well i can field this one.
what type of chinese products were you buying? no name ebay ones? extremely cheap ones? you find in online stores that dont know there head from their ass?
on shocks, if you stick with the better name brands like fast ace, staggs, and pitster then theres no way you should be going through them.
on the swinger same thing, stick with the better known companies on the china market like pister, ssr, G2, OGM, etc. if you do, then you wont thrash them i bet
on the zonger, most all the trannies suck on the 125 and up motors with them. you need the better china motors, jialing, gpx, yx, etc.....
hope this helps also but on my ssr, it came stock with inverted, rebound adjustable forks, once i swaped in some bel ray 20wt they preformed better than my forks on my nicer jap big bikes. there not cheap though, expect to pay around 600. there the same ones found on a pitster x2 also.
just gotta be careful what chinese crap you get, like everything theres good and bad crap coming out of their. i assume you not a newb but most all them chinese knock off shocks, swingers, and motors.
if ya got the money for the sano's and bbr then go for it, ya know you cant go wrong. but my friend who payed 6k for his bbr built 50 is a little jelous of a few of us who ride with him when out knock off bikes look nicer, and were cheaper in price, and are just as sturdy if not sturdier than his bbr bike
picture of my bikes forks for views