I was wondering what a rev limiter does and if it makes that much of a difference
if so where can i get one

right now my bike is tied with the 400ex what can i do to beat it/ we raced many times of straight always tied

1988 250x
80mm big bore kit
ported and polished
34mm mikuni flat slide
FMF mega max pipe
uni air filter
14 tooth front sprocket (really helped )
13:1 compression
holeshat tires
vp race fuel
lone star axle carrier
race cut finders
ac nerf bars
pro kill switch
fly handle bars
ac grab bar
new cam chain
new cam sprocket

please help THANKS