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So I've 3d printed the crank truing stand, I'll upload that to thingiverse soon, may make some improvements first. It uses skate bearings. The crank is well within spec. maybe .04mm max at the very ends of the crankshaft. I've never trued a crank before, this is my first time measuring one even. The manual shows where to measure it. I'm curious if it's even worth the trouble to try and get it perfect, probably not obtainable. Obviously I can't smack the crank on these PLA stands
Hey all, First time posting so I apologize if I do something incorrectly. I recently purchased a 2016 DRZ400SM. After riding the bike for a few hundred miles, I noticed that an oscillating vibration developed between the speeds of 30-60 MPH. The vibration was vertical, and seemed to vibrate for 1-1.5 second intervals. I had fresh Dunlop Q3+ tires installed by the previous owner. Even though the balance of the wheels appeared to be spot-on, I removed the weights and rebalanced both wheels. This did nothing to solve my problem. I then checked the runout of the wheels, and the front appeared to be considerably out of round, both on the rim and the tire. I took the front to a local dealership where they trued the wheel, however there was a significant amount of uneven vertical runout on the tire itself, which I assumed to be from the wheel being out of round. I replaced both the front and rear Q3+ with brand new Michelin Pilot Power 2CTs. After riding for about 200 miles, I am beginning to notice uneven vertical runout forming on the brand new front 2CT. While not as pronounced now as it was with the old Q3+, I am beginning to notice that same vibration that I noticed before. I took the front wheel back to the dealership where it was trued, and the showed me that the rim is still (as far as I can tell) perfectly true. There are no obvious deformities in the wheel itself, I am positive both the front and rear wheels are properly balanced, and I am running reasonable tire pressures (26 front/28 rear). So now my question is- what should I try next to solve this problem?