Despite the bad press on this and other sites, I decided the notchy throttle on my 2010 450F was more than I wanted to deal with, and decided to call Injectioneering for their help. On the track, the notchy throttle was not an issue, which may be why a lot of the magazines aren't talking much about the problem. Desert riding, picking your way over and around rocky creek beds, however, is another issue. I found myself wondering *** with the notchy throttle response off idle...The way I describe it, it is similar to cruising in your car or truck at a constant speed/throttle position and clicking the key on and off, that sort of response. I found if I snicked it a gear higher and used the clutch to decouple the motor's response from the rear wheel performance was acceptable, except for all the clutch action....I contacted Wade Wilcox and he assured me his mod would have me one handing it through and around the rockpiles using just the throttle, no clutch...I also asked about the bad press and roasting he had been getting about his business practices and modification turnaround time. He offered there were 2 sides to every story, and he was working diligently at getting all issues resolved. I removed all the extraneous hardware from my throttle body and sent it to him the Friday before Labor Day. I asked him to let me know when he received it, and he called me twice Tuesday, once to let me know FED-X had arrived and my TB had not, and later, he left a message that USPS had delivered my TB. The following day, Wednesday, he called to let me know he had shipped my modified TB UPS, and to expect it Friday. I received it Friday, (total turn around 5 business days) reinstalled it and was just this past weekend able to get back out in the rockpiles I had found so frustrating several weeks before. There was a night and day difference in the way the motor responded. No more hery-jerky reaction with the slightest touch of the throttle. I would highly recommend this modification to anyone that takes their 2010 YZ450F off road. End of discussion.