Wow that sounds really weird. I’ve never really heard of anyone shifting like that, it doesn’t seem very intuitive and it makes me wonder if its the bike and not you. You are basically saying it redlines whenever you upshift is that correct?
Also just to make sure, in your description of shifting at no point did you say that you let off the gas. Letting off the gas is a must when you pull in the clutch. As soon as you grab that clutch level you should be ready to at least EASE off the gas a smidge, but probably not cut it off entirely.
Well its either you or your bike thats doing this. If you think its your bike then I would suggest you have someone else ride it a bit and see if it happens to them. Or maybe ride someone elses bike and see if it happens when you are on their bike and not yours. By doing those two things you will find out which one is the problem, you or your technique.
If its your technique that is an easy fix and it just requires practice. I would suggest you get down shifting before you jump on a 600 because if you rev a 600 up to redline when shifting at the very least you will get quite the surge of acceleration. Hopefully it won’t wheelie, but depending on the bike and the speed it is a possibility.
I really have a feeling this is your bike though because this just doesn’t sound like a natural thing that someone would pick up as a bad habit. Have someone else with some riding experience ride your bike for you and tell you if it happens to them. Where do you live anyway? If you live in the california bay area I could probably help you out.
~Best Beginner Motorcycles Admin