Motor knocking

[kbarry56]

I just installed a new motor in a bike. this is my first time doing this. when i got it running at high RPMs there was a knocking noise coming from the motor. any ideas what this would be from and if it will go away.
Thanks

 

[Sidewinder Jerry]

It would gel to know what kind of motor you have.

 

[MikeJ]

Just a heads-up... Breaking in most motors usually involve limiting your RPM for a few tanks of fuel. High RPMs are generally avoided for a new engine. Give the rings and bearings time to seat and wear down microscopic rough edges. Properly broken in, any engine will be more reliable.

 

[geebt48cc]

True Mike, welcome to the "CHINA WORLD!" These little HT's do have a few interesting sounds during break in. Uno, just go easy first few hundred miles................(Always vary speed also)