It's actually very simple to get the bike to run on pump gas. We simply picked upsome solder as described on the RB Designs website. did a test pattern for RB to use, and he re-cuts/shapes your head and lowers the compression to allow it to run on pump gas. His turn a round was FAST! When I called RB, Ron the owner told me lots of his work is for this purpose. Cost was $75.00 plus shipping. The bike is tons more ridable now with the head and carb mods and has more bottom-mid than it did stock, Still the fastest 250 I've ever been on.