Author Topic: Early Sandcast Found......  (Read 95403 times)

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Offline BenelliSEI

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Re: Early Sandcast Found......
« Reply #1400 on: August 29, 2024, 01:23:09 PM »
Per….. I have not got into them. Will report when I do.

The tank is derusting for 24 hrs. Everyone is coming for the long weekend. School starts Tuesday here. Got the bikes running and ready to go for the g’kids! The RM80 had a plugged jet. Rode it once around, that thing is lethal!
« Last Edit: August 29, 2024, 06:35:11 PM by BenelliSEI »

Offline BenelliSEI

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Re: Early Sandcast Found......
« Reply #1401 on: August 29, 2024, 01:23:44 PM »
Oh.....that flat tire seat......
Now isn't so original John! What would Frank say????
Me? I like it soft and restored for the butt.
You are doing a fine job on it.

Thanks! I agree. The foam was so shot it left a trail wherever it went!
« Last Edit: August 29, 2024, 01:34:10 PM by BenelliSEI »

Offline BenelliSEI

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Re: Early Sandcast Found......
« Reply #1402 on: August 29, 2024, 07:24:23 PM »
Tank sat all day, filled with phosphoric acid (Stearn’s Milkstone Remover and water @ 8:1) and leaving it over night. The “wrinkle tank” portion I can see just below the cap is already rust free. Definitely going to install a pair of small, well hidden inline filters for the first few tanks of gas!
« Last Edit: August 29, 2024, 07:26:11 PM by BenelliSEI »

Offline BenelliSEI

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Re: Early Sandcast Found......
« Reply #1403 on: August 30, 2024, 11:38:51 AM »
Flushed it out with a high pressure water and threw in some diesel fuel/ two stroke oil mix. Shake and drying in the sun. Not absolutely perfect, but moving ahead!

Offline 71 V12

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Re: Early Sandcast Found......
« Reply #1404 on: August 31, 2024, 02:00:23 AM »
Definitely going to install a pair of small, well hidden inline filters for the first few tanks of gas!

I would be really interested in the type of filter to use and the correct fuel line routing for K0.

Offline BenelliSEI

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Re: Early Sandcast Found......
« Reply #1405 on: August 31, 2024, 05:46:44 AM »
I’m sure it’s not “correct”, but it works. I’ll post a pic when I get to it. The family is here for the long weekend…….

Offline PeWe

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Re: Early Sandcast Found......
« Reply #1406 on: August 31, 2024, 07:44:04 AM »
Very fine powder passing the strainer?

The filter in the petcock work fine on my 2 bikes. The earlier 2 piped petcock. But not old, ordered 2013-2017.
I have a feeling that dirt will come with fuel from the gas station.
As here. No fuel starvation.


My K2 had fuel issues. It was the soft stock type non braided fuel hose from Yamiya.
It can be bent so fuel will starve.
Close to where connected on carb pipes that can be angled wrong. When adjusting air screws, move hose away for easier acccess.
Hose can be a little nicked, enough to act as too small main jets

Before checking low float level or go bigger on main jets, check fuel hose routing.
« Last Edit: August 31, 2024, 07:50:20 AM by PeWe »
CB750 K6-76  970cc (Earlier 1005cc JMR Billet block on the shelf waiting for a comeback)
CB750 K2-75 Parts assembled to a stock K2

Updates of the CB750 K6 -1976
http://forums.sohc4.net/index.php/topic,180468.msg2092136.html#msg2092136
The billet block build thread
http://forums.sohc4.net/index.php/topic,49438.msg1863571.html#msg1863571
CB750 K2 -1975  build thread
http://forums.sohc4.net/index.php/topic,168243.msg1948381.html#msg1948381
K2 engine build thread. For a complete CB750 -75
http://forums.sohc4.net/index.php/topic,180088.msg2088008.html#msg2088008
Carb jetting, a long story Mikuni TMR32
http://forums.sohc4.net/index.php/topic,179479.msg2104967.html#msg2104967

