A couple weeks ago, i was riding and my blaster lost a whole lot of power. It doesnt have much to begin with. It was rebuilt about a week before this. It was running better than it ever ran before then it just lost all its power. When i rev it high, it sputters and cuts out a lot. It also revs a little slower than it did before. Please reply, i need some help. Im sick and tired of spending all my money on this thing and it not holding u.

 

clean airfilter?

 

I would open the engine.
When this happened to my 125KX, I opened the engine (knowing that it wasn't brand new like yours is), and saw that it almost seized (there was a nice circular hole through the nikasil...
Maybe something has been mounted wrong