Yamaha’s New Torque Assist Gear Kit For The YXZ 1000RPosted in How To: Transmission Drivetrain on January 9, 2017
Yamaha calls the YXZ 1000R the “Worlds First Pure Sport Side By Side” and after having driven one around a wet and muddy Brimstone Recreation in Huntsville, TN, we can say that even when soaking wet (both us and the YXZ…), it’s an amazingly fun vehicle to drive.
We were there for the debut of GYTR’s latest product, the Torque Assist Gear Kit, which is a lower gear set for the manual transmission. So, not only does the YXZ have a manual trans, you can now gear the transmission for different environments. If you want to go rock crawling, then this addition, along with the 30-inch EFX MotoClaw tires Yamaha also announced as new, would really make things fun. Maybe you want to put paddles on it and hit the sand, or just usually drive in a tight, technical space, then raising the torque output would certainly help and the additional 40% reduction added to 1st gear provides for some ultimate low speed crawling.
Another benefit from gearing for torque is the ability to putt the YXZ around in 2nd or 3rd gear. It’s easy and fun. Because of the slippery conditions, we never got near top gear, so we don’t have first hand knowledge of the top speed of a lower geared YXZ, but 85mph is pretty much the stock geared YXZ’s limit, but that was with the 27-inch Maxxis Bighorns. We’d love to try a speed run with the 30-inch Motoclaws. 90mph should be possible on a hard, flat surface, so figure that you’ll lose maybe 10-15mph with the lower gearing.
Seventy-five is still pretty fast, so you’re not losing much top end with the lower gears, but you’ll be gaining fun down low. The gearing change sure came in handy when climbing some of the slippery hills at Brimstone. But with the Torque Assist Gear Kit and the differential locked, the YXZ cruised up them easily and without a lot of out of control wheel spinning.
Speaking of wheel spin, just to refresh your memory, power for the YXZ comes from a 998CC inline triple. The engine features Electronic Fuel Injection via three 41mm Mikuni’s and has 4 valves per cylinder. Add an 11.3:1 compression ratio, a redline of 10,500 hundred rpms and the YXZ can be a screamer. But we’ve also found that the engine runs clean even at lower rpms in tight sections. As long as you’re in the right gear, that is.
The other item that Yamaha revealed were the 30-inch EFX Motoclaw tires. You’ll get more ground clearance and Yamaha says the sidewall is stiff enough to keep good cornering characteristics and the 8 ply rating will provide a good overall toughness. It has a 1-inch deep, intermediate tread design should work well on a variety of surfaces, including the mud puddles we encountered. This weekend at Brimstone was a tough test for them, and though with the low range YXZ it was easy enough to break them loose in the mud, we’d like to give them a fair shot in other types of dirt.
Included in the kit are all the gaskets and bearings needed to do the job, along with an adjustable speedometer calibrator. It provides the ability to adapt to various tire sizes for precise speedometer reading. Dealer installation is naturally recommended, but our additional recommendation is to buy another trans, install the kit in one of them, and have both a stock and low-range option. Know that the Torque Assist Gear Kit isn’t compatible with the paddle equipped SS. The kit fits the 2016-’17 YXZ1000R (#2HC-E7530-V0-00) and has an MSRP of $999.99.