800 motor: M800 = S2R800 motor?

[junior varsity]

my other other thought is boomtubes. seems pretty straightforward and avoids interference with other setups.

[stopintime]

my other other thought is boomtubes. seems pretty straightforward and avoids interference with other setups.

Make your own exbox carbon fiber box. Should sound ok.

[brad black]

800 is the same dimensions as 400, 600, 620, 695 and 750, meaning that the cylinders are shorter than the 900. 

you can jam a 900 system onto a small motor, but you have to bend the headers "in" to fit the ports.  or you have to "stretch" a small motor exhaust to fit a 900.  if the small motor system has a slip joint of sorts then it's easy.  ports are the same shape, just further away from the crank.

not sure how much, but get some small motor inlet manifolds and 900 manifolds side by side.  the long carby ones show it well.  small motor are straight off the heads, 900 dogleg down toward the centre of the v.