Author Topic: 1975 CB750 Build! "Kona" - Sold and gone. (Read 70092 times)

Ravie · « **Reply #25 on:** July 08, 2014, 11:06:14 AM »

Maybe I could do stacks with prefilters. I dislike the look of the stock airbox greatly.

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Ravie · « **Reply #26 on:** July 08, 2014, 11:09:02 AM »

Yeah, dcc will be getting a lot of business from me.

So much to think about!

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Ravie · « **Reply #27 on:** July 09, 2014, 10:12:36 AM »

Is there anything I really should replace in the transmission while I'm there? Friction discs?

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Roach Carver · « **Reply #28 on:** July 09, 2014, 11:51:54 AM »

Roach Carver · « **Reply #29 on:** July 09, 2014, 11:53:01 AM »

if you are tearing it all the way down primary chain replacement would probably be a good idea

Ravie · « **Reply #30 on:** July 09, 2014, 08:05:01 PM »

Thoughts on the friction discs? the motor has 26k on it...

I went out with the intent of getting the more complete bike torn down as far as I could. I really wanted the engine out tonight.

But that didn't happen.

I had a hard time getting the forks out (but was finally successful). Played around with what ideas I had to get the motor out. None of my friends found themselves able (or willing) to come help, so i decided I needed to get the fork and swingarm off. (the forks were horrible.)

I finally got it all town down to just the frame, and now I find it impossible to get the engine out.

I was tired and stressed and frustrated which is usually a good point to walk away. So I did.

As she sits....

goldarrow · « **Reply #31 on:** July 09, 2014, 09:21:48 PM »

If your local friends won't help removing the motor, we cyber friends will. Many here have done it one man show including myself. You'll need to remove oil filter if havens done so. I'm going to be pulling my 75 750F soon too! Just to fix the rubber pucks leaks

SOHC4 Cafe Racer Fan · « **Reply #32 on:** July 09, 2014, 11:16:58 PM »

Remove the filter. Then flip the whole package on its side, pull the engine mount bolts, and bingo.

Ravie · « **Reply #33 on:** July 10, 2014, 04:42:26 AM »

Yeah, I've done all that. The oil pan and oil filter are off. No dice. It's getting stock on the back side.

calj737 · « **Reply #34 on:** July 10, 2014, 04:55:35 AM »

When you flip it onto it's right side, place some magazines or phone books on the ground to create some space between the motor and the ground.

Then while on the ground, grab the frame and work it off, jiggling and wiggling as you go. It's best to remove the engine mouthing bolts once it's on it's side. If you pulled the fronts, then the mount tends to wedge in, and becomes a bit more headache to wrest free.

Once the motor is out, install a "frame kit" from member 754. It's a no-weld install and will make install and removal a snap, and head service possible while in the frame.

But the frame has to come off at an angle, then lift, then tilt, then lift....

Ravie · « **Reply #35 on:** July 10, 2014, 10:10:08 AM »

Yeah. I got it out of the first frame and figured the second would be easier.. I was wrong! Haha
I'm sure little Japanese techs slid them in in seconds... Bastards... Haha

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Ravie · « **Reply #36 on:** July 10, 2014, 02:32:00 PM »

It's out.

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goldarrow · « **Reply #37 on:** July 10, 2014, 02:33:11 PM »

Beautiful. Now let the fun begins

Ravie · « **Reply #38 on:** July 10, 2014, 02:58:48 PM »

Yes sir! I think I'm gonna take it outside and hit it with a hose before I even start disassembly. I'll shove some rags in the intake/exhaust holes.

I'm going to bring my frame and tank into work tomorrow to see if I can get a guy to help me shorten the tank to fit. I may even take some parts to hit in the sandblaster at work (brackets n stuff). I need to get a set of JIS drivers.

Ravie · « **Reply #39 on:** July 10, 2014, 07:45:49 PM »

Dumbest question ever: Are the throttles on CB750's "push-pull" with two cables?

I know, i JUST took that apart but...a lot of nuts and bolts have passed through my ratchet this week...

Trying to build a cart to budget and I just couldn't remember. Since I'm doing new bars I'm going to get the throttle assembly with the grips. Just need to know if I need a single or a double.

Thanks guys!

SOHC4 Cafe Racer Fan · « **Reply #40 on:** July 10, 2014, 08:32:50 PM »

Quote from: Ravie on July 10, 2014, 02:32:00 PM

It's out.

