Well the sweet thing about the angles in the slot is there as you hit full Throttle to produce more torque to the belt the moving pulley cheek will rotate the moving shive against the angled slot the angled slot assist the spring of the contra giving you the effect of having a stiffer stronger spring under heavy loads / Throttle this makes the bike downshift getting you into the Prime of the power band.
But we're not applying for throttle and doing a normal drive you don't end up having to have your RPM going to the moon just trying to cruise through the neighborhood.
So you will get better fuel efficiency but if you need the power it's there if you live in a area with a lot of hills it comes in really nice because it will automatically downshift increasing the torque for whatever you're riding up
If you ever make it to Oakland one of the best Hills to test out the set-up is called snake Road it it's so steep that you're climbing one foot up for every 4 feet you're going forward.
And various with lots of twisty turns and even some steeper sections.
When you get your shit dialled in to it just holds you in the peak of the power band you have to back off of it because the front end starts to come up when you're almost riding a wheelie around the turns up the hill it's pretty fucking awesome it's one of my favourite rides in Oakland.
So if you live in some place like Kansas where everything is as flat as the top of your head you will be fine with the stock groove but if you're somebody who likes to be cruising and nail the throttle and have the rpms come up so you can make a fast pass on somebody or you ride in a lot of steep hilly areas you definitely want 100000 present want tingled slots/guides.
But when you're coming out of a turn in hit the throttle it will also downshift giving you a better shot of Speed coming out of a turn.
Hey Alex we need to talk.