Just Purchased a holdover 06 gsx-r 1000. My problem is i was out breaking it in and everytime i set down a 2nd gear wheelie I get all kinds of head shake. It didnt happen at first i would say it started about wheelie 6 or 7. Can anyone tell me if i knocked something loose or what might be causing this. Never had this problem on my old bike, i guess it would help if i just knew what caused it.

 

Maybe you broke the steering dampner or its mount?

 

Could perhaps be the back bearings. My old bike had a woobly back tire that made all sorts of shakes.

 

FOUCS ON KEEPING THE BARS STRAIGHT, STEERING DAMPER OR NOT, IF THE BARS ARENT STRAIGHT THE BIKE WILL START TO "TANK SLAP".