What is the best oil to use for my vtr 1000 - 1998 Honda VTR 1000 F Firestorm

The engine oil capacity for the 1998 Honda VTR 1000 Firestorm depends on the specific situation:

After draining: If you're changing the oil and filter, it requires approximately 3.9 liters (4.1 US quarts or 3.4 Imperial quarts) of oil.

After disassembly: If you're performing a more extensive service, the capacity increases to approximately 4.5 liters (4.8 US quarts or 4.0 Imperial quarts).

Make sure to use SAE 10W-30 motorcycle oil that meets the JASO MA or API SG standards. The Pro Honda GN4 10W-30 is a suitable choice for engine oil. Additionally, replace the oil filter with a HifloFiltro HF204RC filter and use an NGK DPR9EVX-9 spark plug.
Honda VTR1000F Firestorm (SuperHawk) Maintenance Schedule

Hi there,

a 20-50 Repsol 4-stroke Motorcycle Engine oil will do. Castrol Gold is also a good choice.

Hope this helps

after draining 3.7 L (3.9 US qt ,3.3 IMP qt)

oil and filter 3.9 L (4.1 US qt , 3.4 IMP qt)

after disassembly 4.5 L (4.8 US qt , 4.0 IMP qt)

If you want to change your fork oil, best way is to drain a fork leg into a container, and measure the amount that comes out. You can make your forks softer or harder by varying the amount of oil.

yes, your cylinders can be bored. The factory offers pistons in 0.25 and 0.5mm oversized.

What kind of steering dumper is that? What brand?
If it uses gas chamber you cannot fill it yourself.If it is only with oil you can rebuilt it but you need some tools (depends on the brand) and if you can find a sevice manual it would be a lot better (to know how much oil to put inside and parts that you may need).