I need help and guidance to repair my bike Suzuki Sprinter ECO 2007

My motorcycle suddenly stop functioning when I was on drive. I chowed it to mechanic. one of them checked it and told that it doesn't generate current for ignition. He checked the wiring and couldn't find the fault. The fault occurred two months ago in Punjab Colony. I left my bike to a mechanic. He resolved my bike next day and called me. He didn't tell me anything about the fault and diagnostics. Same fault again occurred. Can anyone guide me about it??

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