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I'm hoping for some help ive been chasing a handle bar shake that comes on at 45 and goes away at around 65 MPH for 2 years now. Its been 2 different sets of tires (Conti Contact and conti Motions) Mounted at different places last set at tricky mikes. Ive changed the fork oil this year and no change although im not convinced its right different amounts from each leg came out 455ml from right and 435ml from left. I refilled the same amount i took out and didnt change anything acording to my book its should have 510ml in each leg so i added some to make it 510ml and the shake is still there. Also the height from the top of the fork down to the oil isnt right my book says 4.4 to 4.6 inches down from the top of the fork to the oil im more like 6 down i dont know if this is causing a issue or not ? I also tried tightening my steering head bearings same result. The chain and sprockets were new last year and the chain has just over an inch slack which is within spec.
Also its alot more noticable when i take my hands off the bars. with my hands off the bars it will shake pretty bad as to where i will have to grab them again but its still there when im holding them as well just not as bad
Im not sure what else to look for to cure this vibration any ideas ?
Thanks in advance Joe