Ignitions and Electrical› Ignition Components
TwinPower
Twin Power L78-93 XL FX FXR 77 FXS Power Under Tank Ignition Switch Replaces H-D 71425-77T
SKU: T09O 490575
Easy — 1–2 hours
Description
This ignition switch is compatible with 1978-1983 Harley-Davidson XL, FX, and FXR models, as well as 1977 Harley-Davidson FXS models. The product dimensions are 4.50 inches in width, 1.00 inch in height, and 5.90 inches in depth.
Fitment
Fitment Guaranteed
Don’t gamble
on fit.
Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.
Available on iOS & Android
Specifications
| Brand | TwinPower |
| Part Number | T09O 490575 |
Buy with Confidence
Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.
View Full Return Policy