I have a 2010 YZ450F with a Rekluse Core EXP and it is great, but I think I want to add a flywheel weight as well as I would like to be able to adjust my engagement point a little lower on the Rekluse but it is already prone to stalling out. My question is this-- what tools do I need to install the GYTR off-road flywheel? Do I just need a flywheel puller? If so, will the one I had for my '06 work, or is it a different size now? Also, I have a new Renthal 52-tooth rear sprocket that I would like to put on. However, I just put on a new Regina chain (stock size- 520x114) and I don't think it is long enough to fit this bigger sprocket. If I go down one tooth in the front do you think it will fit?