Battery charger readings are based on voltage not battery amp capacity when under a loaded ie when you engage the starter.
Based on your description remove the battery cover and check to confirm the cable connections/terminals at the battery are not corroded and tight.
If the terminal connections are ok then check the battery voltage with a multimeter.
A good battery will sit around 12.6 to 12.8 volts when fully charged(again does not verify amp capacity)
Assuming the bike will not start watch the mutimeter set to volts when you engage the starter.
If the starter is cranking the voltage will drop to around 9.6 to 10.5 and return to about 12.6 when you release the started button. If the starter or relay just klunks or clicks verify the battery voltage drop with the starter button pressed.
Voltage drops below 9.6 may indicate a bad cell in a battery or a bad connection hopefully eliminated. Battery failures can be spontaneous regardless of age but if more that 3 years old can be an end of life factor. The diagnostic flow charts branches off from here but I would start with this.
Based on your description remove the battery cover and check to confirm the cable connections/terminals at the battery are not corroded and tight.
If the terminal connections are ok then check the battery voltage with a multimeter.
A good battery will sit around 12.6 to 12.8 volts when fully charged(again does not verify amp capacity)
Assuming the bike will not start watch the mutimeter set to volts when you engage the starter.
If the starter is cranking the voltage will drop to around 9.6 to 10.5 and return to about 12.6 when you release the started button. If the starter or relay just klunks or clicks verify the battery voltage drop with the starter button pressed.
Voltage drops below 9.6 may indicate a bad cell in a battery or a bad connection hopefully eliminated. Battery failures can be spontaneous regardless of age but if more that 3 years old can be an end of life factor. The diagnostic flow charts branches off from here but I would start with this.
