I just replaced the rear shock on my daughter's CRF230F with a Works Performance shock. I am in the process of installing the Race Tech valve emulators in the front forks but have some questions about setup. 1) I am planning on using the stock springs. My daughter weighs about 155-160 lbs with gear and is an intermediate level rider. She can ride just about anything, but she is very mellow and doesn't take the rough stuff real fast. The preload measurement with the stock spring is within the spec of the emulator instructions. Any problem with using the stock springs? 2) What weight fork oil should I use? I have some 5W and 15W, but think I need something inbetween. Should I try a 50/50 mix to get 10W? Or should I buy some new oil? If so, what viscosity? 3) How much oil should I put in? I would prefer a measurement from the top of the fork rather than volume. Thanks.