Hello and my BMS Evo9 won't hold a charge!

[GMan_Scoots]

Hey gang!

First time posting and I need help. I've had my 2009 BMS Evo 9 GY6 149.7cc for about 3 years. Been almost error free since I rode it off the lot back in California. Now after a repair here in Texas, including a brand new battery, it won't hold a charge. I've been warned about this joker here in the Dallas area and I shold have gone to someone else. But at this point I'd rather pop the cover and see what his mechanic did wrong.

This will be my first attempt at a repair, other than changing the oil and a few light bulbs, so all the gentle and simple advice you can give would be appreciated!

Thanks!

G-Man