I was at a stop light ready to race my friend and all of a sudden the light turns green and it pops out of first gear.I was reving pretty high then when i released the clutch it popped out of 1st gear.This happened to me twice in the last week.What can be causing this.My new Clutch Brass Button clutch has been in for a month and about 1000klm into it!!!

 

It sounds like that clutch is not installed right. I've had my aftermarket kevlar/carbon clutch for 15,000 miles and have never had it pop out of gear on me.