Aaron,
I was snoopin around since i got my car used i never got the real manual. Im having a very hard time with gearing and motor temp running a stock motor. My track rarely has enuff wheelers to have a class so i run in the novice class just so i can race.The XXX4's manual reccomends a 25 and has the same ratio as the G+ manual of 2.10 that reccomends 17-20(depending on track size and motor).
My car started out a regular XXX4, i bought everything but diffs and pulleys/slipper. But the ratios are the same on both models so i wonder why the early version has a 25 and the latter 17-20....
All my car info is here.
http://rctech.net/forum/showthread.php?t=134884
Any help would be great!