i know how you feel.
nothing worse than getting all excited and then push home, redfaced, all sweated up cus the thing hasnt started. all too familiar. the lack of power is invariably proportional to the number of spectators
im in no way inclined to argue. im just saying that some companies do have reputations etc to keep, and only supply completely traceable parts. the bolts(or screws) used in a boeing airliner are all certified and can be tracked down to the guy who was operating the machine at the time they were made. liveas are at stake. millions, if not billions of dollars. rolls royce went broke cus they were stingy with the frozen geese. frozen poultry into turbines makes for broken engines. broken engines mean falling planes, mean lots of liability. they didnt test the engines thoroughly enough before commencing production. oops.
whereas mass produced cheap-ass engines for bikes that are easier and cheaper to replace than work on, just dont share the same characteristics. liability. insurance. that makes a major difference. they may have a QC sticker but who signed that sticker? some guy that was fired after two days? etc. do you think he was worried that the piston was 0.5mm undersize? or the shaft was running eccentric? not in the slightest.
i worked in a hardware once. when someone came in with a warranty claim on something sold 15 years ago (treated outdoor pine having a 20-25 year guarantee) we didnt bother trying to find evidence in the (literally) rats nest of old receipts and paper work. we just honoured the warranty. for all we knew, they could have just been a random, trying to rip us off.
ive had several bank accounts go missing. thats a fair sum of cash. all having been created before the advent of computer systems, i get this response "we have no records of that account". so why do i have an account book stating theres 2000 in this account you have no evidence of?
i also apologise as well
.
there is a big learning curve with these kits if you havent spent the last ten years fiddling with motors and the like. and im sorry you were one of the ones to have a bad time with it
theyre worth it eventually!