power loss

Hi guys, I just hit 1000 miles on my RC today at the track. After the first couple of sessions I noticed a significant drop in power in the higher gears 5/6. If I redline 5th, then shift up to 6th it barely changes the power output. i can get up to about 78-80 in 5th and then barely manage to...

hello everyone, this issue has been bugging me since a month. okey,so my rc390(2015) engine was rebuilt last month since it broke open due to conterbalancer shaft key shearing.(complete engine newly built including case to head) after the rebuild i rode it easy for 1000 kms run in and then oil...