I think he may just be
trying to point out that he has looked after the bike properly since having it, in fact the present problem may or may not have anything to do with him, it may date back to the previous owner, certainly the previous owner of my Aprilia had managed to seize it up on a number of occasions (at least partly) judging by the damage to the piston (but that was a much older model)
The smoking can be from a few different causes of course, as said a build up of oil from low speed running, particularly if oil pump setting is wrong, wrong type of oil, sucking oil through the crankshaft seal from the clutch side (gearbox oil) into the crankcase where it gets mixed up with the petrol and injected oil and therefore too much oil, causing smoking. It's even possible for the seal to between the two crankcase halves to be defective, particularly if the engine has been stripped/split and rebuilt, some bikes have a gasket between, some have just gasket sealant, all need a good mating surface free of blemishes and damage between the two, any small gap can let oil in from the gearbox or air from the outside. Aprilia have in the past recommended adding oil to the fuel in the tank when setting the oil pump, to ensure the engine has oil in the meantime, at other times it should be just straight fuel, has he changed garage where he fills up? contamination in fuel? Diesel in storage tank at garage before the petrol?
Aarron, can you post more exact history of the bike? servicing repairs/rebuilds etc. it's possible there is a balancer shaft in the engine, but it's a bit unusual on a small two stroke. Also could you post a link to the thread about a similar problem?