Offline BenelliSEI

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Re: Early Sandcast Found......
« Reply #1407 on: August 31, 2024, 05:43:55 PM »
The tank on this ‘69 has not been used for +48 years. I’ve cleaned and flushed it over and over but I’m sure there is still some fine “silt” in it. The petcock has all new parts, including a screen and internal “0” ring. I’m planning to hide two small inline filters between it and the carbs. I run a set on my K1 and have never had any difficulty with fuel flow. Will post some pictures when I get to it.
« Last Edit: August 31, 2024, 06:54:45 PM by BenelliSEI »

Offline BenelliSEI

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Re: Early Sandcast Found......
« Reply #1408 on: September 01, 2024, 05:49:58 PM »
Working on the tank finish today and realized the two NOS badges I have are for a 1971! Add refurbishing the originals to my “to do” list……

Offline RAFster122s

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Re: Early Sandcast Found......
« Reply #1409 on: September 01, 2024, 06:11:05 PM »
Oops
David- back in the desert SW!

Offline PeWe

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Re: Early Sandcast Found......
« Reply #1410 on: September 02, 2024, 06:14:59 AM »
K1 tank badges look fine, golden relief.
CB750 K6-76  970cc (Earlier 1005cc JMR Billet block on the shelf waiting for a comeback)
CB750 K2-75 Parts assembled to a stock K2

Updates of the CB750 K6 -1976
http://forums.sohc4.net/index.php/topic,180468.msg2092136.html#msg2092136
The billet block build thread
http://forums.sohc4.net/index.php/topic,49438.msg1863571.html#msg1863571
CB750 K2 -1975  build thread
http://forums.sohc4.net/index.php/topic,168243.msg1948381.html#msg1948381
K2 engine build thread. For a complete CB750 -75
http://forums.sohc4.net/index.php/topic,180088.msg2088008.html#msg2088008
Carb jetting, a long story Mikuni TMR32
http://forums.sohc4.net/index.php/topic,179479.msg2104967.html#msg2104967

Offline MauiK3

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Re: Early Sandcast Found......
« Reply #1411 on: September 02, 2024, 07:41:05 AM »
Can you post a photo of the two types of tank badge?
1973 CB 750 K3
10/72 build Z1 Kawasaki

Offline BenelliSEI

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Re: Early Sandcast Found......
« Reply #1412 on: September 02, 2024, 10:21:56 AM »
Can you post a photo of the two types of tank badge?

Steve…… On post 1385 you’ll see the wrong one. I put it on for the photo. It’s white with gold border and should be on my K1. Here’s what I dug out for the SC. I’ll clean them up and touch them up. JTMarks has a set on EBAY, but they are repros. These are originals. One was actually on the bike when I started……
« Last Edit: September 02, 2024, 10:30:22 AM by BenelliSEI »

Offline BenelliSEI

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Re: Early Sandcast Found......
« Reply #1413 on: September 02, 2024, 10:25:35 AM »
Someone asked about the small inline fuel filters? Here’s the pair I’m using on this for a while…… For some reason, lots of people have trouble when they install them. I’ve had a set on my K1 for a few years and they work fine. Despite my best efforts, I’m sure there is still some crap in this 55 year old tank. Bit of extra insurance. Carbs are spotless and I want them to stay that way! When the “belly” of the filter darkens up, time to change them out.
« Last Edit: September 02, 2024, 10:29:33 AM by BenelliSEI »

Offline CycleRanger

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Re: Early Sandcast Found......
« Reply #1414 on: September 02, 2024, 10:28:02 AM »
Can you post a photo of the two types of tank badge?
I believe the early badges are slightly shorter in length than the later badges.
Do you have a copy of the Honda Shop Manual or Parts List for your bike? Get one here:
https://www.honda4fun.com/materiale/documentazione-tecnica
CB750K5        '79 XL250s     CL350K3
CB750K3        '76 XS650      '76 CJ360T

Offline BenelliSEI

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Re: Early Sandcast Found......
« Reply #1415 on: September 02, 2024, 10:37:07 AM »
Can you post a photo of the two types of tank badge?
I believe the early badges are slightly shorter in length than the later badges.

