Hello, I have problem in my Bajaj Avenger 220 cruise bike when it rain

Hello, I have problem in my Bajaj Avenger 220 cruise bike when it rains. Can't ride as the bike won't start. Even if the bike starts, engine will turn off when I raise accelerator. It's not the problem of spark plug. I have changed it many times. Engine turns off in middle of road, only when I raise the accelerator and try to speed up the bike. Need support to resolve the issue.

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