Quick question on Jog90 build

[liftit]

I've sourced a jog90 case from an atv that is just the case and crank. I've read 90Gtvert's conversion post so I know that the stator and such from a 50 will work. But will the cvt parts from a 50 work? I saw the pic where the contra springs were different sizes. I have a donor 50, so I was wondering if it all fit as long as the splines were right, or if the 90 stuff was just bigger in general.

Also, off topic. Anyone ever do a 2 to 4 stroke conversion? I know the mounts will need work and and new ignition control stuff is needed. Is it pretty much wiring after that, or is that pretty similar? Just wondering because a new 150cc with carb, cdi, and coil is less than a 2 stroke 90. Just playing with ideas

[90GTVert]

If the 50 is the large spline 50, the CVT parts should work. 90cc contra springs are the same diameter and will fit, they are just stiffer than a stock 49cc contra.