my 87 runs like a scalded ape. Ive crushed everything Ive ever raced with it. It does have that hidden power band though somewhere in the mid range that if your not careful it will dump you quick. I was racing a atc 250r when it hit and pulled up in the air while i was passing the atc 250r. I had to let off to keep from flipping and was still looking back at the 250r. Then i raced my uncles newer yz 250 and crushed it. Well the yz was tricky. If i could hook up id crush the yz. But if i couldnt get traction the yz could take me but id catch back up once i hit third.