I’ve never measured. I will.

Offline BenelliSEI

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Re: Early Sandcast Found......
« Reply #1416 on: September 02, 2024, 01:25:29 PM »
Can you post a photo of the two types of tank badge?
I believe the early badges are slightly shorter in length than the later badges.

You are correct! About 8mm.

Offline BenelliSEI

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Re: Early Sandcast Found......
« Reply #1417 on: September 02, 2024, 01:26:47 PM »
The list is getting VERY short. Tonight I need to touch up the badge for the other side of the tank…….

Offline newday777

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Re: Early Sandcast Found......
« Reply #1418 on: September 02, 2024, 04:24:17 PM »
"For some reason, lots of people have trouble when they install them."

How they have run the fuel hoses is usually the problem,  not having an all downhill slope without any uphill to get to the carb inlet tees. I've seen hoses that dipped below the inlet tees and bowls to put the filters on the backside of the carbs. You have properly run your hoses John havingthefilters up on top(hopefullythey don't get vapor lock from the heat that close to the head).
Putting the hoses below the bowls is a problem in the waiting to interrupt the flow of gas, especially at speed.
Stu
Honda Parts manager in the mid 1970s Nashua Honda
My current rides
1975 K5 Planet Blue my summer ride, it was a friend's bike I worked with at the Honda shop in 76, lots of fun to be on it again
1976 K6 Anteres Red rebuilding project, was originally my brother's that I set up from the crate, it'll breath again soon!
Project 750s, 2 K4, 2 K6, 1 K8
2008 GL1800 my daily ride and cross country runner

Prior bikes....
1972 Suzuki GT380 I had charge of it for a year in 1973 while my friend was deployed and learned to love street riding....
New CB450 K7 after my friend returned...
New CB750 K5 Planet Blue, demise by ex cousin in law at 9,000 miles...
New CB750 K6 Anteres Red, to replace the totaled K5, I sold this K6 at 45k in 1983, I had heavily modified it, many great memories on it and have missed it greatly.....
1983 GL1100A, 1999 GL1500 SE, 1999 GL1500A

Offline BenelliSEI

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Re: Early Sandcast Found......
« Reply #1419 on: September 02, 2024, 06:48:58 PM »
"For some reason, lots of people have trouble when they install them."

How they have run the fuel hoses is usually the problem,  not having an all downhill slope without any uphill to get to the carb inlet tees. I've seen hoses that dipped below the inlet tees and bowls to put the filters on the backside of the carbs. You have properly run your hoses John havingthefilters up on top(hopefullythey don't get vapor lock from the heat that close to the head).
Putting the hoses below the bowls is a problem in the waiting to interrupt the flow of gas, especially at speed.

Stu….. Understood. I actually added a small (invisible) tie that keeps the two lines and the filters, closer to the carbs than the head. It does keep everything running downhill all the way. Using that good Honda hose helps. Nice gentle bends ensures no restriction by the hose too. When the petcock bowl runs clean, I’ll definitely remove those extra filters.

Offline newday777

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Re: Early Sandcast Found......
« Reply #1420 on: September 02, 2024, 08:37:12 PM »
"For some reason, lots of people have trouble when they install them."

How they have run the fuel hoses is usually the problem,  not having an all downhill slope without any uphill to get to the carb inlet tees. I've seen hoses that dipped below the inlet tees and bowls to put the filters on the backside of the carbs. You have properly run your hoses John havingthefilters up on top(hopefullythey don't get vapor lock from the heat that close to the head).
Putting the hoses below the bowls is a problem in the waiting to interrupt the flow of gas, especially at speed.

