Yamaha G16 wont turn over after lift kit installed

Hubby installed lift kit and now it wont turn over. You hear a click when pressing the gas but nothing further. Before the lift we installed a new solenoid because it wouldnt start, at first it didn't work but then suddenly it started and run fine but we only used it once or twice before adding the lift. After the lift, we changed the relay switch but still nothing. Any ideas? This is a new cart for us. Only had it 1 month. BTW, I bought the relay switch used on ebay ? Could that be the problem ?

PLEASE HELP !