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CAn I say,
(a) He wears his helmet before he is riding his motorcycle now.
(b) He wears his helmet before he is riding his motorcycle every day.

Which one is correct?
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Comments  (Page 3) 
Admittedly, context will sometimes do the trick, but I don't see it working in this case. I peel the banana before I eat it. (You can only peel a banana once.) I peel a banana before I eat it every day. I peel a banana in order to eat it every day. I'm now peeling a banana in order to eat it.

I put on my helmet before I ride my motorcycle. (The relationship is fairly clear. You can only put it on once without taking it off.) I wear my helmet before I ride my motorcycle. (I'm not sure what you call this difference, but it's not an act which is "completed," like peeling a banana. Anyway, we lose the connection - the deliberation.) Every day I wear my helmet in order to ride my motorcycle. Now I'm wearing my helmet in order to ride my motorcycle. (These are closer to the original question, but as I said previously, "now" doesn't mean "this time," as the questioner would like to use it as a time marker. It means, "I formerly rode without my helmet all the time. Now I always ride with my helmet.")