down shifting is not bad at all... as long as your are downshifting properly and not trying to drop more than one gear at a time or dropping a gear, popping the clutch and redlining then, it's fine... when you're slowing down, squeeze the clutch, down shift, and slowly release the clutch... if you just let it go then yes it can be bad
Yes, always use your clutch for any kind of shifting
Shifting up or down is directly related to the rpm. of the motor. It will vary with the motorcycle motor size.
Bad Throttle Position Sensor
1 down 3 up if newer than 1986 85 and 86 1 down and 4 up with neutral between 1st and 2nd on all models
It depends on the motorcycle. I have a 96 buell s2t and ideal shifting rpm is about 4000. anywhere before the red on your tac
No
not shifting
It is bad for your neighbors.
Down shifting means
You set it down.
Vaccuum valves bad
Loosen the clamp bolts on the cable. If it is shifting down to a lower gear when the throttle is at max it is all right. If it is shifting down too early, lengthen the cable adjustment. If it is shifting down too late or not at all shorten the cable adjustment.