I have on 05 XB9SX with 6800 miles.A while back I was riding and it just died. I was able to limp it home one one cylinder. I replaced the spark plugs which helped for about 3 minutes. After discussing it with a Buell mechanic friend I replaced the fuel pump, battery, and front fuel injector. Bike ran great for 2 days, but went for a ride tonight and it did the same thing. I got it started and it ran really rough, but after driving down the road, the front cylinder picked back up and the bike ran great again. Any ideas? sorry for the long post.