 BBS02 Gen1 Nylon Helical Gear (Old Version) |
| Bushing Height | 6mm (key distinguishing mark) |
| Material | High strength wear-resistant nylon + metal bushing + needle bearing |
| Gear Type | Helical gear (helical tooth) |
| Application | Gearbox repair, replace worn / cracked original gen1 BBS01 BBS02 gear |
| Remarks | Not interchangeable with new G340 BBS01B BBS02B 4mm bushing gear |
1 × Gen1 Old Version Nylon Helical Gear (pre-assembled with metal bushing & needle bearing)
✅ Gen1 OEM matching geometry: Exact same tooth profile and 6mm bushing dimension for original 8FUN BBS01/BBS02.
✅ Wear-resistant nylon material: Designed for BBS01 / BBS02 gearbox operating environment, reduce gear noise.
✅ Pre-assembled with needle bearing and metal bushing, ready for direct installation after motor disassembly.
✅ Important visual difference: 6mm bushing height vs new G340’s 4mm bushing, easy to identify before ordering.
✅ Solve common fault: cracked, stripped or worn helical gear inside BBS01 / BBS02 gen1 gearbox.
Brand: After-market compatible for 8FUN
Product Name: 8FUN BBS01 BBS02 Gen1 Old Version Nylon Helical Gear
Fitment: First generation 8FUN BBS01 / BBS02 mid-drive motor
Bushing Height:6mm (New G340 BBS01B/BBS02B =4mm)
Material: Nylon gear body + metal bushing + needle roller bearing
Package Content:1 × Nylon helical gear assembly
❗ Most important reminder: This is OLD GEN 8FUN BBS01/BBS02 gear with 6mm bushing. It is NOT compatible with newer BBS01B / BBS02B G340 motors which use 4mm bushing gears. The inner metal lock structure is different between Gen1 and G340 versions, parts cannot be cross installed. Please measure your original gear bushing height before ordering to avoid wrong purchase. Full motor gearbox disassembly required for installation, professional ebike repair skills recommended. Only gear assembly included, other motor parts in reference images are NOT included. Ideal spare stock for ebike repair shops servicing older 8FUN BBS01 / BBS02 mid drive kits.
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