so i read the stock settings for suspension is 140 lbs. and that is how much i weigh, however i sometimes like to make hard turns.
my question is should i leave everything as stock settings or adjust the preload and other things?

 

I weigh about 135 and took mine in because I thought mine was too hard but it ended up being too soft. I would have someone check all the measurements and set it accordingly.

 

Where ever your reading that the suspension is set for 140lbs, stop reading there. The front is sprung for a 105lbs rider and the rear for 180lbs or so. If the suspension wasn't ment to be adjusted then they wouldn't build in adjustments [like on cars]. Either way stock is never, ever ideal for anyone.

 

Hmmm..i have rebuild my end (change the liquid and gas),and its feel like new
Now i found a factory who make for me a own spring for my weight(93kg bone stock )
Somewhere i reed too,that the japan motors make/calibrate suspension for the 75-80 kg rider...