Original sentence: For example, the Yamaha YZF-R6 has a redline of about 17000 rpm.Higher yet is the redline of a modern Formula One car
Edited sentence: (Yamaha heavily advertised the engine as having a 17,500 rpm redline, though for reasons of marketing and/or tachometer error.)  Higher yet is the redline of a modern Formula One car.For example, the Yamaha YZF-R6 has a redline of about 16,200 rpm.The engine was not actually capable of that speed