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Mohawk · December 27th, 2023, 05:49 AM

I think you have a poor understanding of engine manufacturing. It is NOT 100% accurate, hence things like valve clearances have to be set for every valve. The engine does not need to run. They are set on a build bench when the head is built up as a sub assembly. Which then goes to the engine assembly line. The engine is only run once the bike is complete & gets its post assembly systems check.

Engines are run by the manufacturer on a dyno & given real world duty cycles. They're stopped & inspected after various mileages to determine the maintenance schedules for various components, like valve clearances etc.

So as previously stated every valve has an individual shim size that was correct when the head was assembled. Follow the recommended process to set your clearances correctly.

Have fun.

December 27th, 2023, 05:49 AM	#4
Mohawk ninjette.org guru Name: Chris Location: Bristol, UK Join Date: Feb 2016 Motorcycle(s): ZZR250, VFR800 Posts: 478	I think you have a poor understanding of engine manufacturing. It is NOT 100% accurate, hence things like valve clearances have to be set for every valve. The engine does not need to run. They are set on a build bench when the head is built up as a sub assembly. Which then goes to the engine assembly line. The engine is only run once the bike is complete & gets its post assembly systems check. Engines are run by the manufacturer on a dyno & given real world duty cycles. They're stopped & inspected after various mileages to determine the maintenance schedules for various components, like valve clearances etc. So as previously stated every valve has an individual shim size that was correct when the head was assembled. Follow the recommended process to set your clearances correctly. Have fun.