Contrary to popular opinion, you can't just bolt a variator onto a 50L to turn it into an optimally running 50V.
A few of the differences between the 50L and 50V models are (for those interested in converting):
- Rear (wheel) sprocket tooth count (L=44 V=54)
- Front (pulley) Sprocket tooth count (L=13 V=11)
- Chain length (approx. L=92 V=104)
- Belt tension spring (V spring is much stiffer)
- Spring retaining clip (V has a longer hook)
Add to that list, the lever on the driven pulley, it’s a different shape and the gear engagement gap is much deeper on the 50V version.
There are probably more differences, but these are all I've noticed so far. . .
- (This is based on comparison of a 1977 50L to a 1978 50V)