A forum for owners of Yamaha TTR250 trail and enduro bikes!

Members Login
Username 
 
Password 
    Remember Me  
The TTR250 FAQ web pages -> TTR250 -> Repairs and maintenance -> How do you grease the rear shock's spherical bearings?
Post Info TOPIC: How do you grease the rear shock's spherical bearings?
yamalama


Veteran Member

Status: Offline
Posts: 53
Date:
How do you grease the rear shock's spherical bearings?
Permalink  
 

Hi all,

The top and bottom mounting points of the rear shock use spherical bearings. How do you grease these?

The Yamaha workshop manual says that the linkage bearings are polylube type that never need regreasing. Does this include the shock mounting spherical bolts? Is this still true after eight years of use?

I have just replaced the lower shock mounting bearing with one that came in the All Balls linkage kit. Is this a polylbe type. Does it need greasing?

Is it OK (or even possible) to pivot the inner race sideways 90 degrees to expose the needle rollers? The one in my shock’s upper mounting point won’t swivel more than a couple of mm sideways. Is this normal? Do you just try and force a little grease past the underside of the inner race?

Your thoughts gratefully received

Thanks, Lama



__________________
TTRfan


Super Guru

Status: Offline
Posts: 8565
Date:
Permalink  
 

Hi Lama

Unless you are luckier than me, the polylube grid around the needles in the original Yamaha linkage bearings doesn't survive removal of the collars so the bearings then have to be greased unless being replaced.

The spherical bearings in the top and bottom shock mounts are totally different animals. They lead a very hard life and the bottom bearings don't seem to last very long at all. I think the AllBalls lower shock bearings are coated in some sort of graphite lubricating surface but I pack them out in waterproof grease to be sure. Messy job but turn the inner ball through 90 degrees and get as much grease in behind as you can - which won't be much more than a smear as its a tight fit in its housing.

The inner ball on your top shock mount is probably a tad corroded and will need working a bit to get it to move through 90n degrees. Flood it with WD40 and just keep moving it around until it frees up. Dry off the WD40 and grease as best you can to avoid the dreaded top shock bearing "squeak".

Brian



__________________

Exeter, Devon, UK

http://www.ttr250.com  - The one and only dedicated TTR250 FAQ!  

TIP: For easy viewing bookmark the "Recent Posts" view - http://ttr250.activeboard.com/p/recent/ 
yamalama


Veteran Member

Status: Offline
Posts: 53
Date:
Permalink  
 

Hi Brian,

Thanks for your very helpful and quick reply.
Somethink else on the list of this weekend's jobs then

Lama

__________________
Page 1 of 1  sorted by
 
Quick Reply

Please log in to post quick replies.
The TTR250 FAQ web pages -> TTR250 -> Repairs and maintenance -> How do you grease the rear shock's spherical bearings?


Create your own FREE Forum
Report Abuse 		Powered by ActiveBoard