only if you take off the front end

they are 7 foot long, maybe diagonal.

i had mine in one a few weeks ago pretty sure it was 6 foot, ill ask my mate and get back to u

 

my bike 883c is Length 90.30 in. (2293.62 mm)

how u get the diagonal on a 6/4 trailer? i "think" it`s 7`2" (219cm) if im right it will fit... maybe.. but im proly wrong on my calc

http://www.hdforums.com.au/Default.aspx?tabid=71&forumid=1&postid=484866&view=topic

Check out the above thread. Has pics. I think he used a 7x4 trailer corner to corner.