Originally Posted by diesel
Yup those are indeed the xray driveshafts. But, my main concern is the number of teeth on the rear pulley...if they the same as that of the cyclone pulley.
The diff is basically an Xray diff. I took and older wide Cyclone pulley, and cut out the whole inside of it. Only a ring remained with the 39 teeth on it. It fits exactly on the Xray pulley (after some sanding). The two pieces are glued together with Loctite 3450 "Liquid alloy". You can see the original teeth of the Xray pulley on the parts' photo.
Xray driveshafts (and also axles and couplings) are used simply because cyclone outdrives do not fit into the Xray driveshaft slots. BTW, other dimensions of the driveshafts are exactly identical, you can use e.g. Xray axles with cyclone dogbones and xray couplings (or any other combination).
Xray axles are worth for a try: they are lighter (4g to 4.5g) and seem more durable than the original Cyclone ones. (xray axles have two different positions to secure driveshaft pins therefore they have two lives.