Every day at work I park my bike on a sidewalk-level undercover area, which means getting it up the curb. A little while back, someone set up a wooden ramp to make it easier getting up the curb.
Anyways, today I hit the ramp and I think it was not right against the curb. As my front wheel went over it, the damned thing flipped up to the sidewalk level and jammed underneath my bike. I was hung up on it, with my rear wheel in the air.
After a friendly co-worker helped me lift my bike off the stupid wooden ramp, it sounded kind of funny. damn!
I'm going to call the shop tomorrow to see if someone can take a look, but in the meantime, I was hoping some guru could lend me their expertise.
The bike sounds quite a bit louder than it used to. There's a distinct "popping" noise as I'm riding. It sounds the worst when pulling torque, around the 5000 - 7000 RPM range. In this range it's very noticeable louder.
When engine braking, in around the same RPM range (about 6000 - 4000) I can hear a quieter "pop" that didn't used to be there.
I didn't notice any degredation in performance, but I wasn't pushing it too hard either.
I observed that one of the two exhaust pipes was dented at the bottom front corner (it's a twin, 2-pipes, and no lower fairing)
I couldn't see or feel any hole at the dent. While the engine was idling, I put my hand near the dent, and also at the place where the pipe meets the engine block to see if I could feel any escaping exhaust gasses. I couldn't.
Aside from that, there's a small dent in the oil filter, and some paint transfer from the wood onto the engine casing, but that looks like it. I didn't see any oil leakage and the oil level is fine.
I'm thinking that maybe the dented exhaust pipe has messed up the back pressure and is causing the problems.
Any thoughts or input would be much appreciated.