Author Topic: 1972 CB750K2 (start from scratch) project. Cases back together (Read 102203 times)

Stev-o · « **Reply #475 on:** April 26, 2016, 08:55:05 PM »

Quote from: Davez134 on February 12, 2016, 02:28:22 PM

Not the most exciting update, but I added oil pressure gauge for peace of mind. I meant to do this a while ago but spaced it out. It was sooo easy to install. I may leave it on, or just use to check pressure periodically. Looks OK too, just have to get used to it if I leave on.

I just bought one too. Did you use Teflon tape or "pipe dope" on the threads?

edwardmorris · « **Reply #476 on:** April 26, 2016, 08:55:38 PM »

Was it for sure that seal that was leaking and not just chain lube? My center stand gets greasy and I clean it every few trips, but its easy to tell its the chain lube based on how stringy it is (Lucas brand I think). The black paint could be hiding it, but that area looks too clean for an oil leak to me, unless you already cleaned it before the pix?

Davez134 · « **Reply #477 on:** April 26, 2016, 09:03:08 PM »

Quote from: edwardmorris on April 26, 2016, 08:55:38 PM

Was it for sure that seal that was leaking and not just chain lube? My center stand gets greasy and I clean it every few trips, but its easy to tell its the chain lube based on how stringy it is (Lucas brand I think). The black paint could be hiding it, but that area looks too clean for an oil leak to me, unless you already cleaned it before the pix?

Yeah, I'm sure it's not chain lube. Drips down kickstand, all over wheel. Not horrible, but oil for sure. And it's not coming from oiler hole either, I left the tray out and plugged the hole as well. The pic doesn't show it well, but it's oily as #$%* in there.

Davez134 · « **Reply #478 on:** April 26, 2016, 09:06:47 PM »

Quote from: Stev-o on April 26, 2016, 08:55:05 PM

I just bought one too. Did you use Teflon tape or "pipe dope" on the threads?

Just used some tape. Really like the gauge.

edwardmorris · « **Reply #479 on:** April 26, 2016, 09:07:08 PM »

Quote from: Davez134 on April 26, 2016, 09:03:08 PM

Quote from: edwardmorris on April 26, 2016, 08:55:38 PM
Was it for sure that seal that was leaking and not just chain lube? My center stand gets greasy and I clean it every few trips, but its easy to tell its the chain lube based on how stringy it is (Lucas brand I think). The black paint could be hiding it, but that area looks too clean for an oil leak to me, unless you already cleaned it before the pix?

Yeah, I'm sure it's not chain lube. And it's not coming from oiler hole either, I left the tray out and plugged the hole as well. The pic doesn't show it well, but it's oily as #$%* in there.

Cool. Just for added sealing, apply a thin coat of Hondabond/Permatex #2 on the outer surface. I'm pretty sure I did that, will have to go back and check before I get to the K3.

Davez134 · « **Reply #480 on:** April 26, 2016, 09:17:32 PM »

I did apply hondabond to outer surface. It was actually leaking from around shaft part of seal. Maybe got tiny damage somehow when installing?? I'm going to use permatex this time outside, as it seems like it may lube better installing, then seal too.

Davez134 · « **Reply #481 on:** April 27, 2016, 09:42:31 AM »

To get proper clearance, I removed shifter cover and foot peg.

Made tool to hit it in with, got to play with my new cut off saw.

Covered splines with tape, assembly lube on inside, non hardening dealer on outside of seal.

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evanphi · « **Reply #482 on:** April 27, 2016, 10:06:50 AM »

That's a tiny chop saw!

Davez134 · « **Reply #483 on:** April 27, 2016, 10:21:28 AM »

Quote from: evanphi on April 27, 2016, 10:06:50 AM

That's a tiny chop saw!

Ha ha. I can't tell if you're joking or not because it does look small in that picture but it is 14 inch and heavy!!

evanphi · « **Reply #484 on:** April 27, 2016, 10:57:52 AM »

I'm used to larger bases for woodworking. Yours must be for cutting steel?

Davez134 · « **Reply #485 on:** April 27, 2016, 12:35:52 PM »

It actually uses same blade for steel/aluminum, plastics. You can touch the steel right after cutting and it doesn't burn your hand. It's an evolution/rage blade and saw. Haven't used my DeWalt saw since I got this one.

