Swingarm Pivot Bolt
Posted November 13, 2010 - 11:09 AM
I'm down to just frame, motor and swingarm on a 98 wr400 and I cant seem to budge the swingarm pivot bolt to remove the motor. I'm sure this problem has arose in the past but any ideas on how to free this thing up. Have tried sledge, heat, lubrication........What the hell is holdin this thing in?
Thanks for any ideas
Posted November 13, 2010 - 11:41 AM
Posted November 13, 2010 - 11:48 AM
What the hell is holdin this thing in?
I strongly suspect its lack of maintenance (ie regular cleaning/greasing) and rust! An all-too-common occurance.
I'm not familiar with the 400s but I assume the bolt is hollow?
If so I reckon I'd track down some of that "Loctite Freeze and Release" spray.
I'd carefully heat the outside (ie the swingarm) first, being extra careful not to melt the aluminium. (Aluminium doesn't change colour when melting so be careful!)
I'd then spray the inside of the bolt with the Loctite spray.
I'd then go at it with a heavy hammer and (copper or similar soft metal) drift.
I reckon that would have to budge it, surely!
Edited by WR450FGreg, November 13, 2010 - 09:38 PM.
Posted November 13, 2010 - 12:24 PM
Anyway, thanks for the suggestions. If I was to cut it, where would I do that? Does'nt seem to be any room between the swingarm and frame to get a blade in.
I'll try some of the solvent you suggested.....Maybe after it sits a couple days it might go.....When I grab the swingarm and move it up and down, the bolt actually spins with the arm. Do you think thats telling me its frozen to the arm itself and not to the frame or motor?
Never an easy job..........
Thanks a Lot for your help!
Posted November 13, 2010 - 01:15 PM
Edited by miweber929, November 13, 2010 - 07:40 PM.
Posted November 13, 2010 - 07:23 PM
Posted November 14, 2010 - 12:42 AM
Posted November 14, 2010 - 12:49 AM
also, here was my thread about it : http://www.thumperta...garm pivot bolt
Posted November 14, 2010 - 12:48 PM
Posted November 15, 2010 - 09:53 AM
When I was rebuilding my dads it 465 I had the same problem. I used knock'r loose and an air hammer
Good idea if you can do it.
Trouble with the (later at least) WR450Fs is that the head of the axle bolt itself is actually round (with one flat face) and sitting inside a recess in the frame. All your work has to be done from the nut end!
Personally, I fully grease the swingarm bolt and both axles when I get any new bike these days. I re-grease them each time they come out too (unless I'm out in the bush fixing a flat.)
A mate of mine is having the same trouble with his '06 WR250F bolt. I warned him about greasing it not long after he first bought it. Did he listen? NO!
Now he's paying the price! LOL!