Motor knocking?

[Bstrang]

When me blaster is running it sounds like lifter knock, i dont know if 2strokes sound like that or not.

 

[Racer51]

You need to drainthe fuel and make some fresh batch. Use gas with an octane rating of no less than 90 and a premium premix oil. Something amsoil probably dominator, it comes in a red bottle for like 11 bucks a quart kinda cheap use that and I'll bet it stops knocking then good luckI:I

 

[Surfrjag]

blaster motors are a little noisy but if its loud and distinct you may have a problem. it could be piston slap from normal wear. whats a compression test read?

 

[Bstrang]

Thanx, I think I found the prob. My exhaust wasnt buttoned up to the manifold very tight Im pretty sure it was knocking there. I still need to tighten them up and see if it stops. Thanx again for your help.