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Author Topic: Removal of final drive sprocket on engine  (Read 175 times)

Moreirdan

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Removal of final drive sprocket on engine
« on: July 27, 2014, 11:20:47 PM »
Any hints on how to do this? As far as I can see it needs a 46mm socket, any hints on how to do it best?
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mattsz

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Re: Removal of final drive sprocket on engine
« Reply #1 on: July 28, 2014, 12:26:51 AM »
Lots of info in the "archives" - do a search.

My experience:

http://www.enfieldmotorcycles.com/forum/index.php/topic,16501.0.html

Ragmas

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Re: Removal of final drive sprocket on engine
« Reply #2 on: July 28, 2014, 04:16:38 PM »
Yup, 46mm.  Not that difficult a job.

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barenekd

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Re: Removal of final drive sprocket on engine
« Reply #3 on: July 28, 2014, 04:43:10 PM »
Leave the chain on the bike so you have someting to hold the sprocket as you break the nut loose. Just tighten the rear brake adjuster down to keep the wheel from turning.
Once the nut is loose, it's pretty straightforward. IF the chain is off already, you can wrap it around the sprocket and stick a screwdriver in it to to jam the sprocket. I used to have a foot long length of chain welded to an 8" long tube to hold onto the sprocket.
Don't expect engine compression and having the bike in gear to keep it from rotating.
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GSS

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Re: Removal of final drive sprocket on engine
« Reply #4 on: July 29, 2014, 01:06:09 AM »
Easiest way I found was to leave the chain on, press down on the brake pedal with the left foot to lock things in place and then use a 46mm socket with a breaker bar to tighten/loosen the nut.  Don't forget that there is a locking washer that you have to "unbend" before loosening, and bend again after tightening to lock down the nut.

GSS
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shamelin

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Re: Removal of final drive sprocket on engine
« Reply #5 on: July 29, 2014, 02:19:01 AM »
Easiest way I found was to leave the chain on, press down on the brake pedal with the left foot to lock things in place and then use a 46mm socket with a breaker bar to tighten/loosen the nut.  Don't forget that there is a locking washer that you have to "unbend" before loosening, and bend again after tightening to lock down the nut.

GSS

+1.  Some people have had different experiences with the degree of force required to remove the 46mm hex nut.  Some one reported that it was finger tight only, whereas I had to use a 6 ft steel pipe as a breaker bar in order to loosen the nut.  Keep the chain on and, if your nut is as tight as mine, find a friend to step on the brake and hold the socket flush on the nut while you hang off the end of the breaker bar.

Good luck.  It's a fun project.

Craig McClure

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Re: Removal of final drive sprocket on engine
« Reply #6 on: Today at 02:38:57 AM »
IF you are fortunate enough to own a H.F. big red platform lift, The bike can be immobilized/ strapped down to it front & rear, put in gear, & chain jammed at rear sprocket with a big hardwood dowel. First the lock washers ears are pried away with a cold chisel. Then heat the nut up with a butane torch, & remove nut with an Air Impact Wrench & Socket. Slick & Easy.
Best Wishes, Craig McClure