How long should I be breaking my 400EX in.(How many Gas Tanks?)Should I adjust the throttle during the break in peroid?BTW since this is such a hot topic..The 400EX's top speed is 70 mph.My friends Dad clocked his son at 70 mph on a stock 400EX.

 

dont have anything to say about the break in but your name is ridiculous. if you have a 400ex (stock) you'll get smoked by an 'R.

 

I've hung with a 250R.I usaully don't get beat by
my friends 250R its dead even.

 

Wate 3 tanks of fuel before you hammer on it, but after 1 tank you can have fun, just dont pin it for long