well try between 4k-5k, keep in mind this is in first gear, with the cluthc out roll on the throttle and shift in that range to bring the front end up, start at the bottom of that rpm range until you get the feel of it. If it doesn't do anything for ya, then sit back a bit in the seat, this changes how the bike reacts to the shift, the further back you are the easier and FASTER the bike will come up, so be careful. try this on long straight roads until you get the hang of it, eventually you will be able to do this with the bike coming out of a turn while still leaned over just a tad. Most important thing is be careful. Also, keep in mind that this is coming from a 150lb guy on a xb9sx, you're running an xb12ss which has about 10 more ft/lbs of torque and you might be a bit heavier than me. Also, look up the dyno chart for your bike, I'm assuming it's stock, aim for the "peak torque" range. Just play with it and see where you feel the most pull in the upper RPM range, don't shift right before this RPM range, shift in the middle or towards the end of it.