* Engine Variations: There were likely multiple variations of the Bravo 250 engine produced in 1982. Each variation might have slightly different compression specs.
* Maintenance History: Compression can be affected by the condition of the engine, its maintenance history (like valve adjustments), and wear on internal components.
* Factory Specifications: The most accurate compression specification will be found in your Yamaha service manual for the specific model year and engine.
Here's what I recommend:
1. Find Your Specific Model: Get the exact model number for your 1982 Yamaha Bravo 250. This will help you find the correct service manual.
2. Consult the Service Manual: The Yamaha service manual will have the recommended compression specs for your engine.
3. Professional Mechanic: If you're unsure about working on your engine, consult a qualified Yamaha mechanic. They can perform a compression test and advise you on the health of your engine.
Important Notes:
* Compression Testing: A compression test measures how much pressure your engine cylinders can hold when the piston is at the top of its stroke. A low compression reading can indicate problems like worn rings, valve issues, or head gasket leaks.
* Safety First: Working on an engine can be dangerous. Always follow proper safety procedures, wear appropriate protective gear, and consult your service manual for detailed instructions.