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Deceptively heavy, isn't it?

Ravie · « **Reply #41 on:** July 10, 2014, 09:00:36 PM »

Quote from: CB750 Cafe Racer Fan on July 10, 2014, 08:32:50 PM

Quote from: Ravie on July 10, 2014, 02:32:00 PM
It's out.

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Deceptively heavy, isn't it?

You ain't foolin. Gotta get a buddy to help get it on the rebuild bench.

calj737 · « **Reply #42 on:** July 11, 2014, 12:47:52 AM »

Throttles are push-pull.

edwardmorris · « **Reply #43 on:** July 11, 2014, 02:28:22 AM »

If you haven't already, grab a copy of Mark Paris/Hondaman's book before you tear into the engine, highly recommended

Ravie · « **Reply #44 on:** July 11, 2014, 06:35:31 AM »

Quote from: edwardmorris on July 11, 2014, 02:28:22 AM

If you haven't already, grab a copy of Mark Paris/Hondaman's book before you tear into the engine, highly recommended

No disrespect intended to him(seriously), but it looked to me when I did some poking around as though that book costs 100 dollars? That's the most ridiculous book price I think I've ever seen. At that price I will probably never buy it. That's a lot of parts. Bob Helt wrote a similar style book about the Corvair which I purchased a few years ago. I think it was 35 bucks.

If I'm mistaken about that I apologize. That's just what I saw.

Roach Carver · « **Reply #45 on:** July 11, 2014, 06:45:56 AM »

Its a good book written by a well respected member here. the cost is related to the limited audience. Theres not a million of us cb750 guys out there. Its also filled with color photos and detailed info. It goes on sale every so often. I would recommend it but hey, no worries either way.

calj737 · « **Reply #46 on:** July 11, 2014, 07:13:32 AM »

That amount of money is saved every time you use the book to tar down an engine, rebuild an engine, or build a bike. Knowledge and experience on how to do things correctly the first time, cannot be valued.

Much of the knowledge of members here is gleaned from their own experience having used that book. Penny wise and Pound foolish-

Ravie · « **Reply #47 on:** July 11, 2014, 08:44:00 AM »

Quote from: roach carver on July 11, 2014, 06:45:56 AM

Its a good book written by a well respected member here. the cost is related to the limited audience. Theres not a million of us cb750 guys out there. Its also filled with color photos and detailed info. It goes on sale every so often. I would recommend it but hey, no worries either way.

I understand that. I really do. 100$ is just a lot of dough. Especially for a guy attempting to build with a limited budget.

It's not about being pound foolish. It's about not having pockets lined with cash. I understand fully that it's a GREAT item. But it's still a pretty penny.

Anyway, I'm not trying to beat the guy up. I know the knowledge in it is indispensable. We'll see. I'd like to have it, for sure.

Sure be great if there were a cheaper PDF version! :-)

edwardmorris · « **Reply #48 on:** July 11, 2014, 08:50:38 AM »

Its alright, I was in a similar boat when I started last year, but I am extremely glad that I bought it and was just sharing what I learned. There is enough collective knowledge on these forums to help you through an entire build, but a physical copy with over 40+ years of first hand knowledge in front of you, as you're wrenching away, is no match for a PDF or having the forum open on a device in the shop. Just my 2c of course, good luck with your project, having the engine out on the bench was one of my most fun moments with the project.

seanbarney41 · « **Reply #49 on:** July 11, 2014, 10:37:58 AM »

Quote from: Ravie on July 11, 2014, 08:44:00 AM

Quote from: roach carver on July 11, 2014, 06:45:56 AM
Its a good book written by a well respected member here. the cost is related to the limited audience. Theres not a million of us cb750 guys out there. Its also filled with color photos and detailed info. It goes on sale every so often. I would recommend it but hey, no worries either way.

I understand that. I really do. 100$ is just a lot of dough. Especially for a guy attempting to build with a limited budget.

It's not about being pound foolish. It's about not having pockets lined with cash. I understand fully that it's a GREAT item. But it's still a pretty penny.

In that case I cannot recommend that you try rebuilding one of these engines. You will spend well over $100 on gaskets. Just try to find a used, good condition engine instead. You are gonna need a lot of expensive parts just to take it apart and put it back together again and it is unlikely that you will get it right without as many reference sources as possible. These are not small block chevy's.

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Author Topic: 1975 CB750 Build! "Kona" - Sold and gone. (Read 70092 times)