Actually, it could be made to work but you would have to call penske, get all the parts to mount it up, and then have it rebuilt with valving and spring rates specific to the 919 and your weight. It might even actually cost a little less than just buying a brand new Penske outright but I am doubtful overall. You can check at Traxxion Dynamics at 770-592-3823 and phone in and ask the questions and they could give you an estimate. Likewise, if you decide to go with a new Penske contact J.D. Hord at Hordpower.com or (419)563-0348. JD is an awesome guy. He specializes in V twins but he is a racer and has a relationship with Penske that will provide you service from fit to finish and he'll make sure that the setup is right not only for your bike but for your specific needs. He will offer you some options based on budgetary limits, but you have to realize up front that a good brand name shock is going to be an investment, not necessarily in money, but in refining the way your bike handles.