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 Graves MotoGP exhaust system without a fuel programmer, a stock style K&N air filter and it is unknown for how many miles the engine has been in this modified condition. This video is intended for the intermediate to advanced mechanic who is stuck on a certain procedure, or needs clarification on a dimension, tolerance, or who is looking for a possible solution for quick troubleshooting/ diagnosing. This type of service is not recommended for beginners. Performing a valve adjustment with the engine installed is roughly a 5-6 hour job straight for a "pro" motorcycle mechanic, if you only have to adjust the valve once. Sometimes when the valves are excessively worn, or a valve adjustment service is past due, the valves may have elongated to a point were the smallest shim will still not yield sufficient valve clearance, and you may have to repeat the valve adjustment procedure twice or overhaul the top-end. This job requires removal of the following items before the valve train can be adjusted: drivers seat, fuel tank, side fairing, under fairing, air box assembly, throttle body assembly, radiator assembly, thermostat housing assembly, throttle cable disconnection, various electrical connection removal, coolant flush.
Compression Specifications: Minimum (192 P.S.I.), Standard (206 P.S.I), Maximum (213 P.S.I), difference between any cylinder should not exceed 1 Bar or 14.5 P.S.I. Not liable for incorrect assembly/procedures/acts of god.

Видео Yamaha R1 Valve Adjustment & Compression Test канала Quantum Motor Works