blaster problems put new top end i need help

Yea I had my motor lock on me before. I was riding and it all the sudden lock up on me. I went to start it and it was really hard to kick it over so I brought it back home took off the topend and was able to save it but my compesion isn't as good as it use to be. lol
 
thanks guys,but unfortunatly i fried my motor again!i took it out to see if i can fix it with jetting.after i let it warm up i went for a little 5 minute ride and when i let off the throttle it just died and wouldn start the compression was really low so i didnt wanna run it and mess something up. so were gonne have it rebuilt and put up for sale =(