Let me start by saying I used the search function and read all the posts regarding this. This isn't about what it does or how to remove it. It is about my impressions after disabling it. I have had my 10 for 2 years and just left the valve alone even after putting on a Leo Vince slip-on. So last weekend I started to research it again and decided since it was so easy to do why not try it and test it since it is reversible and takes about 5 minutes to do. I wasn't expecting any type of huge gain or even a noticeable difference. But I was more than suprised when I took it out afterwards to ride it. First thing is throttle response was GREATLY improved. This was the biggest thing for me. I always disliked the abruptness of the on/off throttle of the 10 especially in mid corner. Well that has been totally resolved. Next thing was the power characteristcis. I can't say I noticed any loss in low end. What I did notice was an increase in the mid-range hit. My front wheel wants to come off the ground anytime I get near that sweet spot more so than it did before. The motor also seems to rev faster. It just seems to build steam quicker so maybe that's why I didn't really notice any loss of low end. Now I am not saying that this gave me 10HP or anything. What I am saying is I think it improved the power charateristics. I do wonder if it was possible that the valve wasn't functioning properly since I saw in some of the posts that this was the case on some 10s. I know for me, its a good mod and I am keeping the valve disabled.