What kind of oil do I use in my 2002 yamaha R1?

SOURCE: 2002 Yamaha R1 shifting problem

OR THE SHIFT GEAR AND RETAINING SPRING IS WORN

SOURCE: ENGINE OIL CAPACITY

On the oil filler port is a number with CC after it. This is the crankcase capacity in cc. There are 946cc in one US quart. Do not neglect to fill the filter with oil (but do not overfill) before installing it, and do not consider that amount when filling the crankcase.

Hope this helps,
matt

SOURCE: how much and what of oil is the best kind of oil

Full synthetic oil will work the best for your bike. Synthetic has been over-engineered in a good way.

P.S: DO NOT USE car synthetic oil as they have TOO MUCH friction modifiers (not good for wet clutch).

SOURCE: oil light blinking on 2004 yamaha r1

Have you ever changed the oil and oil filter before, it is telling you to change it? Good enough

SOURCE: what kind of oil does a 2001 yamaha R1 take?

it all depeends on what the climate is where you live here in the uk we would use
10w40 semi or fully synthetic oil, 10w40 grades of a lesser quality could be used but i would not recomende it