its wierd, i didnt have any problems with the stock shifter, but i just installed some sato rearsets about a week ago and i seem to keep accidentally downshifting....... i will have my foot on top of the peg and when i reach down to upshift my big ass foot barely catches the edge of the shifter and it clicks down a gear
i think its more of a training issue to train my foot to just go out a little bit more
and i wouldnt be worried too much, if it just did it under normal riding, but once i did it while at about 9k rpm and overrevved the crap out of it
luckily nothing broke its been riding fine since then but i would like for it to quit happening........... maybe lowering the shifter position a little more? its already at a pretty decent angle, maybe a little lower than stock postition
happens every now and again when my foot gets lazy. Turning your foot out is not the answer, because then you are more likely to scrape it when turning. Need to put the ball of your foot on the peg when your not shifting.
The most important thing is to acclimate to the new peg / shifter position by finding a deserted as possible stretch of road and really concentrate on shifting up and down through as many gears as possible -- keep in mind you are not wringing it's neck, just training your brain to know where everything is and what moves are required to shift properly. Remember to return your foot to it's normal riding position between each shift, since that's where the difficulty lies.
Also, raise the shifter to make putting your foot under it as easy as possible: as you have already found out, downshifts are much easier to do accidentally than upshifts.
You may want to consider switching to a reversed shift (called "GP shift") pattern sometime in the future. It only takes a couple minutes to do by moving the shift arm 1 tooth less than 180 degrees on the shaft to point up instead of down and adjusting the height of the pedal. I have never ridden my '02 with a "normal" pattern, and in fact I first did this over 30 years ago and have converted every bike I've owned since. To me it makes shifting more positive and prevents dragging you toes on the road when upshifting during left corner exits.
Have fun acclimating!
If it has already been done, it is safe to assume it is possible to do it.
On the other hand, if it has not been done never assume it is impossible to do it.
------- Rob --------
something else to consider is your boots, if your shoe has a wide sole that sticks out that could be resolved by changing to a boot design for motorcycling or... I rode in Cowboy boots for years, before i started track riding, which i found was a good alternative because the tapper of the toe allowed my foot to move past the shifter with minimal outward ankle turn.