Revtech 110 ON custom bike not sportster blowing oil through the carb

Got oil running down frontmotor looks like it coming from the top of motoer like may be the covers but I told it puts out blu smoke changing gears it a revteck 100 cc

Your RevTech engine is a copy of an H-D Evolution engine. Just as with the Harley engine, it vents it's crankcase pressure through ports in the heads. There are "umbrella valves" made of rubber in the center section of the rocker box covers. These valves are made of a rubber like material and they will harden with repeated heating and cooling. If they get hard enough, they may not work as well as they should. This system does a fair job of removing the oil mist from the exhausted air but there is still some oil left in it. This oil will accumulate in the breather and drip out. You must clean the inside of the air breather occasionally to prevent this. However, if too much oil is coming out, you may have too much blow by on the rings or your breather gear in the cam chest may not be doing as it should. Harley uses a plastic breather gear and I've seen them break a tooth and stop turning. I don't know if RevTech uses a plastic gear or a metal gear. It depends on how much oil is coming out of the breather as to whether or not you have a problem. There are kits available aftermarket to reroute this vented air pressure outside of the air cleaner.

Good Luck
Steve