Yamaha R1 Valve Adjustment & Compression Test

This is a complete review of procedures required to perform a compression test and valve adjustment on the 2002 - 2003 Yamaha YZF- R1. These service procedures are intended to be performed while the engine is installed inside the chassis, which may differ from a “bench test“ style valve adjustment. This machine has 48, 678 well maintained miles. The valve clearances appear to be original from the factory and were all within specification, although the majority were at tightest limit. This bike has a full G