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Engine Mechanical TopicsDiscussion for motor builds, cams, head work, stripped bolts and other engine related issues. The good and the bad. If it goes round and around or up and down, post it here.
Tool inprogress for breaking clutch nut free
Is there a better way to break the front crank nut free than wedging an impliment between the front and rear primary sprockets/chains. Seems Neanderthal to do it that way.
In-progress in making a tool to hold the clutch center to break 1.5" nut free.
You need a locking bar to wedge in the teeth of the comp sprocket teeth and clutch hub sprocket teeth to prevent the parts from turning. Then a long (36 or longer inch) braker bar with the correct size 6 point socket. The threads are right, so turn if left to remove it.
It's possible someone used the high strength red thread locker (locktite) on the nut when it was last installed. That may require some heat to losen the thread locker (locktite). But try to losen it without heat first. And if heat is required, just get it hot, not glowing red.
If you end up needing to remove the clutch basket, the same locking bar tool works, but the threads are left.
I appreciate the advice. Engine was received out of the frame and somewhat disassembled. Understand on not neanderthal to do it that way. Just wanted to do it properly
It's a 1975 XR 750
Last edited by Mofosheee; Nov 30, 2023 at 10:12 AM.
You need a locking bar to wedge in the teeth of the comp sprocket teeth and clutch hub sprocket teeth to prevent the parts from turning. Then a long (36 or longer inch) braker bar with the correct size 6 point socket. The threads are right, so turn if left to remove it.
It's possible someone used the high strength red thread locker (locktite) on the nut when it was last installed. That may require some heat to losen the thread locker (locktite). But try to losen it without heat first. And if heat is required, just get it hot, not glowing red.
If you end up needing to remove the clutch basket, the same locking bar tool works, but the threads are left.
Paul
Understand to anticipate probable locktite.......will warm up. Right hand threads on the crank, expect left hand threads on the clutch basket.
Looking for a commerical business to media tumble the cases for this restoration.
Anyone come to mind?
I don't know of anyone that can media tumble anything that large, perhaps others will.
I use crushed walnut shells as they do not remove any metal or impregnate the metal and leave a nice surface finish. Vapor honing is another option that does not impregnate the metal. Just clean everything up really well (no grease or oil) before you start. And after.
As Dan said, double check that the clutch hub nut isn't right thread on that year and model.
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How to break nut free
