Doc, Is that a GSX of some type? I had a Suzuki GSX 1000 given to me....had compression (150 psi), and good spark on all four...#1, just would not pop...The pipe would get hot initially, then go cold...Baffled me and everyone else...The only cylinder I have EVER seen that had compression, spark, and fuel, but would not pop...Eventually gave it away, but was really strong on the other 3 cylinders...Glad to have ya...