23-12-2019, 08:38 PM
The problem here is that Specialloid pistons used metric width rings. The vast majority of other brands both back in the day and of current manufacture use imperial width, which are consequently much easier to source.
It might well be easier and cheaper in the long run to change the pistons complete rather than trying to locate and pay a premium for metric width rings. An even more economical solution might be to get hold of a good used set of 040 pistons with imperial grooves (Hepolite for instance), of which there are probably plenty about to be had quite cheaply, and if necessary fit them with new rings which are relatively easy to obtain. If going down that route just make sure they are the 4 ring split skirt type, not the long obsolete 3 ring variety.
It might well be easier and cheaper in the long run to change the pistons complete rather than trying to locate and pay a premium for metric width rings. An even more economical solution might be to get hold of a good used set of 040 pistons with imperial grooves (Hepolite for instance), of which there are probably plenty about to be had quite cheaply, and if necessary fit them with new rings which are relatively easy to obtain. If going down that route just make sure they are the 4 ring split skirt type, not the long obsolete 3 ring variety.