Topic: primary shaft removal

[hymodyne]

had to take out my primary drive shaft to replace the chains (cam, drive) in my cb500K. the manual said i needed a special tool from honda to drive the shaft out after the circlip was removed. I discovered that a standard spark plug screwed into the opening at the end of the shaft provided enough of an extension that I could tap against the hex head of the plug and, after turning the shaft a 1/4 turn each time, gradually pull the shaft and bearing out of the lower case.

hym

[544cc]

Good tip! I jjust went through the same thing myself but couldn't really manage to get it out with the sparkplug- wasn't able to get a decent swing at the head of the plug.  a 4"-6" m12 bolt with a 1.25 thread pitch did the trick, took some searching to find one though as most hardware stores don't carry bolts that size with the finer pitch.

[bryanj]

Dont need to do either, leave the primary gear on and use a wide flat lever under it OR remove oil pump and tap on other end of shaft that is visible

[snipcod]

This may be old but it sure did work!  Thanks for the idea

[hatchett]

Another way that I like a lot is really easy if you keep some parts around.  An axle bolt with the same threads with a couple of spacers on the bolt makes for a nice slide-hammer. 

[Ian Bunyan]

For further help, I have just removed mine this morning.

You don’t need to remove the circling as it’s on the side coming out.

Also, I used the bottom rear engine mount bolt which is the correct M12 x 1.25 with the nuts on one end and the hammer piece from my slide hammer fitted no problem.

The shaft came out with only a few light taps.

I have found your thread very helpful.

Many thanks,

Ian.