Is there a manual timing chain adjuster available for a 2007 YZ250F? I am really concerned that if the timing chain lost tension when the throttle is let off of quickly as claimed by aftermarket companies, that every thing that I have been doing is in vain to prevent a catastrophic failure. Furthermore, it really burns me that Yamaha would correct a faulty center intake valve on a previous model (06') with a free valve replacement, and then turn around and continue the use of an auto adjuster that has the potential and catastrophic possibility of costing someone $1200 every time it does jump timing, because of the loss of tension. Aren't the tolerances supposed to be built into the specs to allow for this scenario? From what I understand, aftermarket companies are using scare tactics to make people believe that engineers had no idea what they were doing when I bought a well oiled machine. And if that is or isn't the case, does anyone have the actual numbers as to the probability of how often this happens? To me, this is similar to building the perfect bomb, but having no idea how to build the timer for it so that it doesn't blow your a$$ up. Now I am really looking for constructive input on this one please. I am not knocking Yamaha or aftermarket companies in any way, I just am about to finish a completely new bottom and top end, and here it is I find that built-in tolerances may not cut it when it comes to something as crucial as this valve train. I have read that Yamaha has one of the most reliable valve trains on the market and from personal experience, I couldn't agree more. A $60 manual adjuster is cheap insurance for a $2280 rebuild if it is available for a 2007 YZ250F. Thanks in advance for your input or thoughts. Edited June 2, 2011 by nokickstandsallowed I looked closer at the '06 valve recall threads.