Having ridden a renegade 1000, I'm confident that if it had a manual transmission it wouldn't take long to strip the gears out of it. To beef it up enough to hold the power it would be too large for the application. The sport ATV's manage it but they run very small tires and don't get in near the bind that larger utility machines do.
2012 Rancher AT-MSA Nukes w/ 28 Zillas, 2" Lift, 3k winch, Custom Stereo, Ammo Cans for storage, Cold Shrink Cable sleeve for grips
2007 400ex-SS112 sport w/ GNCC holeshots, Trinity full exhaust, Pro Armor rear skid, nerfs, and front bumper