Ok, i have a 2002 shee with a compression or 120. i am at about 500 feet(texas). My mods are reed spacers, v force reeds, 34mm mikuni carbs, two k&n filters, toomey t5s, and what i believe is a mild port. I did not install these mods unfortunately so i am not sure about the port or the last rebuild. should i rebuild. The guy i bought it from said to run race gas but compression is only 120. So where do i start? I was thinking also about getting a shaved head or cool head to raise compression just below the point of needing race gas. Thanks guys! Parker