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I recently rebuilt a 88 blaster with Vito’s 3mm stroker crank and a Chinese top end, my blaster started making a rattling noise after about 3 hours and I thought something came loose under the clutch cover, nope I took it all apart and put it back together, I then thought it was piston slap and...

It makes a pinging noise in the expansion chamber At idle and I’m not sure if this is normal for a blaster. It does not have the same normal 2 stroke ping as other bikes, it’s a lot deeper. And when I’m on the throttle, about 1/4 and below (idle jet) it is always sounding very deep and poppy...