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The TTR250 FAQ web pages -> TTR250 -> Repairs and maintenance -> Front Wheel Bearings Replacement
Post Info TOPIC: Front Wheel Bearings Replacement
yamahalife


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Front Wheel Bearings Replacement
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Ive looked through some of the older threads and I cant seem to find anything on replacing the front wheel bearings. Does anyone have a guide for that project? Also the torque specs for the axle nut and pinch bolts. Any help would be greatly appreciated. Thank y'all in advanced as always.



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mossproof


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This thread might be helpful, although it's not an "Official Brian how-to thread"

ttr250.activeboard.com/t49130795/wheel-bearing-removal/

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yamahalife


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I saw that one earlier and i am assuming the front bearing is going to be similar to the rear. I am thinking I am mechanically inclined enough that I should be able to figure out everything out. I was just hoping to have a "how to guide" just in case I do run into a snag. But I really need the torque specs more than anything. I am guessing that they are pretty critical on the pinch bolts and axle nut.



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mossproof


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Front wheel spindle torque 58Nm/42ftlbs
Spindle clamp nuts 10Nm/7.2ftlbs
If the clamp has an arrow on it, this should point upwards. Nip the top nuts up first, then the bottom ones, then torque them up, tops first.

The layout of the bearings is the same front and back: Seal-bearing-spacer-bearing-seal, although the back wheel has 2 bearings on the sprocket side. Getting them out is a bit of a mission. I like the expanding bolt/rawl bolt idea. It may work better if you expand it in the spacer rather than the bearing as getting it to grip the hardened bearing surface is difficult. then knock it out from the other side. Don't over tighten the rawlbolt in the spacer - it might stretch it. You just want the grippers to be a slightly larger diameter than the inner diameter of the bearing.

The bearing has to come out from the side it's fitted in - that is you can't knock them all through from one side. Getting a punch to grip the edge of the bearing race can be hard, and risks damaging the spacer so be careful.

That all sounds more garbled than it should, but I'm not going outside tonight and dismantling my bike to take pictures

Good luck!

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TTRfan


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Oh dear! I only ever did a guide on replacing the rear wheel bearings - see here 

However the thread Simon links to seems to provide all the info needed but, if not, ask away wink

Brian



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