Well, on the new bike I got I removed the fattys and put the PT mids on, put on the Noss head with 21 cc domes, installed the 2 stage reeds,k+n pods, and bumped the timing up 4 degrees. It had 250 mains and I put 280's in for a starting point. Do you think it will be safe to try these or should I bump it up more? Cylinders are not ported and im at 1400 ft, 55 degrees.