How to Replace Yamaha Grizzly YFM700 Front CV Boots 

A small cut or tear in a CV boot will quickly let protective grease out and destructive dirt in, which leads to CV joint damage. 

Anytime you replace one front CV boot on your Yamaha ATV, replace the one at the other end of the axle as well. If you don’t install a new CV boot now while the half shaft is off your ATV, you’ll have to take everything apart again in a month or so when the other CV boot wears out. Watch the video above and follow the steps below to change a Yamaha Grizzly YFM700 front CV boot. 

Tools and Parts Needed – Yamaha Grizzly 700 Front CV Boot Replacement

Tools

  • Ratchet and extensions
  • 12mm, 17mm, 19mm, 27mm sockets
  • 14mm wrench
  • Punch tool

 

  • Flathead screwdriver
  • Pliers
  • Hammers
  • Torque wrench

Yamaha Grizzly CV boot installation

NOTE: The front CV boot sets for the Yamaha Grizzly are slightly different from one another. The CV boot set (double offset joint) is for the outer CV joint while the CV boot set (ball joint) is for the inner CV joint.

How to Change Yamaha YFM700 Grizzly Front CV Boot

Step 1. Remove the front wheel and the central dust cap beneath it.

Step 2. Use a punch tool to bend back the rim of the axle nut where it’s bent against the axle, then remove the axle nut.

Yamaha Grizzly CV axle boot replacement

Step 3. Remove the two 12mm caliper mounting bolts, and slide the brake caliper assembly off the brake rotor.

Yamaha YFM700 CV axle boot replacement

PRO TIP: Use a cable tie to hold the caliper assembly up and out of the way against the shock absorber spring.

Step 4. Remove the brake rotor and wheel hub.

Yamaha Grizzly YFM 700 front CV boot replacement

Step 5. Remove the cotter pin from the steering arm ball joint nut, followed by the nut and washer. Tap the steering arm ball joint out of the steering knuckle using a soft blow hammer.

Yamaha Grizzly 700 front CV boot replacement

PRO TIP: If the steering arm ball joint refuses to come out, put the castle nut on the screw thread backwards and strike it with a regular hammer to jolt the ball joint free. 

Step 6. Remove the cotter pin from the upper ball joint nut, then remove the nut. Tap the upper ball joint out of the knuckle using a punch tool and hammer, being careful not to damage the screw thread on the ball joint.

Yamaha YFM700 steering knuckle

Step 7. Remove the cotter pin from the lower ball joint nut, then remove the nut. Tap the lower arm ball joint out of the steering knuckle using a dead blow hammer. 

NOTE: If the lower ball joint is stubborn, use the method in the PRO TIP from Step 5.

Yamaha Grizzly ATV front CV boot replacement

Step 8. Remove the steering knuckle and set it aside.

Step 9. Remove the half shaft by swiftly pulling it outward. 

Yamaha Grizzly YFM700 CV boot replacement

PRO TIP: If you can’t jerk the half shaft out this way, use a pry bar to put pressure on one of the webs on the shaft, and then swiftly pull the half shaft out.

Step 10. Starting with the outer CV boot, bend back the tabs on the two metal clamps and remove the clamps from the CV boot.

Yamaha Grizzly 700 CV boot change

Step 11. Cut off the CV boot, and wipe away the old grease to expose the CV joint.

Yamaha Grizzly YFM 700 front CV boot removal

PRO TIP: Don’t use brake/contact cleaner to remove the grease, as it’ll dilute the grease packed deep down in the CV joint and lead to excessive wear.

Step 12. Carefully strike the innermost part of the CV joint (where it meets the half shaft) with a hammer to knock it off the half shaft.

Yamaha Grizzly ATV CV boot replacement

Step 13. Remove the circlip from the end of the half shaft.

Yamaha Grizzly 700 front CV boot change

Step 14. Remove the inner CV boot by taking off the metal clamps, then cutting off the old CV boot or sliding it off the half shaft.

Yamaha YFM700 ATV inner CV boot change

Step 15. Wipe away the old grease from the half shaft and CV joint, and remove the circlip from the end of the half shaft.

Step 16. Pack the inner CV joint with grease, and slide a new inner CV boot down the half shaft and into the channel in the CV joint. Slide the smaller end of the CV boot into the channel on the half shaft.

Yamaha Grizzly inner CV boot grease

PRO TIP: Try to avoid getting any grease into the channels where the CV boot connects to the CV joint and half shaft, because grease between the two will compromise the connection and cause the CV boot to slip off the CV joint or half shaft.

Step 17. Install new clamps onto the CV boot, and bend down the tabs to fully secure them. Make sure the leading edge of the clamps are facing the half shaft’s direction of rotation. This minimizes the chances of anything hitting the trailing edge of the clamps and lifting them up when you’re riding your Grizzly.

Yamaha Grizzly YFM 700 CV boot installation

Step 18. Install a new small CV boot clamp and CV boot onto the half shaft. 

NOTE: Make sure you install the small clamp first, otherwise you’ll never get it onto the half shaft once the CV boot is in place.

Yamaha ATV CV boot installation

Step 19. Install a new circlip onto the end of the half shaft.

Grizzly YFM700 ATV CV boot installation

Step 20. Pack the outer CV joint with grease, making sure it’s aligned with the splines on the half shaft, and tap it back onto the half shaft.

Yamaha Grizzly CV joint installation

Step 21. Slide the CV boot into the channels in the CV joint and the half shaft. Tighten the small clamp, and install and tighten the large CV boot clamp. Once again, make sure the leading edge of the clamps face the half shaft’s direction of rotation.

CV boot replacement Yamaha Grizzly

Step 22. Lightly grease the splines on the inner end of the half shaft, and tap the half shaft back into the transmission housing.

Yamaha Grizzly front CV boot installation

Step 23. Lightly grease the splines on the inner end of the half shaft, and reinstall the steering knuckle.

Yamaha ATV YFM700 CV axle boot replacement

Step 24. Slide the lower ball joint and upper ball joint back into the steering knuckle, and reinstall the ball joints’ nuts. Torque the lower ball joint nut to 22 foot-pounds and the upper ball joint nut to 18 foot-pounds. Replace the cotter pins in the upper and lower ball joints.

Yamaha Grizzly YFM700 CV ball joints

Step 25. Slide the steering arm ball joint back into the steering knuckle, and reinstall the washer and ball joint nuts. Torque the ball joint nut to 18 foot-pounds. Replace the cotter pin.

Yamaha Grizzly steering arm

Step 26. Reinstall the brake rotor and wheel hub, and install a new axle nut.

Yamaha ATV YFM700 brake caliper assembly

Step 27. Reinstall the brake caliper assembly back over the brake rotor, and torque the two 12mm caliper mounting bolts to 22 foot-pounds.

Step 28. Torque the axle bolt to 190 foot-pounds. 

PRO TIP: The easiest way to achieve this is to replace the wheel, sit the Grizzly on the ground, and have someone apply the brakes to hold the machine in place as you torque it.

Step 29. Remove the wheel, and stake the new axle nut with a punch tool to secure it in place.

Yamaha 700 CV boot install front

Step 30. Reinstall the central dust cap and the wheel, torque the lug nuts to 40 foot-pounds and you’re done.

Yamaha Grizzly CV boot installation replacement

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