Author Topic: CB750 K3F - AKA The Red (Read 118551 times)

Finnigan · « **Reply #175 on:** February 19, 2014, 09:07:22 PM »

I like the approach you took, most people wouldnt figure out a way to do it like that!

BTW I just installed my HD Ape cylinder head studs and the directions I followed showed 8ft/lbs max

MoMo · « **Reply #176 on:** February 19, 2014, 09:54:26 PM »

Quote from: Finnigan on February 19, 2014, 09:07:22 PM

I like the approach you took, most people wouldnt figure out a way to do it like that!

BTW I just installed my HD Ape cylinder head studs and the directions I followed showed 8ft/lbs max

Something is amiss as 8 cannot be correct with that size of stud

Finnigan · « **Reply #177 on:** February 19, 2014, 10:10:18 PM »

See instructions at bottom of page here:
http://4into1.com/ape-heavy-duty-cylinder-studs-honda-cb750-sohc/

But keep in mind that even though it says 8 for the studs, the top nuts are much higher

MoMo · « **Reply #178 on:** February 19, 2014, 10:35:10 PM »

Quote from: Finnigan on February 19, 2014, 10:10:18 PM

See instructions at bottom of page here:
http://4into1.com/ape-heavy-duty-cylinder-studs-honda-cb750-sohc/

But keep in mind that even though it says 8 for the studs, the top nuts are much higher

That makes sense as I thinking nuts not studs. OH WELL, I have been called nuts by some people...Larry

70CB750 · « **Reply #179 on:** February 25, 2014, 12:50:30 PM »

Old adjustment screws, good enough for camshaft setting, getting new ones.

70CB750 · « **Reply #180 on:** February 26, 2014, 01:10:16 AM »

3AM I had satori. I understood suddenly I am an idiot. My life has many milestones of similar comprehensions.

See I was trying to measure valve to piston clearance but the playdoh kept coming out squished to zero, almost like the valve would kiss the piston.

3AM today I realized once the piston goes to TDC, of course the playdoh will be squished to nothing, unlike the elevator of my mind, the piston goes all the way to the top.

I will use the leverage method in proper piston position instead but first I have to get new metric 10 socket, lost it at the shop yesterday. Attempting to work on CB750 head without 10mm socket is a pure torture.

MoMo · « **Reply #181 on:** February 26, 2014, 04:19:00 AM »

Prokop, it took you this long to learn you're an idiot

?

I have lost/misplaced more tools than a couple hundred dollars could replace so I solved the problem by buying way more than I need, especially 10mm sockets-think I own at least six 3/8 drive. That way when my little brain cannot remember what I did with the one I was using I simply reach for another

The missing tool usually shows up, frequently in my back pocket

. Regards

70CB750 · « **Reply #182 on:** February 26, 2014, 06:37:45 PM »

So I got few more lights, good to see all those piles of junk around.

70CB750 · « **Reply #183 on:** February 26, 2014, 06:40:08 PM »

Installed mockup springs for the purpose of checking clearances.

70CB750 · « **Reply #184 on:** February 26, 2014, 06:41:28 PM »

Also got new adjustment screws from Dynoman, the front row are new, the back row used.

70CB750 · « **Reply #185 on:** February 26, 2014, 06:44:31 PM »

After some traditional amount of confusion I was able to check both #4 valves for clearances, those feelers are .092" total, there was no contact and the camshaft was advanced 4.5 degrees from the factory 0 degree setup.

I think this is where it's gonna stay.

cb650PK · « **Reply #186 on:** February 26, 2014, 07:17:05 PM »

Quote from: 70CB750 on February 26, 2014, 06:41:28 PM

Also got new adjustment screws from Dynoman, the front row are new, the back row used.

Hey, nice grouping, what did you "print" that with and what distance?

Kickstart · « **Reply #187 on:** February 26, 2014, 08:55:39 PM »

I just read this entire thread from the beginning. Very nice work Prokop!
I'm also really impressed you cut the valve seats yourself.

Regarding the MLS head gasket, did you do any special surface prep? I think the MLS gaskets are the way to go. I was going to get one but I wasn't sure about the surface finish requirement it specified, so I just stuck to stock.

Also, with the MLS gasket, do you still use the rubber seals for the oil return studs?

Again, nice work Prokop... I'll be watching the rest of your build.

MoMo · « **Reply #188 on:** February 26, 2014, 10:08:55 PM »

Quote from: cb650PK on February 26, 2014, 07:17:05 PM

Quote from: 70CB750 on February 26, 2014, 06:41:28 PM
Also got new adjustment screws from Dynoman, the front row are new, the back row used.
Hey, nice grouping, what did you "print" that with and what distance?

