Honda ATV Forum banner
top end rebuild
1-1 of 1 Results
  1. Repair & Maintenance
    Hey, decided to start this cause these forums helped me along the way on my rebuild. I just rebuilt the top end on my 400ex and it runs a ton better now, only problem is that it’s smoking from the exhaust port on the new head I replaced. I’m thinking it’s because of the old crushed exhaust rings...
1-1 of 1 Results
Top