headstock bearing replacement

[benny13]

Hi lads, I'm have to replace the headstock bearings but I'm having a hell of a time trying to get out the top bearing race, there's no notch/slot to get a bar in a tip it out!
any tips?

cheers

[Con Rod]

there is a small notch at the bottom one but I am not ashamed to say I resorted to a dremmel, cut a notch out of the inner races and then pried them out

Bearing sizes are here if you need them:

http://www.trx850.com/phpBB_forum/viewt ... =37&t=7422

[benny13]

there is a small notch at the bottom one but I am not ashamed to say I resorted to a dremmel, cut a notch out of the inner races and then pried them out

Bearing sizes are here if you need them:

http://www.trx850.com/phpBB_forum/viewt ... =37&t=7422

ah good man, cheers mate, that will help a lot!

cheers for the sizes too

[fung]

another method is to add metal with a welder to the race thus giving you purchase for the drift.
cheers
fung

[cobbadiggabuddyblooo]

anyone tried using a hydralic jack once the bottom one has been removed possibly using a socket the size close to the tube diameter and pressing this up to push it out... Just as an idea

[cobbadiggabuddyblooo]

but then again I spose you would have to ratchet strap the frame to stop it pulling upwards

[alextrx850]

Just what Fung said...a quick MIG weld on the bearing face both sides gives you a great purchase point ...
A pain in the arse that the Yamaha boffins didnt give a cut away like the lower race...
Not much else will work as good...
Otherwise you COULD heat the outer frame tube to expand the metal which will release the bearing race.. but you will bugger your paint, and youd have to have the frame upside down to let it fall out as you tap the outer.....
A quick MIG weld..

[bagmaker]

a little mig OR tig line
More to the point the cooling weld shrinks and takes the bearing shell with it making it easier to remove.
A hundredth of a millimetre means a lot here. After a couple of quick lines the bearing will often just fall or pop out.
Try not to get the paint hot on the frame

bagger

[cobbadiggabuddyblooo]

thats great if you have a welder in your back pocket

[fung]

fair enough
most D I Y places (bunnings , coastes hire etc) will hire out an arc welder, and that will do the job.
cheers
fung

[benny13]

cheers for the replys lads, good thinking

I think when I have it out I might put a cut away so if myself or anyone has to changed them again it should be easier!

[alextrx850]

thats great if you have a welder in your back pocket

WHA...? if youve got a six pack....[stop looking at your stomach..!]
..ive got a MIG....

[cobbadiggabuddyblooo]

WOW those Russians will sell anything for money... stick that motor in the TRX

[cobbadiggabuddyblooo]

and it only cost you a six pack i'm guessing vodka... COOL

[alextrx850]

WOW those Russians will sell anything for money... stick that motor in the TRX

Not that kind of MIG either...!

Sounded like it from my last video footage..heh heh