Hi,
My son recently bought a 1979 sportster it was running great. Then all of the sudden it started jerking in 4th gear I'm a Panhead rider and have not had much experience with Sportster could someone stear me in the right direction. I was thinking it might be a bent shifting fork would appreciate any help. My kid says it runs smooth till you go into 4th gear then it starts jerking like it's trying to jump out of gear.