The red wire is meant to be inside the tank, so i think it'll be OK, also the wire is routed such that it will not touch any metal, should be fine. Even though it's easy enough to fix later if needed. O-ring: I i just added fuel resistant sealant. Today i installed a li-ion battery, hopefully it's lifespan is better than the AMG I had, it only lasted 2 seasons. Did a shake down ride, 15miles, no complaints, but need to advance timing a bit, is a bit weak at higher rpms.