I Probly only raised exhaust 2 degrees, mostly to smooth out the port and sleeve transition. I took a good amount out of lowers and definitely the secondary’s to improve entry.
Didn’t buy any of it as a kit, just been adding to it over the years.
As far as I know, each engine isn’t always the same on what timing they like. Mine though likes +2°. I don’t think there is any disadvantages Sent from my iPhone using Tapatalk