12-29-2017, 12:37 AM
These modern motors don't need the valves looked at like they used to. A Yamaha dealer told me about my FZ1, "I'm not going to waste your money. Just ride it." Valves go out of spec by redlining it. Having said that, a VFR was run flat out for 24 hours by a test team and was still as new after that when they took it apart. I had the valves "checked" ha ha, which means they started it and it didn't stall and then they wound up the motor near redline and it didn't miss a beat. It does one or the other when out of spec. Or it is obviously noisy.