I just purchased a new to me 2011 DR650, got a great deal on a bike that already had a few mods such as the big tank, TM40 carb, skid plate. I just bought new Shinzo 244’s, wheel bearings, brake pads, chain, sprockets, some led lights front and rear, the Cogent fork upgrade kit, and the mid pipe-GSXR muffler. I am excited to be working on an adventure bike and I have big plans in the future. Question 1: I ordered an OEM Suzuki countershaft seal retainer for the 2014 model, but noticed the countershaft seal changed part numbers from 2011 to 2014. Not sure why, same specs listed for both. I plan to use the 2014 seal with the retainer, any ideas on why this part number change? Question 2: I would like swap in a DRZ400 shock but can’t find the complete details on this conversion. I am assuming the 400SM shock is preferred, but can’t really find the a complete post from start to finish with detailed instructions and report. Several posts say it is a waste of time, the shock is too long, the spring is too light,etc. I am very interested in this conversion, but there is a lot of negative posts and not too many offering glaring positive results. Any thoughts on this proposed conversion?