I'm hoping someone might be able to give me an idea what's happening with my '08 GL1800 before I take it to the dealer. I hate to go in cold and tell them, "it aint right, please fix it." One never knows what will happen.
Here's the scenario. The last couple of times I've been out I've noticed a repeating slight bump or thump on the right side. It seems to be coming from underneath the bike like perhaps the exhaust. I don't so much hear it as feel it through my right foot. It is more pronounced with my feet on the highway pegs, but I also feel through the normal pegs.
Now here's the kicker. It only happens in 5th gear. Speed and accel/decel seems to be irrelevant. It's not regular, it happens randomly every few seconds to a minute. Overall performance seems fine, although gas mileage may be down. I haven't had a chance to check yet.
It almost seems like one cylinder misfiring or backfiring although there is no "bang" from the pipes.