Currently have 44,000 km on my 2015 FZ6R. Owners manual states valve clearance adjustment needs to be done at 43,000 km so I called the Yamaha dealer where I live and asked about getting it done. He told me of all the FZ6R bikes they've sold over the years, no one has ever brought one in for a valve clearance adjustment. I was wondering if it's really necessary. The dealer quoted me at $600 for the work. I know of another motorcycle repair shop in the area that will do it for $400. Planning on a 20,000 km summer, including two trips over 8k each. Should I get the valve clearance checked?