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Author Topic: how do i undo clutch lock nut?  (Read 3981 times)

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Offline kajtek

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how do i undo clutch lock nut?
« on: December 14, 2011, 11:46:34 AM »
bike is a cb400, engine is out of the frame, so clutch is just spinning the transmission, no chain/wheel to stop it.

tried it with a impact driver (hammer type), no luck. any suggestions? dont want to have to put engine back in the frame and refit the chain just to undo the nut!

help..
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1978 honda cb400f supersport

Offline dave500

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Re: how do i undo clutch lock nut?
« Reply #1 on: December 14, 2011, 11:48:07 AM »
you might try and wedge some rag in the primary gears.
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Offline kajtek

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Re: how do i undo clutch lock nut?
« Reply #2 on: December 14, 2011, 12:07:09 PM »
do you mean the trans gears? only difficulty is they are turning in the wrong direction to jam something in..

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1978 honda cb400f supersport

Offline MCRider

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Re: how do i undo clutch lock nut?
« Reply #3 on: December 14, 2011, 12:38:11 PM »
Quote from: kajtek on December 14, 2011, 11:46:34 AM
bike is a cb400, engine is out of the frame, so clutch is just spinning the transmission, no chain/wheel to stop it.

tried it with a impact driver (hammer type), no luck. any suggestions? dont want to have to put engine back in the frame and refit the chain just to undo the nut!

help..
Grab the counteshaft with some vice grips and let them turn into the cases, maybe.

Friendly tip: Just an opportunity to remind folks, remove/loosen that nut and the rotor bolt etc, while the engine is still in the frame.
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Ron
1988 NT650 HawkGT;  1978 CB400 Hawk;  1975 CB750F -Free Bird; 1968 CB77 Super Hawk -Ticker;  Phaedrus 1972 CB750K2- Build Thread
"Sometimes the light's all shining on me, other times I can barely see, lately it appears to me, what a long, strange trip its been."

Offline Ernest T

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Re: how do i undo clutch lock nut?
« Reply #4 on: December 14, 2011, 01:29:17 PM »
I stuck a dowel through the little end of the conneting rod.
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Offline kajtek

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Re: how do i undo clutch lock nut?
« Reply #5 on: December 15, 2011, 04:26:31 AM »
Quote from: MCRider on December 14, 2011, 12:38:11 PM
Quote from: kajtek on December 14, 2011, 11:46:34 AM
bike is a cb400, engine is out of the frame, so clutch is just spinning the transmission, no chain/wheel to stop it.

tried it with a impact driver (hammer type), no luck. any suggestions? dont want to have to put engine back in the frame and refit the chain just to undo the nut!

help..
Grab the counteshaft with some vice grips and let them turn into the cases, maybe.

Friendly tip: Just an opportunity to remind folks, remove/loosen that nut and the rotor bolt etc, while the engine is still in the frame.

Thanks for the suggestion, in the end used vice grips on the output shaft and it came undone easily :)
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1978 honda cb400f supersport

Offline MCRider

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Re: how do i undo clutch lock nut?
« Reply #6 on: December 15, 2011, 06:25:37 AM »
Yay!   :D
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Ride Safe:
Ron
1988 NT650 HawkGT;  1978 CB400 Hawk;  1975 CB750F -Free Bird; 1968 CB77 Super Hawk -Ticker;  Phaedrus 1972 CB750K2- Build Thread
"Sometimes the light's all shining on me, other times I can barely see, lately it appears to me, what a long, strange trip its been."
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