| Author | Message | ||
     Sokota |
After reading of concerns of trans oil reaching these bearings [especially the outer one] I removed the seal and did the following : bike in gear , rear tire chocked , front wheel full lock to left , progressively leaned bike to right. At 31* lean oil finally dripped from shaft . I then cut the rubber center out of the seal and sealed in a site glass. I made a prop stick out of 2x2 , 31 1/2 inches long with a 1/4" groove on one end. This is placed against steering neck with the bottom of top crown casting resting in the groove. With wheels chocked it is a right side kickstand. The test : cold engine , on the real kickstand overnight , lean it on prop stand watch for oil : at 2min 30sec oil is at bottom of site glass, at 3min site glass is full of amsoil 20/50. The bike is 05 XB9SX. | ||
| Aptbldr |
Mark, is lean angle on prop about like lean angle on stand? " ...wheels chocked it is a right side kickstand. ..." I made slit in output shaft's rubber seal. Added a little oil into shaft at changes & resealed with silicone. Might have just leaned it against the wall for while! : ) Output shaft in rotation (loaded) 'sees' an oil film, not a flood... Thanks. | ||
| Sokota |
The prop stick is basically straight up and down with bike leaning on it. I used a roofing pitch gauge flat across the gas cap to get the angle. I started at 20*...nothing , went to 25*...nothing after 45 min, finally ended up at 31* and oil showed up in minutes , decided to put the site glass in the seal at that point. On the XB9SX when leaning on the prop stand , it is leaned over to the 3/8 wide "chicken stripe" currently showing on the rear tire. Its leaning quite a bit farther compared to being on the left side kick stand.On the UKbeg site they are injecting 5ml of trans fluid every 2500 miles . I lean it over about once a week. | ||
| Blake |
When the tranny is rotating at speed, oil is being flung all over. What gave someone the idea that the bearing wasn't getting adequately lubricated? If that happened, it was probably due to low oil level, no? | ||
| Bluzm2 |
Blake, I have seen lubercation issues with that particular bearing. One went out on my M2 while under warranty, the whole 5th gear assembly had to be replaced. I've also seen instances where the seal has popped off. No telltale dripage from the bearing area to warn of the problem. I've seen this on one of my S2's and 2 Bikes (an S1 and a S3). A number of years ago I used synthetic grease to grease the bearing and shaft. When I did some clutch work, I pulled the tranny to see if the grease was still there. It was, there appeared to be little if any washout from the tranny oil. It was still visibly red like when it I put it in. Like you said, you would think that oil is flung all over in there but it appears that area is pretty well "sheltered". I've got some pictures somewhere of my M2 before it want to the shop. I'll see if I can find and post them. | ||
| Starbellied_sneetch |
Mine just disintegrated about a month ago. I can move the shaft with front belt pulley attached all over the place. | ||
| Reepicheep |
On tubers, I think damage to those bearings is also caused by mis-adjusted belts. | ||
| Hoser |
The leading cause of failure to these needle bearings is water intrusion or condensation. Water enters through the clutch cable or the vent hose , often the owner of the vehicle is unaware that the oil is contaminated . A quick check for damage is to remove the small seal from the center of fifth gear and check for rust. |
