Author Topic: What the heck is the neutral stopper bolt - 75 CB750 K5 (Read 9172 times)

devriems · « **on:** October 13, 2009, 05:33:51 PM »

I'm trying to remove the neutral stopper bolt that is holding the shift drum in place. Problem is, I'm not even sure what the neutral stopper bolt is. I've removed the bolt and spring that hold the ball bearing against the shift drum, but it still doesn't want to come out. My only other thought is that it could be the piece on the outside of the case that has the four holes in it for the small dowels/pins. If so, how should I remove that...it just spins with the shift drum. Any help would be greatly appreciated. Thanks.

HondaMan · « **Reply #1 on:** October 13, 2009, 07:04:21 PM »

Neutral stopper bolt.

Do you mean, the neutral detent plunger? It's also the Neutral Switch. It comes up from the bottom of the bottom case. The drum won't come out if that is still in place.

devriems · « **Reply #2 on:** October 14, 2009, 07:47:24 AM »

Quote from: HondaMan on October 13, 2009, 07:04:21 PM

Neutral stopper bolt. Do you mean, the neutral detent plunger? It's also the Neutral Switch. It comes up from the bottom of the bottom case. The drum won't come out if that is still in place.

That's the piece with the ball bearing on it that fits into the dimple on the shift drum, right? I've taken that out but the drum still isn't sliding out easily. Does it require a bit of force or should it simply slide out?

mystic_1 · « **Reply #3 on:** October 14, 2009, 09:06:55 AM »

Have you split the cases? The shift drum won't come out with the cases assembled because the pins on the shift forks are engaged in the shift drum slots.

By the by, there's rarely any need to disturb the pins and plates on the end of the shift drum unless they're damaged.

mystic_1

devriems · « **Reply #4 on:** October 14, 2009, 01:31:51 PM »

Yeah, I've split the cases. I'll get a pic of where I'm at now. Maybe somebody can point me to what I may have missed.

MCRider · « **Reply #5 on:** October 14, 2009, 03:16:18 PM »

Quote from: devriems on October 14, 2009, 01:31:51 PM

Yeah, I've split the cases. I'll get a pic of where I'm at now. Maybe somebody can point me to what I may have missed.

You should be able to lift the shift fork pins out of their slots in the drum, and with the neutral detent locator/light switch removed (the thingie with the ball bearing), the drum should slide out. No force please and do not remove the end plate with the pins, no need.

OCICBW, wait for confirmation on that.

devriems · « **Reply #6 on:** October 14, 2009, 05:09:05 PM »

Well, something is holding it in. I've removed the shift forks and the detent locator/switch. The drum wiggles just a little bit, but its hitting something solid. I just can't figure out what the heck it is.

MCRider · « **Reply #7 on:** October 14, 2009, 05:46:15 PM »

Quote from: devriems on October 14, 2009, 05:09:05 PM

Well, something is holding it in. I've removed the shift forks and the detent locator/switch. The drum wiggles just a little bit, but its hitting something solid. I just can't figure out what the heck it is.

Hmmmm.

Until someone has a better idea, I can only say don't apply force to it more than your hands.

Back to your first post. You mention not knowing what the stopper bolt was. Then you mention a bolt and a "spring". There is no spring involved with the neutral stopper. At least none that is visible or accessible. The neutral stopper, once removed, has a large ball bearing that is spring loaded in the stopper.

Are you under the engine figuratively speaking? The stopper bolt is a short 6mm (10mm head) bolt with a little removable flange on it. But your working outside the case, on the bottom side. The flange swings around and pins the neutral stopper in place. Once you remove the bolt, you have to withdraw the stopper from the cases. You would be pulling it out and its usually a bit tricky to get it started as it has a rubber oring that seals it in the cases and provides friction.

I'm suspicious we are not talking about the same thing and that you haven't removed the neutral stopper. The center of the neutral stopper has a small screw in it that holds the wire that goes to the idiot light on your dash to flash neutral.

The shift drum should slide out easily.

devriems · « **Reply #8 on:** October 15, 2009, 08:57:15 AM »

We are talking about the same thing. I've removed both the 10mm head bolt, flange and the spring loaded stopper. I'll get some pictures up tonight to show exactly what I've removed.

MCRider · « **Reply #9 on:** October 15, 2009, 09:05:13 AM »

Quote from: devriems on October 15, 2009, 08:57:15 AM

We are talking about the same thing. I've removed both the 10mm head bolt, flange and the spring loaded stopper. I'll get some pictures up tonight to show exactly what I've removed.

I'm back to: Hmmmmm

devriems · « **Reply #10 on:** October 15, 2009, 03:23:02 PM »

OK. Here are some pics of where I am. Based on the pictures, do you think I have everything removed?

http://devriems.blogspot.com/2009/10/blog-post.html

odin836 · « **Reply #11 on:** October 15, 2009, 04:16:56 PM »

Looks to me like the insides have been removed from the outer casing...
The outer casing is probaly still within the Crank Case.

