Okay so a few months ago i rebuilt my blaster top end. I had the cylinder bored to 67.5 and hones and chamfered. I put in a new wrist pin bearing, and a new piston kit from pro x. My bike has stock jetting and everything stock except it obviously is bored to 67.5, it has tors and parking brake delete, it has vitos reeds and it has oil injection delete. Anyways, the top end lasted less than 5 hours before it started to act weird and was getting hung up and bogging when full throttle. I tore the top end off, and my piston and cylinder had these nasty looking scuff marks on the sides. I took the cylinder to a machine shop and had them hone out the wear marks, and they said it was still exactly 67.5, so i ordered a wiseco 67.5 piston, and again rebuilt the top end. (No up and down play in the crank by the way). I switched from cheap 2 cycle oil from auto parts store to klotz benol 32:1 with 93 octane. I did my 3 heat cycles, and when i ride it, it runs good in first gear and neutral but in second and 3rd, it bogs and gets hung up. What could it be? I did a leak down test and no leaks.