Noticed that too, impressive....Larry

70CB750 · « **Reply #189 on:** February 27, 2014, 05:32:53 AM »

CB650PK: That grouping are 45-70 cast bullets at 50 yards from my brush gun - H&R Ultra Hunter. I hunt with jacketed hollow points, but for some reason she loves cast boolits - from wheel weights, nothing fancy - and Trail Boss, it flies half the speed and at 100 yards you can actually hear it hit, but the groups are smaller than Hornady Interlocks.
Now where did you get your signature line? S CB750 na věčné časy a nikdy jinak.

Kickstart: Thank you, Chris! The seat cutting was certainly an experience, I still don't consider myself an expert, hopefully it will hold and last.
The MLS gasket was based on reading forums, I am glad I got it, it holds perfectly well to the never ending head pulling. What sold me was that MLS does not need to be retightened - at least it was one opinion I saw somewhere:)
And yes, I am still using the cylindrical rubber seals where they go - on the picture they are under the MLS gasket.

cb650PK · « **Reply #190 on:** February 28, 2014, 05:41:49 PM »

You cast your own bullets from wheel weights, cool. unfortunately New Jersey is very gun unfriendly state and I am looking for range to shoot my old Mauser. The old gun range was sold to developers while ago.
And " S CB750 na vecne casy a nikdy jinak" ? Common, you must remember "Se SSSR na vecne casy a nikdy jinak." My other bike is 1959 Jawa 250 Kyvacka and is in my house some 7km from Tynec nad sazavou where it was made. I think I have seen you post on Jawamania.

70CB750 · « **Reply #191 on:** February 28, 2014, 05:52:01 PM »

Lol, čížkové jsou všude

I have few SMLEs but no Mauser.

Yes, I am on JM too.

Stev-o · « **Reply #192 on:** March 04, 2014, 06:52:28 PM »

Quote from: 70CB750 on February 26, 2014, 06:37:45 PM

So I got few more lights, good to see all those piles of junk around.

I need to wire up an additional light for my workbench area too. Looks like a good size workshop, lucky you. Seems the workbench is never big enough, eh?!

70CB750 · « **Reply #193 on:** March 05, 2014, 04:22:03 AM »

Quote from: Stev-o on March 04, 2014, 06:52:28 PM

Quote from: 70CB750 on February 26, 2014, 06:37:45 PM
So I got few more lights, good to see all those piles of junk around.

I need to wire up an additional light for my workbench area too. Looks like a good size workshop, lucky you. Seems the workbench is never big enough, eh?!

You got that right, this is the clean/assembly table 4'x8' and the engine took the whole space little by little for more than a year. For dirty work and fabricating I have bench with vice where spilled oil and grease matters not.

70CB750 · « **Reply #194 on:** March 11, 2014, 07:14:51 PM »

I took out bearings from the rear hub, the retainer was sticking out. Also made a universal tool for retainers from an old saw wrench and 1/8" spring pins. Not my idea, saw it long time ago in Prague. There is always space for new pin hole, the tool is gonna last.

70CB750 · « **Reply #195 on:** March 11, 2014, 07:16:46 PM »

Using M24x1.5 tap to clean threads, they were not in bad shape, only here and there some slight damage.

I am confused. How is it supposed to come back together? The spacer is 106.5 and hub installed bearings are 104 apart, sure I could leave the sprocket side bearing few mm above the rim, there is enough space and maybe even it was meant that way, but it just does not feel right.

I will have to make a bearing driver too, 52mm is too big for any socket in my tool box.

70CB750 · « **Reply #196 on:** March 16, 2014, 01:41:19 PM »

Frame bubble wrapped to meet the engine.

70CB750 · « **Reply #197 on:** March 16, 2014, 02:15:00 PM »

It worked.

70CB750 · « **Reply #198 on:** March 16, 2014, 03:55:35 PM »

And that's how she stands tonight.

edwardmorris · « **Reply #199 on:** March 16, 2014, 07:22:05 PM »

I had the engine out this way but the wheels were still on. I'm seriously considering assembling the top end in frame now that I have Gordon's kit installed. Previous plan was to do what you did above, but with the wheels on first, so the engine could stay off the ground. I don't have anything to hold the bike up except its center stand. Nice progress!

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Author Topic: CB750 K3F - AKA The Red (Read 118551 times)