Engine is knocking

LogStol88

New Member
Oct 20, 2016
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I have 120psi of compression and my engine is making a tick noise. Why would this be happening I just got the blaster and I have been building it back up. I'm going to try premium gas to see if that will help. Any other ideas? I do not know when or if it has ever had a rebuilt piston so that must be the next step. Thanks
 
shouldn't need premium gas for 120psi compression.

at what throttle opening is it making this sound ?
jetted correctly and plug chopped for main jet ?

leakdown tested ?
an air leak or exhaust leak sometimes sounds like a tick