Originally Posted by
ARGOJIM
I would recommend a 4 stroke for general putting with less tuning, as far as working easy it would mainly depend on the high rpm of the Villiers to start with as if it were only 4,000 rpm, the torque of the 4 stroke would probably out propel it and near top speed. Also to be considered is the drive system, does that use a cvt clutch setup or is it a friction type drive?
Mostly are you looking for originality? If so I would check vintage sled sites for a villiers specialist, maybe up there somewhere on a sled forum or facebook page.