Mat all of the K-Stars & DMP's, Ive checked and reported had 166 to 168 degrees on the exhaust.
How did you get 148 deg's on a K-Star?
And that cheapokit has a 178 deg's of exhaust timing?
That much EX port timing will kill the power under 5,000 RPM's
How much blow down dose the cheep kit have ?? deg's