Triumph 1200 Bonneville Bobber Fork Seals
The Triumph 1200 Bonneville Bobber runs a 41 mm upside-down front fork, oil seal 41x53x8 (Kayaba 41mm USD (Aprilia Dorsoduro 900 / Shiver 900 / BMW G310 / Triumph Street Triple group)).Every kit here is verified by the manufacturer to fit this exact bike. Fork seals can share a size and still not seat in a different fork, so we only list what is confirmed for your bike.
- Fork tube41 mm
- Oil seal size41x53x8
- Fork typeUpside-down
- ForkKayaba 41mm USD (Aprilia Dorsoduro 900 / Shiver 900 / BMW G310 / Triumph Street Triple group)
| Kit | Years | Seal size | Replaces OEM |
|---|---|---|---|
| 55-117 | 2017–2021 | 41x53x8 | Aprilia 2B004402 |
| 57-107 | 2017–2021 | n/a | n/a |
| 56-129 | 2017–2021 | n/a | n/a |
| 38-6096 (bushings) | 2017–2021 | n/a | n/a |
Verified fork kits we stock for your Triumph 1200 Bonneville Bobber
Fork Seal Kit
Fork Oil Seal Kit — Aprilia Dorsoduro 900
$18.24
Fork Seal Kit
Fork Dust Seal Kit — BMW G310GS (2022-2025) +
$20.62
Fork Seal Kit
Fork Oil & Dust Seal Kit — BMW G310GS
$39.78
Fork Bushing Kit
Fork Bushing Kit — Kawasaki EN500 Vulcan LTD
$50.56
Fork oil for your Triumph 1200 Bonneville Bobber
A fork-oil change on the Triumph 1200 Bonneville Bobber uses 10wt fork oil, about 499 ml per leg (oil level 106 mm). Factory fill: Kayaba G10 (SAE 10) — Showa SS-8 on some.
