85-13b

I think i killed my engine on my 85 gsl-se. I was driving fine until i got the bug to use the rx to its full potential, i ripped it threw first, second, and third, when i went to take fourth it didnt want to catch so i slammed it down only to realize that i had slammed it to second like a fool. after hours of fooling with every part of the motor, i found out that i have no compression on one of the rotors.When it comes to rotory, im absolutly cluless, I have a better chance sticking my head up a bulls ***. can any one help me fix the problem?
THANKS in advance!!!