I may be wrong, but a lot of top notch guys that are goodengine men have been working with this engine to get what few bugs are left ...cured. This is because the DLE 30cc engine is about the most powerfull engine around in a very light package. I have grow to love my engine. It has amazing power and I think one of the best China made 30cc engines. I will have a Frank Boman ring in it on next run...cannot wait to see that low idle it should have. Take Care & Best Regards Capt,n