Before I got my YZF-R1, I rode my 1994 XJ 600 Seca II all the time. It has around 80,000 miles on it. I rode it occasionally, and let friends ride it; but my friends moved away and there’s little enough time to ride the R1, let alone the Seca. I had it covered for a couple of years, and the moisure collected under the cover and rotted some seals. Here’s what I know it needs:
[ul][li]New battery[/li][li]Carburettor rebuild[/li][li]Fuel tank flush/cleaning[/li][li]Front suspension rebuilt (the seals rotted and moisture got inside)[/li][li]Oil and filter change[/li][li]Lubrication[/ul][/li]The tires were fairly new when it was parked, and there’s not a lot of UV radiation around here. What else should I expect to have fixed on the bike?
I’d want to have a look at the wheel bearings. And the rear suspension (was the Seca a monoshock bike?). The airbox might be home to mice or insects or even a kitten. And the tires might be cracked – rubber doesn’t age well.
ALL liquids will need to be flushed and refilled, including the brake fluid which I didn’t see mentioned. With that mileage and age, careful inspection of any and all bearings is a good idea as well, especially wheel and steering head bearings.
Tires, especially motorcycle tire compounds, don’t age well and they don’t like to sit regardless of UV exposure. I’d go ahead and replace them, but if you don’t, inspect them for any cracking on the surface and make sure they still feel like supple rubber and not bricks.
This would also be a good time to go over all the electrical connections. Check for corroded terminals, melting, darkened wires, etc. Better to find a potential problem now before you end up getting stranded.
I don’t know about the Seca, but many motorcycles have pretty feeble charging systems with stators and regulator/rectifiers being common failure points. I’d check to make sure you have proper charging voltage at the battery terminals when the engine is running at around 5K RPM. You should be seeing 13.5-15 Vdc on most bikes.