Hey guys, heres what i did to make my agility go 52 MPH (82 km/h measured on speedometer):
Derestricted variator, CDI cut and stuff.
Air filter & jets: you would like to get a medium sized air filter, as a too small or too big isnt doing properly. With a medium sized powerfilter, ive expierienced the best effect with #84 and #86 jets, but ended up with #84, as this saves a little bit fuel.
Variator & rollers: I went with Malossi Multivar 2000, as ive heard on a danish forum, that this was a company with alot of expierience in tuningparts. The roller weight is all about enertia (the power which is requirered to make an object move) and momentum (how much power an object has stored in its movement = how much it can push), and heavier rollers has more in both. Also clutch spring has something to do with this, as it counteracts the power from the rollers, in order to keep the belt tight. With the Malossi variator came 6g rollers and a white spring, which i believe is a 33kg spring.
I used the white spring and tried both 6g rollers and 5.5g, but expierienced that although the 5.5g has a lower enertia, and starts rolling at lower RPM's, it lacks the momentum to get into highest gear, even at max RPM's.
The diffrence in acceleration with 5.5 and 6g rollers was this:
5.5g 6g
0-30 km/h: 6.3 seconds 4.9 seconds
0-50 km/h 13 seconds 10.41 seconds
0-66 km/h 22 seconds 17.74 seconds
0-75 km/h N/A 25.39 seconds.
I measured in km/h, as i live in Denmark, but i hope that you can understand where im going with this, saying that 0.5g can make a diffrence in several seconds in accellerating. Also the "guru" of the danish forum which im on, sais that 6.25g is the best on his agility so its around there, and not always "the lighter the better"