Drifts left...

[Jlittle]

I noticed hen  take my hands off my handle bars my bike goes on it own.  What would cause this? Is there anything i can do to fix this

[the mole]

Check the back wheel is straight in the swingarm, don't trust the marks on the adjusters, use a straight edge or stringline. That's the most likely, otherwise you're looking for something bent ie. swingarm, forks, frame.

[5thAve]

worn tires can affect drift, but not usually very much. 

Check on different kinds of roads -- the biggest factor is the crown in the road surface.  Most of the time your bike will drift to the right toward the shoulder of the road because the road is crowned that way for drainage.  Is the road worn? It can become 'truck rutted' enough to change your drift even if the 'flattening' of the pavement is barely visible to the naked eye.

[dohabee]

When I only had 1 mirror It caused the bike to turn as you mentioned (only at high speeds) due to uneven wind resistance.

I suspect you would only notice this if the wind was pushing on the handlebars as opposed to the frame ( only 1 mirror or maybe a gps/radar detector on 1 side)

[dgyver]

It does not take much off balance (of you) to make a bike lean and turn.

[LOUiE]

It does not take much off balance (of you) to make a bike lean and turn.

do you have a large overhanging growth on one side... that could be your problem....

[Jlittle]

Well my pee pee does hang to the left side... Damn never thought of that...

I have tested it on alot of diffrent roads the back tire might be it i also have about 15k miles on my front and they are cupped

[bobthebiker]

then replace the tires, do the string thing to check your rear wheel alignment, and it should solve it.