not for sale anymore see 

41mm fork leg here https://www.twinmotorcycles.nl/webshop/artikel.asp?mc=1&aid=793&cid=0&s=steering&a=

43mm fork leg here https://www.twinmotorcycles.nl/webshop/artikel.asp?mc=1&aid=794&cid=0&s=steering&a=

Buell Steering Damper for XB series. Compact design, Fits under the steering head.

You need to replace the front isolator hanger bolt with a longer one ( included in the kit ) .

Includes all mounting Hardware.

This product fits on all 2005-10 Buell XB 9/12 models with 43mm fork slider tubes, 56mm outer tubes (except XB12X 08-2010 ), Note:

Will not fit 08 Uly XB12X due to greater steering angle and XB Scg LOW models.

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