Its not important what side you are on, just don't change lines suddenly. If a fast guy is passing you, stick to your line and he will know how to get around you.
NEVER change lines anywhere near or after a jump. Otherwise someone is going to get jumped on, or the fast guy will need to make drastic changes to miss you that will cause him to wreck.
Some tracks have optional jumps where one half of the track has an easier set of doubles or a table, and the other might be a tripple. In that case, stick to the easier option if you have no intention of jumping the tripple.
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Reeko
(Now a Red Rider)
01CR250 (Me)
00XR100 (Wife)