gap at .031 - .035
use the Honda brand its by far the best and is specially formulated for Honda motorcycles.:)
3.1 US quarts, 3.3 quarts with a filter change.
.60
According to the spark plug manufacturer NGK, the recommended gap for a 2001 Honda XR100 is .028"
0.028
.044
headlight
.020" to .025"
Get a spark plug socket and unscrew the spark plug and replace with a new one.
450 ml.
I don't think the basic shadow came with one, if you add saddle bags and such then you have storage
About 3.5 to 3.7 quarts.