[gzrider]

I have that happen too, the rear locks up ,especialy in the rain, maby cuz i am scared to use the front as much when its wet, dont want the front to lock and slam down i had that happen on a 50 cc scooter, now i'm in scared on rainy days. i droped the rear tire pressure some and it reduced the rear lock-up, and fugured i need to increase the front brake pressure while slowing in the rain , i wasnt sure if it was the bike or my braking technique needed improvement.