When I removed mine it came out in one complete unit. (See image)

ie. No spring, plunger or bearing visible, this was all encased withing the outer casing of the neutral stopper bolt.

It looks like during removal its been pulled to pieces.

MCRider · « **Reply #12 on:** October 15, 2009, 05:49:17 PM »

Quote from: odin836 on October 15, 2009, 04:16:56 PM

Looks to me like the insides have been removed from the outer casing...
The outer casing is probaly still within the Crank Case.

When I removed mine it came out in one complete unit. (See image)

ie. No spring, plunger or bearing visible, this was all encased withing the outer casing of the neutral stopper bolt.

It looks like during removal its been pulled to pieces.

Nice picture and I agree. As I'd said the spring should not be visible. Something is terribly wrong here. Somethings been left behind in that hole. From inside the case looking towards where the neutral stopper would be, he might be able to see something still in that groove of the drum.

Obviously some kind of casing on the neutral stopper, I've never seen one come apart like that before.

mystic_1 · « **Reply #13 on:** October 15, 2009, 06:07:38 PM »

You see the two flat sides on the casing that you pulled those parts out of? Put some pliers on those flats, squeeze, then pull and twist. The rest of the neutral switch will come out. There's an o-ring holding it in now. The nose of the housing is what's holding in the shift drum.

Clean and re-assemble the parts, using care not to break the flat plastic cap or damage the rubber seal behind it. Should be fine afterward.

mystic_1

devriems · « **Reply #14 on:** October 16, 2009, 03:02:27 PM »

Quote from: mystic_1 on October 15, 2009, 06:07:38 PM

You see the two flat sides on the casing that you pulled those parts out of? Put some pliers on those flats, squeeze, then pull and twist. The rest of the neutral switch will come out. There's an o-ring holding it in now. The nose of the housing is what's holding in the shift drum.

Clean and re-assemble the parts, using care not to break the flat plastic cap or damage the rubber seal behind it. Should be fine afterward.

mystic_1

I do now! That did it. I just didn't realize that I had taken the thing apart, instead of out

Thanks very much everybody.

mystic_1 · « **Reply #15 on:** October 16, 2009, 04:27:59 PM »

Actually it looks to me like you did a pretty good job of taking it apart, didn't break anything

I'm reminded of that joke of the gynecologist who rebuilds his car's transmission.... through the tailpipe

mystic_1

SKOL · « **Reply #16 on:** April 26, 2016, 04:14:44 PM »

Anyone know the size of the nuetral stopper bolt? I have the stopper and thebtab, just missing the bolt and need to replace it with one from the hardware store. 76' cb750

edwardmorris · « **Reply #17 on:** April 26, 2016, 04:19:32 PM »

Quote from: nalexandrou on April 26, 2016, 04:14:44 PM

Anyone know the size of the nuetral stopper bolt? I have the stopper and thebtab, just missing the bolt and need to replace it with one from the hardware store. 76' cb750

Pretty sure its 6x16, check the fiche at cmsnl.com to confirm...

SKOL · « **Reply #18 on:** April 26, 2016, 07:31:58 PM »

Sure is, thanks!

SKOL · « **Reply #19 on:** April 29, 2016, 07:10:25 AM »

Did I make a simple mistake? This bolt is too wide as well as looks to be far too long.

SKOL · « **Reply #20 on:** April 29, 2016, 07:11:04 AM »

More...

SKOL · « **Reply #21 on:** April 29, 2016, 07:11:42 AM »

And another...

przjohn · « **Reply #22 on:** April 29, 2016, 07:17:31 AM »

That is not the stopper bolt, that is the electrical connection screw threads you are trying to put that bolt in.

flybox1 · « **Reply #23 on:** April 29, 2016, 07:30:23 AM »

Quote from: nalexandrou on April 29, 2016, 07:10:25 AM

Did I make a simple mistake? This bolt is too wide as well as looks to be far too long.

what you have in your hand/pictured, is #18 above. its the retaining screw...fits thru the retaining 'D' washer.
IIRC the center screw is M3/1.0. someone, or you might be able to measure

SKOL · « **Reply #24 on:** April 29, 2016, 07:39:09 AM »

So is this just a retaining screw or does it actually have an electrical wire threaded to it that sends the neutral signal to the neutral light indicator? If it is just a retaining screw, I could simply go to a hardware shop and thread around until I find the correct bolt, right? If it actually sends a signal, then I need to do a little more digging around or would it just be an electrical wire with an eye hole connection and that bolt threaded through it into the neutral stopper?

Hope that made sense.

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Author Topic: What the heck is the neutral stopper bolt - 75 CB750 K5 (Read 9172 times)