What is the mechanic tweaking?

[kennylmao]

Okay, first picture shows my awesome kart.

09012012234 by kvin_lo, on Flickr

Second picture shows the guy tweaking something with his fingers.

09012012235 by kvin_lo, on Flickr

Third picture shows the same guy, but what is he tweaking?

09012012236 by kvin_lo, on Flickr

 

[Brando-K]

I think he's just looking at the kart. He has his left hand on the ground for balance.

 

[kennylmao]

But what about his right hand?

 

[ROYALEFATALE]

the right hand is probably at the spot where normal car wheels would touch, it doesn't compensate for karts

 

[Brando-K]

That's what you meant, oh.
I think what ROYALEFATALE said makes the most sense.