i have seen as high as 180-195 psi if you are 100 - 90 - 80 or less. Time to think about a rebuild, or replacemnt motor I just rebuilt a 1996 that had 80 psi
14:1 compression
120psi
60 p.s.i.
Alot.
9:1+
When good it should be around 120-125
150psi
It should have a minimum of 70 psi.
A yamaha blaster should have at least 120psi 150 is recommended
Compression anklets, socks, or long hose should NOT cause bruising. Most likely, the hose are too tight, too much compression. Talk to your doctor for a prescription for a lower compression product.
The compression specification for the 1991 Metro typically refers to the engine's compression ratio, which is approximately 9.0:1 for the standard models. This ratio indicates the engine's efficiency and power output. However, it's important to verify specific details based on the engine type, as there may be variations depending on the model and market.
150psi , per. cyl. J.H