I purchased a Throttlemeister for my 2011 Spyder. It worked OK. Then I purchased a Rivco Bar Riser. I had to buy a diffierent stem for the Throttlemeister because the replacement bars from Rivco are thicker than OEM. But now as soon as I put the friction ring on under the bar grip the throttle stops springing closed. Before I even put the stem and nut in place. Throttlemeister doesn't seem to want to respond to my email. Anyone else have an Idea?