zx/crf50 cam install-stock motor

Im looking for a bit more power on my stock xr50. I dont want some rediculous 88cc kit. we have pit bike races and its way more fun when we all have the same basic bike. will i be able to install a stage one or stage two cam without any issues? ive seen these cams give .5-1hp. BBR or HotCams is preferred.

THIS CAM works well with a stock head, you won't need HD springs with it
THIS CAM works well with a stock head, you won't need HD springs with it

Thanks for the info. Jake

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