Suzuki 2 Strokes

I replaced the front tire on my buffalo about 6 months ago, I put in a new tube and all. for some reason though the front tire is loosing air , it seems to only loose a few pounds every two weeks or so and at a rate higher than the rear . I know it is normal for some air loss but about how much is normal? should I worry about a pound or two each week? or do I have a pin hole in the tube?

That sounds like a leak for sure, check the valve stem first with some soapy water to see if its got a small issue there.