Hi (newbie question) how heavy??

[jeggo]

hi for my sins I have just bought a jago jeep chassis and body. I need to build it up very light so I can drive it on my b1 licence 550kg/1200ish.

but I have no Idea what a "standard Build" weighs .

any one had theirs on a weighbridge?
tried the owners club forum but although registered I cant log on