Jon Byford
- Rasys
- 4
- Safle dosbarth gorau
- 25fed M
- Winter Sugar Loaf/Mynydd Pen-y-fâl gaeaf
- Safle categori gorau
- 4ydd MV50
- Llanbedr-Blaenafon (×2)
- Safle cyfres gorau
- 178fed
- South Wales Series 2025
- Sgôr cyfartalog
- 111.86
| SafleSaf | Dyddiad | Ras | ||||
|---|---|---|---|---|---|---|
| 2026 | ||||||
| 32 | 31 Ion 2026 | Craig yr Allt M 28 MV50 7 | ||||
| 2025 | ||||||
| 33 | 29 Maw 2025 | Llanbedr-Blaenafon M 28 MV50 4 | ||||
| 2024 | ||||||
| 28 | 2 Tach 2024 | Winter Sugar Loaf/Mynydd Pen-y-fâl gaeaf M 25 MV50 6 | ||||
| 45 | 30 Ebr 2024 | Pentyrch Hill Race M 42 MV50 4 | ||||