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

BM Steve · Guru

All Balls Bearing Kits

petenz · Super Guru

I think the biggest issue is not the bearings them self
but the seals & the condiction of the surface they have to seal on...
Dosn't matter how good the bearing are once water/dirt gets in
they are toast pretty quickly...

...

ttboof · Super Guru

I have found they don't last as long as genuine but much cheaper if I can find an alternative I will give it a go

BM Steve · Guru

Thanks for that, I hadn't really thought of that side of it, possibly the effected bikes had damaged sealing surfaces

One benefit of them is they are really easy to source, ebay, any bike shop etc...

-- Edited by BM Steve on Thursday 25th of August 2016 11:10:18 AM

Scruffy · Member

I bought the Swing Arm Bearing Kit. The mechanic who fitted it told me that when he tightened the bolt the swing arm wouldn't move freely. He reckoned the Needle Bearing Shaft supplies in the kit was a few 100ths too long. Fortunately the original was serviceable. Still cost me some labour though.

I also fitted the rear suspension Linkage Bearing and Seal Kit. There seemed to be plenty left over but no issues reported with the fitting.

On the plus side, I have done 14000 km since fitting the kits on some pretty rough roads and dirt tracks (London to Bishkek) and have has no problems at all.

TTRfan · Super Guru

Hi Scruffy

Not to cast doubts on the expertise of your mechanic but what he says doesn't really make any sense. If the bearing shaft in the All Balls kit was too long then the assembled swing arm wouldn't fit in the frame. I am assuming that wasn't the case as your mechanic managed to fit it confuse

The basic idea with the swing arm, linkage bearings, wheel bearings etc is that the bearing shafts (or inner races and spacers in the case of wheel bearings) are torqued up solid so that the bearing and its housing (in your case the swing arm itself) can rotate around it. The bearing shaft and collars must remain solid for the bearing systems to work.

Changing out the shaft for a shorter one wouldn't make any difference if everything else was fitted properly. I have fitted at least a dozen of the All Balls kits and have never had such an issue. I must have sold at least 40 or 50 of the kits over the years and have had no adverse feedback so I remain confused confuse

Probably too late now to get to the truth of the situation in your particular case but presumably you still have the new shaft from the kit and would be interested to know it's length. Not that a few hundreds of an inch would make a difference if you accept my explanation

Brian

TTRHead · Senior Member

I have never had an issue with AllBalls they are a good bearing

ttr steve · Super Guru

I can do a measurement of the shaft in the kits, just to double check, will report in later smile

Steve