I was going to grab some tie downs to go with the bike lift, but noticed the cambuckle tiedowns were rated to something like 180kgs (I think)  and I was wondering if I should bother with them or go with something else?  I just wanted them for when I'm using the bike lift - or maybe transporting the bike at a later date.  I think the Sportster weigh about 300kgs (?) but the strap wouldn't be lifting the bike, just holding it in place so it sounds like the normal cambuckle strap would be ample?

 

I'm not a great fan of the rachet ones...

If you're talking about the ones I think you are then they aren't the same. I'm looking (similar) at these:
http://www.nrsweb.com/shop/product.asp?pfid=1442&src=related_items&refer=From-1440-To-1442
And you're talking (I think) about these:
http://cgi.ebay.com.au/TIE-DOWN-TRUCK-RATCHET-BUCKLE-LOADBINDER--2500KG-LC_W0QQitemZ220275575018QQcmdZViewItemQQimsxZ20080901?IMSfp=TL080901175r12253