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[superpan74]

Hello,
My name is Antonio recently i bought a classic 500 efi stealth black 2018 model.
I have only 350Km and the battery after three four days is dead.
I change the battery with a new one but i didn't solve the problem.
Then i realized that the problem was battery charging when the engine was on
Please investigate the matter and let me have your early reply.
Thanks & best regards

[stinkwheel]

I would take it back to where you bought it. If it's a 2018 model, it ought to still be under warranty if it was sold less than a year ago? As far as I know, the battery would ordinarily be the only part of the charging system not covered by a warranty.

Even if it's outside the manufacturers warranty, if you bought it from a dealer recently, I'd take it back to them.

[OliverMatt]

It's can be faulty voltage regulator. Try to check all the connections from the regulator to the alternator to make sure that they are in a good condition.