At 2200 miles on my 09 TE310 I took it to a dealer for what turned out to be a bad cam bearing. I had them do a full service at the same time since it didn't cost much extra. Prior to the bearing making noise it ran great especially with the JD jetting tuner installed. After getting it back from the dealer it now feels noticeably gutless at lower RPMs. It won't even power wheelie in 1st anymore unless I hold in the clutch for a moment to let the engine rev up. Other than that, it's running really well. Unfortunately, it feels similar to a tooth being added to the counter sprocket resulting in a boggy feeling off the line. Adjusting the JD tuner doesn't help much. I'm fairly certain they adjusted the TPS but I don't know what else they did that would impact performance. I'm planning to call the dealership and ask them but... I was hoping to get feedback from the forum first. Thanks.