Got my 43T rear sprocket put on today, took the pitch down to 525 and changed out the flange to something sexier.
Guys, if you’re running stock 40/15, your bike is unfinished (IMHO). It’s like night and day.
Before: You’re moving along at a good clip and come up on some cars. Passing not an option. Have to slow to 35mph, drop it to second, too high in the torque curve, try third again; borderline lugging. Ugh. ** Hit a really sharp angle, already leaned in, don’t want to downshift now, let the revs fall while still in third, hit apex, damn not enough power. Wait, there’s a 6th gear?
After: Acceleration comes on hard, first gear isn’t as unbearable (but it’s barely there), clutch feels a bit lighter. Second gear fine for a slow crawl. Third can do 35-40 mph all day and you’ll spend most of your time in it on twisties. Get up-on-it in the twisties and click it into 4th on apex exit until the next sharp turn approaches. Power is tight, smooth and delivers surprisingly fast. More overall time is spent “in the power.” Sixth gear 6k rpm at exactly 100. Just right.