| Author | Message | ||
     Ft_bstrd |
How can you tell if they are going? Thanks to Littlebuggles, I've been running a 170 rear tire and am noticing quite a bit more "squirm" than I did with the 180 rears. Got me thinking. What do bad swing arm bearings feel like? How do I check? I wiggled the swing arm while I was replacing the rear isos but didn't detect any movement. I'll be putting a 180 rear back on after the 170 is toast. That last 1/4 inch of the 170 is nearly vertical. | ||
| Jramsey |
IMO the rear ISO's whether new or old make it feel like the swing arm bearings are loose. Nothing feels more squirrel'er then riding a bike with a rubber joint in the middle. Stiffeners are the only cure, but they have drawbacks also. | ||
| Oldog |
FT_ I put the bike on stands, removed the rear wheel and unhooked the shock, raise and lower the arm if its notchy the bearings are bad, they are the same as the steering head bearings, you need 2 bearings (cups and cones) and 3 or 4 seals, they are thin and difficult to replace Plan on bending at least one. On the x1 the isos remove and the plugs(pins) slip out on the M2 its gota be different, you just did that right? the arm is supported by 2 steel pins clamped into the motor mount the bearings will either rust (bad seals no grease) or track (draw screw too tight) unless flopping it will keep till winter just watch it while waiting on seals and bearings ( assuming that they need changing ) roller bearings will take enormus punishment before quitting, ask me about the trailer the year I took DJ home. | ||
| Ft_bstrd |
I inspected the bearings when I did the isos. They looked good. No rust. The swing arm moved freely. I don't think it's the bearings. I think it's the tires and maybe a little squirm from the rear isos. | ||
| Oldog |
yes thats likley, when they "track" the rollers make notches in the cup you can feel it notch into the at rest position, over time it destroys the bearings, hint when you change the seals and bearings take a small file or a knife you dont care about and scrape a 45 degree bevel around the mouth of the swing arm bore, easy does it as the seal is about 1/8" thick and a 1/16" "chamfer" will make it easer to start the seal, these are one of the few b|tch jobs on a tuber for service, and perhaps isos for you. | ||
| Fahren |
any bearing set that does not get the opportunity to turn a full360 under normal operation, such as steering head or swing arm bearings, will eventually notch because of the repetitive back/forth motion in a limited range. They are a wear out/replace item for sure; not sure about the R/R interval. |
