Honda Monkey 12V, possibly bored, running well, custom parts

A 1970s–1980s Honda Monkey 50cc (Z50J-2111...), 12V model. Engine number Z50JE-2016..., with registration documents. Recently serviced with new oil and spark plug; starts on the first kick, idles stable, no abnormal noise. Meter reads 60 km; seller notes the engine character and kick feel suggest it may have been bored out, though original paperwork shows 49cc. Runs smoothly and shifts cleanly with no gear slippage. Custom parts include Takegawa down muffler, rare Takegawa generator cover, aluminum steps, aftermarket carb and air filter, replacement seat and seat bar, and aluminum wheels. Tank has no rust inside; frame appears clean. Bodywork: minor dent on right side of tank, otherwise no major dents or visible scratches. Light, horn, turn signals, and tail light all functional. One original key included with spare. Seller confirms regular engine starts and careful storage. For video of engine running, see YouTube link in original listing. Sold as-is, no warranty, no returns; seller makes clear this is a used motorcycle in current condition with no pre-sale inspection, tune-up, or guarantees.

Seller grades this as used with scratches and dirt (傷や汚れあり). Minor dent on right tank; frame and bodywork otherwise clean. Minor surface rust noted as typical for age. All electrics and engine reportedly function.