This is the six spring T140 KTM clutch that I just assembled. The chainwheel runs on a double row bearing so it will not wobble around when the pressure plate is lifted. Yamaha basket cushions (readily available from Barnett), set of KTM 450 plates, needle bearing lifter.
After I test this I will finish the Belleville spring version. Uses more KTM parts so less machining cost. Interestingly, the KTM uses an aluminum hub with multi-splines. The typical Japanese clutch has a steel insert in the hub. However, the trade off of making a new mainshaft with multi-splines for the clutch out weighs the cost of making the steel hub with the keyway.
The unused ring outside the sprocket teeth was for the starter gear but since everyone disliked the change it required to the primary cover I dropped it.