Stu….. Understood. I actually added a small (invisible) tie that keeps the two lines and the filters, closer to the carbs than the head. It does keep everything running downhill all the way. Using that good Honda hose helps. Nice gentle bends ensures no restriction by the hose too. When the petcock bowl runs clean, I’ll definitely remove those extra filters.
👍
Stu
Honda Parts manager in the mid 1970s Nashua Honda
My current rides
1975 K5 Planet Blue my summer ride, it was a friend's bike I worked with at the Honda shop in 76, lots of fun to be on it again
1976 K6 Anteres Red rebuilding project, was originally my brother's that I set up from the crate, it'll breath again soon!
Project 750s, 2 K4, 2 K6, 1 K8
2008 GL1800 my daily ride and cross country runner

Prior bikes....
1972 Suzuki GT380 I had charge of it for a year in 1973 while my friend was deployed and learned to love street riding....
New CB450 K7 after my friend returned...
New CB750 K5 Planet Blue, demise by ex cousin in law at 9,000 miles...
New CB750 K6 Anteres Red, to replace the totaled K5, I sold this K6 at 45k in 1983, I had heavily modified it, many great memories on it and have missed it greatly.....
1983 GL1100A, 1999 GL1500 SE, 1999 GL1500A

Offline 71 V12

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Re: Early Sandcast Found......
« Reply #1421 on: September 03, 2024, 09:03:48 AM »
Someone asked about the small inline fuel filters? Here’s the pair I’m using on this for a while…… For some reason, lots of people have trouble when they install them. I’ve had a set on my K1 for a few years and they work fine. Despite my best efforts, I’m sure there is still some crap in this 55 year old tank. Bit of extra insurance. Carbs are spotless and I want them to stay that way! When the “belly” of the filter darkens up, time to change them out.

Thank you for posting the photos of the fuel line routing, just seems odd that the lines are not retained by anything and so close to the choke operating mechanism.

Very discreet little filters, I have looked but can’t find them. Would you be able to post a link?

Regards,

Kevin

Offline BenelliSEI

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Re: Early Sandcast Found......
« Reply #1422 on: September 04, 2024, 05:25:35 AM »
Kevin…… I pick the fuel filters up at a local lawn mower/ small engine repair shop. The guy keeps a box of them on the counter and gives them away to paying customers or $0.99 each.

The lines lay nicely in place, because they are new, Honda hose. I also have an invisible tie holding the one from carbs #1 and #2 down against the carb plate so it can’t get near the choke mech.

Offline BenelliSEI

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Re: Early Sandcast Found......
« Reply #1423 on: September 04, 2024, 05:30:41 AM »
Yesterday I had to correct my own stupid mistake. When I added fuel to the tank, my painstakingly restored petcock started pissing fuel everywhere. And not just a bit. Cleaned up and opened it up to see what faulty part was to blame.

Imagine my surprise when I found the “wavey washer” UNDER the lever disc instead of ON TOP of it. There’s an idiot in my shop and apparently it’s me!

Good news is I’m done.

Offline Stev-o

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Re: Early Sandcast Found......
« Reply #1424 on: September 04, 2024, 08:23:59 AM »
I would have to think long and hard about removing that dent..
 Every mark on an original bike had a story, part of its life.. it adds character. . And it reflects it being used..And a life lived..
 A shiny restored bike.. it just looks new and perfect.. no stories.. sort of sterile. . Almost like kept in a box and not taken out..

 Ever take a look at early original bikes from the 20,s and down... usually worth more than the restored ones..
 So yeah on this one , you can harm the value by restoring it, plus  deplete your savings.

Even though Frank did not want the dent removed, it was the right thing to do and he would now approve!

Great job, John....start to finish 3 years, 6 months [with breaks]
'74 "Big Bang" Honda 750K [836].....'76 Honda 550F.....K3 Park Racer!......and a Bomber!............plus plus plus.........