Thursday, August 6, 2015

FRONT TIRE REPLACEMENT

The process of changing a front tire is nearly as straightforward as the rear, but adds a few steps. The center stand will be required along with some kind of support under the skid plate. 

The lift table with this size bike is more difficult than it's worth. You can back the bike into the wheel chock and jack up the front. The center stand eliminates this need and makes the process easy. I use a Handy Industries scissor jack under the skid plate to keep the front off the ground. I run the jack up so the rear tire is touching the ground to keep the bike stable. Be careful as the center stand is not very wide and the bike has the possibility of falling over. 

I was able to get 15k miles out of the front tire and the calipers were in need of a cleaning.

Removing the mud guard for cleaning everything and more room to work...

Remove the axle nut and nearly remove the (4) pinch bolts. Tap the axle out while supporting the tire.

I remove the caliper pins and pads to ultrasonic soak the calipers themselves. All the hardware from removing the tire goes into the ultrasonic cleaner as well to remove all brake dust funk.

I had an issue with some slow speed brake pulsing due to some pitting at the same point on both rotors. I removed, roughed up all brake surfaces, and offset the pitted spot to help reduce the pulsing. This allowed a good cleaning of the spokes and brake discs. Be aware of the directional arrow on each disc and the ABS wheel. 
25NM torque. 

 Re-install axle, torque nut to 50NM, tighten pinch bolts CAREFULLY to ONLY 10NM. 
DO NOT RUIN YOUR FORK TUBES BY OVER TIGHTENING THE PINCH BOLTS!
Reinstall the assembled calipers at 25 NM.



Mudguard back in place, ABS wire re-attached to the brake line on right side, test ride to verify install. 

Wednesday, August 5, 2015

REAR TIRE REPLACEMENT


The process of changing a tire is straightforward on the Stelvio due to the sidestand and single sided swingarm. Not too difficult, but the process is shown below.


I perform all of my work on a motorcycle lift table. This holds the front wheel steady, but prevents the use of the center stand. Using a small jack carefully on the suspension pivot allows the stand to be used while on the table. This job is rated as a one beer (cider) job.

I also tie the forks to help stabilize the bike on the table. Running a 1" pipe through the table base at floor level can also add some lateral support to prevent table flip-over if performing some more involved work.


Prior to removing the wheel, the caliper needs to come off first. These are (2) 13mm bolts to easily slide the caliper out of the way.


I check the brake pads for wear (15k miles here), remove the pads, clean the caliper, re-grease the floating pins.


Prior to reassembly, the caliper (minus pads) goes for an ultrasonic soak. This does a fantastic job of cleaning the entire caliper. Solvent temp is raised to ~100-120 deg F by a stainless fish tank heater prior to a 5-10 minute ultrasonic run.


Check the fluid level and look for any water contamination in the CARC oil as long as we are in here...


Buttoned up and ready for the front tire...