I must be completely out of my mind to take my functioning BMW F650 Funduro and tear it down to rebuild it. What’s not to love about this bike? The high fender? The stickerbombed brushguards? The truck-mud-flap bash guard?? All perfectly acceptable mods to bomb around in the mud! But it wasn’t good enough. The Funduro was not really meant to be an offroad machine. Slightly modified from the normal F650 with a 19” front, taller suspension and longer wheelbase, it still was a porker at 421 lbs wet. I felt like a lot of that was coming from the fact it was adapted into an early form of adventure bike, rather than being built that way from the ground up. So I thought, I have another bike if I want to ride, why not try to improve the Funduro in better ways than the ADV equivalent of Tek-screwing a wing to a Civic. I have two main goals with this build. First, I wanted to improve its offroad capability. Second, I wanted to do this while spending a fraction of what it would cost me to find one of its well sorted F800GS grandchildren. As I would expect to pay about $10,000 for a bike like that, I intend to stay under $3,000 total spend on parts and any labor I may need as part of this build. To improve its offroading capability, I am making changes to the following: Suspension Upgrades I am changing the entire front end to that from a Cannondale X400. Originally I was going to do this with YZ450 forks and wheel, but a friend offered the X400 set to me for a very good price and it is NOS, in excellent shape. Added bonus is the 21" front wheel. I would love to retain the original brake setup, that may get added to the build. The rear shock I am upgrading to a shock from a F650GS Dakar, as well as adding to the top shock mount to increase the ride height. Reduced Weight As I said before, the F650 wasn’t originally dirt oriented but was configured that way. But the weight of the machine bothers me. So I am “adding lightness” where I can. I am removing the 13-½ lb stainless steel exhaust in exchange for a much lighter slip on. The heavy dash, fairing frame and glass headlight are being replaced with a Trailtech Vapor mounted to a Nav-tower style dash that will also be holding Hella HB3 High and Low projectors. I may go with an Antigravity battery, but may just stick with an AGM to keep costs down. The other side of this weight saving is so I can add things like a proper bash-guard and possibly crash bars (again, cost) Though it is not much weight saving, I also wanted to reduce complexity by changing out the original dual carburetor setup with the single carb from the Bombardier DS650 that shares the exact same Rotax motor as the F650. This also means I am doing away with the airbox, but I am still working on how to provide both filtration and protection from water crossing. Improved Cooling I intend on replacing the heavy, original steel (copper/brass? its big and heavy and I don't know radiators...) radiator with a lighter aluminum split radiator. The original was very wide as well and vulnerable to puncture if I would go down on the trail, though I don’t know which radiator I am choosing for this yet, to adapt to the F650 frame. I am also planning on adding an oil cooler, as these bikes tend to run pretty hot. The more cooling I can provide, the better. At the moment, the bike is almost completely down to bare frame. I need to finalize some design choices before I can make any frame modifications. From there it will be putting it back together. If you are a fan of Instagram you can follow along with #MPPFunduro as I work on the build where I can. I’ll try to do periodic updates here as I make progress. I have a very bad habit of not finishing projects, but I promised myself I would finish this one! I am really excited to do so and hope to submit it to the local bike show Garage Brewed for 2021, so that’s my deadline! Thanks for reading about my build! Follow #MPPFunduro on Instagram or keep checking back on this thread for updates!