I've got a 2015 WR that is starting to blow smoke from the pipe. it's got about 150 hours and has never had engine open/valves checked. it still runs great and starts without any issues. My question is, if this is a ring issue and I have to open the engine, what else should I do? Is there a new piston design that I should install? Today, I rode a 2017 KTM 250 XCF and it has noticeably more power. I want that. I've already got an FMF pipe and GYTR computer with a very strong tune. Any help or suggestions would be appreciated. thanks. Edited November 12, 2017 by Tony T added more info.