I need help with my tav

#1
So I tested my bike yesterday and noticed that when I let off the gas It felt like the brakes engaged, but I know they didn't. It's my tav, but why? It's this normal is there a way I can prevent this from happening? Also I was told about a gold spring for the tav to increase speed I would like to go faster, but I want it smooth.someone please help.
 
#2
Gold? The Yellow one makes it so it stays in low end longer for more torque.... I dont think you get any more speed if they are functioning properly. Just adjustable as far as when it shifts frim low to high... Not much different than moving the position of the 3 holes.
 
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