Here's why:
* Compression Varies: Compression ratios, and therefore compression pressure (measured in PSI), can vary depending on the specific engine build, modifications, and wear and tear.
* No Single Standard: There isn't a single "standard" compression number for all 1340 Evolution engines. Even stock engines can have slight variations.
* Foot-pounds vs. PSI: Compression is typically measured in PSI (pounds per square inch), not foot-pounds. Foot-pounds are a measure of torque, which is a different parameter.
How to Find the Information:
1. Consult your Service Manual: The best source for this information is the specific service manual for your 1340 Evolution engine.
2. Contact a Harley Davidson Mechanic: A qualified mechanic can perform a compression test on your engine to provide an accurate reading.
3. Research Online: You might find some general ranges for compression on forums or websites dedicated to Harley Davidson motorcycles, but remember that these are not substitutes for a proper measurement.
Remember: Compression is a crucial indicator of engine health. If you are concerned about your engine's compression, it's best to consult a professional mechanic for a diagnosis and repair.
