http://www.youtube.com/watch?v=zPMCsPdro6U
composimo
interesting...........
they also have the gy6 carb riser for 30$
http://www.composimo.com/GY6-_c_8.html
just came across this today and was wondering peoples thoughts on that 5 speed
oh and if you know of any other source for gy6 manifold risers