Howdy,
I own a 2017 F3-S purchased in 2024. From experience I offer these tips.
Before Purchase, check for:
1).. Good service records as
@racoon said.
2).. Make sure everything works, especially the LH handgrip controls (as they can be a known issue), the brakes & cruise control.
3).. Budget for immediately changing all fluids & filters. This includes the fuel filter & brake fluid as corrosion in the master cylinders is not uncommon.
4).. Check if the drive sprocket & output shaft recalls have been completed. If they haven't... plan to have them done. Its zero cost to you but is an inconvenience.
5).. Check for error-codes being shown on the dash. If they do, they could be genuine problem or a sign the battery is past it's use-by. A battery going bad is well known to start throwing errors where there may not be any.
6).. Tyre age. Check & if they are old, budget for replacements.
7).. Condition of the drive belt & sprockets. Is the belt split/cut/damaged ? Are the teeth on the rear sprocket in good condition ?
After purchase:
1).. If it needs new tyres and/or still has the OEM Kenda's on it, plan to replace them with car tyres. Search the forum to see why.
2).. Immediately change all fluids & filters as above. The fuel filter is in a shocking location, requiring a lot of dismantling just to find it, but it's important to change it because you can also inspect the fuel lines at the same time. The fuel lines are crammed-in & have been known to start splitting at bends. The HCM filter is not cheap... but soooooo easy to replace compared to RT's & spyders with all the extra body panels around the engine.
3).. Ride and enjoy !