Hesitancy, seems weird
Hey guys, I'm back with a new question. I noticed my bike is starting to act a little weird. In the past, I used to accelerate from first, shift at 4,000 which drops the rpms to around 3,000, and would often cruise in the city around 3,000 - 3,500 rpms. Now let me tell you what is happening.
I accellerate in first gear. Sudden or gradual, no problems. Upon reaching around 4,000 rpms, I shift to second. RPMs drop to around 3,000 for a moment but rise as I accelerate. 4,000 RPMs is reached again with no trouble and I shift again. Engine drops to 3,000 RPMs. I continue to accelerate. The bike reaches 40 mph at 4,000 RPMs or so in 3rd gear. I shift to 4rth gear. Engine drops to 3,000 rpms. At this poing, if I try to accelerate, the bike starts to "jerK" or "surge" or something, and you can hear the engine bog down a bit. If you try to go up even the slightest hill, or have a bit of a wind, you not only won't accelerate, but you might even slow down. You can roll on full throttle but it only feels worse and starts to bog down more.
If you downshift back to 3rd, the bike will continue to accelerate. If once you reach about 5,000 RPMs, you shift back to fourth, the rpms drop to 4,000, and the hesitancy is mostly gone, and it goes away as engine speed increases. Whats the problem? Like I said, I have no trouble with this in gears 1, 2 & 3. Idle is good and strong, with no problems there. I have not really looked to see what happens when I try to shift to 5th at 3,000 RPMs. This problem has come in sort of recently. Nothing was done to the bike, e.i. I didn't modfy anything, do anything, no accidents etc since before the problem showed itself to after it came up. I checked fluids and it all seems good. Can anyone help me?