The engine sounds like it is knocking can you tell me whats wrong with it?

well for one your link dont work. second blaster engines sound like they have a slight knock. if its more severve may be a ping from an airleak or worse yet some piston slap... get the link working and we will let you know
 
possibilities:

detonation, piston slap, big end bearing going out.


or just the standard blaster rattle
 
whatever you tried posting up it didn't work, i'm not sure if that's a movie or a sound clip or what but it didn't work, with out even hearing it i have to ask when was the last rebuild, to what extent was it rebuilt, what do you have done to the quad, and is it jetted correctly? just a couple questions that'll be helpful answering your question, the more specific you are the easier it is to help you, which we're more than happy to do here on blasterforum :)
 
here is tjsdanames blaster.. you can hear his motor rattling...


random blaster rattle


another randomrattling


random rattle


i think you get my point... there noisey
 
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I have been working on this blaster a little bit. It had a air leak and the carb was all messed up and bad throttle cable. Got all that fixed and idling right but then noticed the rattle. I have never heard one this loud and thought maybe it was the bearings but wasnt sure. its all stock except no toil air filter and oil block off. running amsoil mixed at 40 to 1 and its getting 120psi. i think the guy he got it from said it was bored 40 over but its hard to tell the guy was pretty clueless on everything else
 
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Guys calm down. They r air cooled 2 strokes they r noisy. All those vids fed posted were of blasters tht were running perfectly fine
 
Guys calm down. They r air cooled 2 strokes they r noisy. All those vids fed posted were of blasters tht were running perfectly fine
im also in the thread for a bad rod, i was worried whether my rod is bad but some guys here said i might have a bad wrist ring? my friend has a an older blaster and his doesnt tick like mine does. im might order some gaskets and take a peek in the head although IDK what exactly im looking for bc i AM a NOOB:(
 
geez i hope so. i dont think u can really hear it in the vid good tho. and the tick IS coming from the motor i guess ppl are saying its normal? some say it may be a bad wrist ring or leak but i have no leaks so idk:-/
 
the ticking could be the reeds when the motors runing stick your head by the intake you can hear the reeds ticking and its a wrist pin your talking about mine had a nasty knock awhile ago the wrist pin bearig went bad and the only way to tell if you have a leak is a leak down test with i asume you havent done