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

Hi Brian,

Thanks for that, it is much appreciated, and hopefully helpful to others too.

The bolts are a lot more than I expected though, so I will leave it for a while and most likely drill and tap the linkage and the current bolts.

While I agree in theory that these bolts are not part of a bearing surface and so should not get worn, on my wife's and my XT600s I have found significant ware on their equivalent bolts, with a definite step worn around the shaft. I don't recall the replacement bolts being that expensive (could be my bad memory though).

Looking at the white models parts diagram I get the impression that I can drill and tap a hole for a grease nipple in the swing arm, also on the do later list.

The part number that I referred to in my earlier post is 90179-10665-00. It is item 35 on the white's part diagram and looks like a bolt. Don't know what the (Greek?) description says. It is item31 on the blue's part diagram and also looks like a bolt, but the description says Nut. Priced at $35.75 it seems unlikely that it is a nut, but a google search on the part number brings up a few results calling it a nut, and doesn't find any calling it a bolt. Puzzling.

All the best

 

Lama

This part of my re-build thread may help you...

domski1 wrote:

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Mine is a 1995 model. There must be holes in the bearing rollar shafts too? Brian might be along shortly to clear up the confusion! Sorry to hi jack your thread with my rusty bolts!

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To clear up the confusion..

I checked the 1999 model shafts and they don't have holes see (pic below). It must be just the older models that have the holes & grease nipples.

The frame shaft collar already has a hole in it (left side in pic below) That is why i thought it was the shafts that had holes

The other two would need to be drilled in the middle of the shaft (and shaft heads for nipples) as there is is no collar to stop it reaching the bearings.

I can measure how far up the shaft the holes have to be if you like but you can use the collar (pictured left)as a template for the frame mounting shaft (first bolt on left).

 

They may need slight machining to put a grove in the two short bolts see pic below.

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That should make it clear but ask me if your still not sure.

I don't mind you hi-jacking my thread,it's all good. This thread is open to all questions.

Jarrah.

Greywolfs info would be great if it was in english. Any chance you can edit it Brian and make it into one of your useful STICKY's? its a job I would like to try one day.

Having just stripped my linkage and the bearings arent worn just grease gone dry so insides are rusty so they will need replaced

When i replace them i will pack them with waterproof grease but when i took the linkage off my old white bike i noticed the bolts had grease nipples on the end which seems like a good idea (wish i hadnt sold them now !) ,my old quad had nipples on the linkage and it was greased after every ride and water always used to spurt out if id been through rivers

The bolts on my blue bike are hollow so i could put nipples on the ends and i assume drill a hole half way along to let then grease into the bearings

So my question is has anyone done this before and does anyone have a pic of the linkage bolts off a white bike so i know where to drill the holes ?

 

Thanks

 

 

 

There is the option of fitted it to the linkage also. This would only work for the dogbone pictured below though...

Jarrah

 

chrisstdt wrote:

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Thanks for the reply looks fairly easy il give it a go before i put them back in ,the holes look like there in the middle but it shouldnt have to be exact and it would be easier to tap one into the alloy linkage

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No problems Chris

Yes, the holes are in the middle of the shaft (as mentioned in the picture above).

Just remember to machine the shafts so you have the groove needed to disperse the grease.

Jarrah

 

i put a grease nipple on my swing arm .it's been on for the last couple of years and has work well

Just don't force too much grease in .you can feel when it is full the gun loads up considerably

Not a lot happening in the shed today temp pushing 40 deg 

My old Serow had about five grease nipples fitted as standard which made life easy.
Just a point the lingage nipples were fitted below rather than on top as shown on Les photo. If I were fitting grease nipples I would go with them underneath that way the grease is being appliied/forced into the lower surfaces where most of the wear would likely be.
One day I really must fit many nipples to my TTR, it was always quite satisfying greasing the Serow and watching all the new grease ozzing out of various oriffices!

TTRfan wrote:

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The thing is, if the seals are working properly, by pressurising the bearings with grease won't that potentially blow the seals? 

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 Yes Brian, but if you regrease them properly there should not be any pressure to blow the seals. If grease starts oozing out, you have obviously used too much.

Also, it would not matter whether the nipple is fitted to the top or bottom as grease has a way of filling up the space and dispersing any air pockets. Once the swingarm is full with grease, there will be no air left, therefore the grease will be dispersed evenly to all areas.

 

colin13846 wrote:

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 If I were fitting grease nipples I would go with them underneath that way the grease is being applied/forced into the lower surfaces where most of the wear would likely be. 

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 I won't try to change your thinking but IMO- ''if anything'', the top of the swingarm would need more grease as heat and gravity has only one way with old grease.

Jarrah

I think the key is not to put too much force on the gun when putting the grease in ,with my old quad you would always push some water out of the seals so that has to be good

The seals are designed to keep water out and grease in hence my concern at possibly blowing the seals with too much pressure on the grease gun.

Seems like everyone understands the issue which is great. I used to fit grease nipples to the head stocks of my dirt bikes and, after power washing, a few pumps on the grease gun would usually push out a bit of water which was what was needed 

You almost need an extra "blow off" grease nipple that works in the opposite way to normal and releases grease when the pressure builds up sufficiently. Or maybe there already is such a thing?  

Brian

what i do about every 6months  to freshen up the grease is loosen the swingarm bolt and then pump in grease it goes in  and comes out round the  ends of bolt 

no worties over 40 years of playing with yamahas .ive got a few short cuts 

 

Fitted my newly modified bolts and linkage bearings today and as brian said its very easy to push out the seals espcialy on the dog bone as theres nothing to stop the seals coming out so very light pressure on the gun is the way forward