You might want to try this:


Manfrotto 3249B Monopod


It's not lightweight, but if you're transporting it on a motorcycle then the weight shouldn't be that much of an issue. It's also relatively inexpensive. The monopod is extremely rugged and will hold up alot of weight. I put the Bogen - Manfrotto 234 tilt head on mine and it works perfectly. The tilt head is only rated for 5.5lbs, but it held up my 50D, battery grip, and 70-200 f2.8 IS just fine.