Shavings no, aluminum flecks and grit, yes. It's all true. The carb wasn't mounted when it was binding.

Tomy has an excellent product here. With tighter tolerances and better quality control he will have the replace the 50cc with twin market. He needs to have a US distributor that will inspect and run all engines before the end user get ahold of them. If Jack could do this then Tomy has what he needs. All the current engines should be flushed out before running. You'd be suprised what comes out. I need to photogragh the papertowel I used to wipe out the bowl after I flushed it the first time. I always do it twice to make sure I got it all. The twin it needs to be flushed intake down, not mount down otherwise all the grit and stuff will go into rear bearing, ask me how I know. I had to rock the crank back and forth and dunk and dunk to get it all out.