5 Speed F8B?

[Okgolol]

Hey just wondering if anyone knows of a 5 speed box that fits and F8B?

[Brayden]

There are several options. None are a bolt-in fit.

F5A/F6A import 5 speed. Same final drive ratio as an F8B, just a different spread between gears. Requires matching flywheel and starter, and custom driveshafts.
Matiz F8C 5 speed. Starter motor placements creates difficulties, and the cable shifter requires adapting. Plus same flywheel/driveshaft issues as above.
Swift G10A 5 speed. Requires adapter plate, and has the same flywheel/driveshaft issues as both of the above.