Doesnt have to be done that way. If U dont want to change the shape of anything. Here is how U can also do it.
Get 4-8 washers the size of the area behind the reaset on the frame. Or just get 2, 8mm spacers. Also buy 2 new rearset bolts (make sure they are stong) They need to be 8mm longer than the stock ones. Put it all back together and dont forget the locktite. Then just take the lever and reverse it to the other side of the crank used for changing gears. Seriously takes less than 20 minutes and U can put it right back to stock if U need to......