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I am in the process of restoring my trusty 2007 450 EXC and just thought I'd document some of the things I did. If anyone has any questions, let me know. A little back story first. This bike has been absolutely great for years first of all but around 4 years ago even though I had a dirt tricks belleville washer and red loctite, the front sprocket bolt fell out on a two day Nevada ride. Made it back ok but the countershaft splines were starting to wear. Fast forward to 2019 and the CS gave out on me on a big hill climb in the middle of Nevada. Towed out 5 miles and luckily all was OK. I have since bought a 2019 500 EXC but decided to restore it. With all the Covid stuff happening it has given me time to really clean and polish this whole bike. Here is a photo about a month before the breakdown. Start of the teardown. Don't zoom in to those countershaft splines, it's not pretty. On a side note I had just done a top end 80 hours prior and had roughly 500 hours on it before that. Engine sent to Travis at Thumper Racing in NV for bottom end work and a good lookover. Frame about to be sent out for powder coat. KTM Orange. I wasn't going to even do this but man, might as well since it was apart. $125 locally in my small mountain town. Its funny how this all started when I was only going to really clean the airbox out really well when it was still in the sub-frame, nope. Before.... After... with Purple Power degreaser. You don't realize how dirty and corroded things get. Before.... After... I initially just wanted to clean things up. Scotch brite to header pipe, clean up radiators, decrease and once over everything. Then I learned a few cleaning tips from a guy named Cameron Niemela on YouTube. Then I went out and bought some mag wheel cleaner, a buffing wheel and some Scotch Brite wheels from his Pryme MX site. This is where I think I started beginning to lose it. I had to clean or polish everything. I'm gonna post this before I lose what I have written already. I'll just add stuff as I go on this restore. Stay tuned.