Inside of VS-B01
I had checked inside of the engine by microscope. There was a big bury in intake port. No,it’s almost fail of drilling. Almost OS engine has not bury. But are OEM productions different? Need check well. Pro driver uses same spec engine as me. But CQ level is different. It needs to shave stay for avoiding drive shaft. On this time it need protecter on exhaust and carburetor intake for avoiding powder of aluminum. The indicator displays rpm for maximum torque.