Street Bike Riding Gear

ok I get that I could not use the Kevlar jacket and jeans, but could I use my boots and helmet instead of buying them for dirt bike? My boots are Alpinestars - S-MX R Boots ventilated, and my helmet is a Bell - Headset Star.

You can use it, but it is certainly not recommended. street gear is more to stop the damage caused by the asphalt and scratches and can be ruined by dirt.

you can ... I wouldnt recommend it.
These are two different things for a reason.
you should get rid pants well.

Yes, you can use if you want.

It depends a bit if you're going to try some tricks on the bike off-road, if you are, you probably want to get dirtbike gear ..

But if you're just going to rise, then you can probably do it. I get a deflector and a helmet designed for dirt but.

I do not want. Ya looks like a goon if you go to a track. Plus you have to realize the machine is totally different for the two sports ... I do not know the man ... I really want to take some gear MX or you'll look ridiculous ... not to mention burning, as well as boots, helmet, etc. are all set up for different things.
I'll put it this way ... Would you wear your orders on a mx bike road .... nope. ;)