Thinking of doing the X3 162" and 7t avid drivers,on my 14 pro. Motor is stock beside a par. 12.5 head, MDS weights. Is the 7t drivers gearing down the right amount? Or would i need to gear down more? Are any of you having cooling problems? Some rides I need to do max 15km, Of groomed trail that can be kind of hard packed. Stock track and scratchers down run about 130-140f.