How many miles on the engine? I think my Avenger may have a dead cylinder (#4 exhaust pipe is cold). Doesn't sound like an easy fix. It may be worth it for me to get it from you, and do a swap.
Let me do some diagnosis and see if I can figure out what the problem is. I'll follow up in a few.
Luke M
Used to have a 1979 CB750L, sold it as a parts bike, now riding a slightly modified 1984 VT700C. Network/Field Engineer. Central OH, USA, Earth, Sol System, Milky Way Galaxy, Universe.