[repsol]

when riding at about 120+ the steering start to shake left and right (just enough to make me back off on the throttle). does anybody know what should i be looking at inorder to fix this?

it shake both on street and track.

any ideas?

it is a 99 gsxr600

 

[RACER X]

tire balance? head bearings?

 

[DreddR6]

when riding at about 120+ the steering start to shake left and right (just enough to make me back off on the throttle). does anybody know what should i be looking at inorder to fix this?

it shake both on street and track.

any ideas?

it is a 99 gsxr600

It can be a number of things. Your wheels may be out of balance, it may also be the type of tire. Some tires sacrafice top end stability for stickyness.

I'd start off with inspecting the tires, making sure no bumps, lumps, and then have them balanced.

 

[Neverlose]

could low tire pressure cause this?