Davez134 · « **Reply #486 on:** April 27, 2016, 03:42:43 PM »

So, I think the reason this seal was leaking was the inner lip location. Compared to the OEM self I just put in, the lip was further out toward the end of splined shaft. It was just about where the splines start. The genuine seal inner lip is a few mm back toward smooth part of shaft. The original one I put in came in a kit from cycleX.

MRieck · « **Reply #487 on:** April 28, 2016, 03:23:49 PM »

The only thing I'd add is cut the corner off a plastic sandwich bag and cover the splined shaft. It will help prevent tearing the seal lip as you slide it over the shaft. Just pull it out right before you set the seal. It just noticed...sliding it over the shaft, pulling it out...never knew working on replacing a seal was so much like sex.

Davez134 · « **Reply #488 on:** April 28, 2016, 06:34:44 PM »

Quote from: MRieck on April 28, 2016, 03:23:49 PM

The only thing I'd add is cut the corner off a plastic sandwich bag and cover the splined shaft. It will help prevent tearing the seal lip as you slide it over the shaft. Just pull it out right before you set the seal. It just noticed...sliding it over the shaft, pulling it out...never knew working on replacing a seal was so much like sex.

sandwich bag would have been a much better idea than the tape I used. Yeah, my mind is dirty too...the only difference between all that you just said about the bike and sex is that with the latter, I dont swear, get angry and want to punch or throw anything during or after. Yet.

Davez134 · « **Reply #489 on:** May 23, 2016, 06:54:40 PM »

Got a chain guard finally. Had it powder coated in a fine texture black because it had some rust pitting that would have showed if done in smooth gloss.

Matches the texture on my motor pretty close too

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evanphi · « **Reply #490 on:** May 24, 2016, 05:03:01 AM »

WOW!

SOHC4 Cafe Racer Fan · « **Reply #491 on:** May 24, 2016, 08:37:37 AM »

Looks good Dave.

MRieck · « **Reply #492 on:** May 25, 2016, 04:32:59 AM »

Quote from: CB750 Cafe Racer Fan on May 24, 2016, 08:37:37 AM

Looks good Dave.

I agree

el pachuco · « **Reply #493 on:** June 07, 2016, 11:33:51 PM »

Quote from: Davez134 on May 23, 2016, 06:54:40 PM

Got a chain guard finally. Had it powder coated in a fine texture black because it had some rust pitting that would have showed if done in smooth gloss.

Matches the texture on my motor pretty close too

Sent from my iPhone using Tapatalk

Another beautiful bike!!
I recently sprayed my chain guard with rattle can bed liner. It looks very much like yours. I like it much better than gloss black.

Also, I read where crimping the gauge halves back together kicked your butt.
I just did mine today. I used a piece of 4" PVC pipe (2" long ), sitting on a ' round plywood base for the upper half to rest in and a 12" speed clamp to press the two halves tight, while I crimped them back together. Made for a good tight seal and a secure fixture while I hammered away on the ring.

budman · « **Reply #494 on:** June 27, 2016, 06:53:39 AM »

You do nice work, Dave.

eM3rge · « **Reply #495 on:** October 21, 2016, 05:03:07 PM »

Hey Dave! I was just browsing around here and I think I have your old bike!

Davez134 · « **Reply #496 on:** October 22, 2016, 07:52:32 AM »

Nice, haven't seen it in a while. Good to know someone is still enjoying it!

eM3rge · « **Reply #497 on:** October 22, 2016, 09:38:06 AM »

You're more than welcome to check it out, I'm at the southwest part of the valley.

Davez134 · « **Reply #498 on:** October 22, 2016, 10:01:27 AM »

I'm in the southwest as well. We'll have to go ride soon.

moraarcher · « **Reply #499 on:** October 25, 2016, 08:37:17 PM »

Very impressed, what a beautiful bike. Just showed the pictures to my wife and said I'd like to something like that someday. She said it looked great and if that's what I wanted to do go ahead. That's my opening and now I'm on the hunt. I still have some things to finish on my '72 750.
Once again nice job on the bike and the write up.

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Author Topic: 1972 CB750K2 (start from scratch) project. Cases back together (Read 102203 times)