Topic: CB750 K1 Project

[Justin]

Save yourself some $ and grab a set of these!
http://cognitomoto.com/collections/suspension/products/fox-podium-rc1-rear-shocks

Or these-
http://cognitomoto.com/collections/suspension/products/fox-podium-r-rear-shocks

I think $1300 is about 10x more than I wanted to spend on new shocks, but what do I know about buying them?
Race Tech custom makes them for my weight and riding style and some other factors, but that's a lot of bones to throw down.. I'm almost out of things to sell to keep funding this project!!! There's still quite a bit that needs attention before I can get spendy...

Those FOX shocks look bloody great, I really dig that piggyback shock look.

Is there any value in lowering the bike 1" by choosing the 12.8" eye-to-clevis shocks over the the 13.8"? I think that my bike is already technically lowered in the front because it has the forks from a 78F and I think that the fork tubes are shorter than stock for my 71 frame. The swing arm is also from the same 78F, does anyone know what the dimensional differences are between the swing arm on the 71 and the 78F bikes?

I'm also fairly certain that I want to weld triangles back on to the bike where the PO cut them off. The triangles are for the exhaust/passenger foot pegs to mount. Does anyone have the dimensions on the triangles so I can remake them?

Does anyone out there have the 411 on Yamiya's No Number 4-4 exhaust? Is that comparable to the HM300s that would have been on this bike originally?

Cheers! Any help or information is greatly appreciated!!

[Justin]

Cal/Don/anyone else interested: I also found that 4into1.com sells some aluminum piggyback reservoir shocks that look decent... not sure about the quality as they only have 1 review but they're only $185.00
http://4into1.com/aluminum-adjustable-remote-reservoir-shocks-honda-cb350-cb400f-cb450-cb500-cb550-cb750/

[calj737]

You can be assured that for $185 they're not great quality. Unfortunately, price on suspension items is directly relevant to their quality.

[Justin]

That's what I feared... I'll rock the existing shocks until I can save up for the fox shocks..

Cal, would you recommend the original length shocks by virtue of handling or would it be of any value to choose the 12.8" shocks to lower it?


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[SOHC4 Cafe Racer Fan]

Justin,

In order of cost and quality, you should look at the following:

Hagon (approx. $220)

Progressive ((non-reservoir) approx. $240)

IKON ((rebuildable) approx. $400+)

Works/Race Tech ((non-reservoir, rebuildable) approx. $600)

Fox ((non-reservoir, rebuildable) $655)

Works/Race Tech ((reservoir, rebuildable) approx. $800-$900+)

Fox ((reservoir, rebuildable) $1000)

Works, Race Tech and IKON are built to your specs (weight, length, etc.)

[Justin]

Justin,

In order of cost and quality, you should look at the following:

Hagon (approx. $220)

Progressive ((non-reservoir) approx. $240)

IKON ((rebuildable) approx. $400+)

Works/Race Tech ((non-reservoir, rebuildable) approx. $600)

Fox ((non-reservoir, rebuildable) $655)

Works/Race Tech ((reservoir, rebuildable) approx. $800-$900+)

Fox ((reservoir, rebuildable) $1000)

Works, Race Tech and IKON are built to your specs (weight, length, etc.)

Awesome, cheers Don. I have some original replica type shocks came from cb750supply that are sitting on the workbench at home until the bike is roadworthy, I'll keep saving for the good stuff (fox or race tech).

[Justin]

one of my original brass floats is dented on one side... what could have possibly caused that besides a previous owner?? Does anyone have one in good shape? I have plastic ones to replace all four floats but I would think the original brass ones are better.. ?

[Justin]

Does anyone have measurements of the frame triangles for a k2 or older bike?

The frame triangles I'm talking about are the ones that support the exhaust and passenger foot pegs. The previous owner chopped mine off  and I want to make new ones so I can have the 4-4 exhaust again  .

Also, are there known areas that I can strengthen the frame? I plan on filling in some of the half-arsed welds done at the factory and I've already been busy cleaning up the flash and slag left from the factory welds.  But my question is more directed toward bracing and things of that nature..

Any help or advice is appreciated and will likely be implemented!!! Thanks all!

[Justin]

I bought a 70 cb750 to get some frame measurements from so I can restore the tiny triangles that mount the exhaust and rear passenger pegs.
The guy dropped it off on Sunday at my work, I had a few minutes to muck with it after work today and so I poured some gas into it and then got it started. It seems to run decently. There is no clutch cable but I couldn't resist taking it for a spin.... Here is a video of it running after it warmed up.


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[SOHC4 Cafe Racer Fan]

Not a bad running bike at all!!

[Justin]

Thanks! I think it was a decent find for $1000 (California drives prices up) and I didn't even have to load or unload it. I'm pleased to have a k0 and even more pleased that I could ride it home from work without having to bring my truck up the hill

And it's going to solve a few problems for me. I won't feel so bad about the minor modifications to my K1 now that I have a k0 to restore to factory look


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[SOHC4 Cafe Racer Fan]

$1,000 for a RUNNING, TITLED California bike is a steal!!

[Justin]

I know where there is a k3, complete with hm341s in decent shape for about that much

My k1 was $1100, I bought it running, but the previous owner had scrapped all the goodies and broken the unicorn triple clamp by forgetting the D washers


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[SOHC4 Cafe Racer Fan]

I know where there is a k3, complete with hm341s in decent shape for about that much

My k1 was $1100, I bought it running, but the previous owner had scrapped all the goodies and broken the unicorn triple clamp by forgetting the D washers


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Buy it, flip it for more to fund your build.

[Justin]

Finally back to work on this old girl. moving, travelling, moving again.

There are some goodies in process but some just arrived today!

[SOHC4 Cafe Racer Fan]

Finally back to work on this old girl. moving, travelling, moving again.

There are some goodies in process but some just arrived today!

Nice! 29s I presume.

[Justin]

Finally back to work on this old girl. moving, travelling, moving again.

There are some goodies in process but some just arrived today!

Nice! 29s I presume.

You're spot on mate! In the next couple of weeks I should be receiving the engine bits back and can start assembling it again... FINALLY!!

[Justin]

The SKF bearings came in today. I have to say, I almost feel ripped off. $200 for the 11 bearings that go in the trans/engine cases and I don't feel like they're exactly the best quality bearings... I might order duplicates of everything from someone else and see if I've been had.


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[HondaMan]

The SKF bearings came in today. I have to say, I almost feel ripped off. $200 for the 11 bearings that go in the trans/engine cases and I don't feel like they're exactly the best quality bearings... I might order duplicates of everything from someone else and see if I've been had.


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It's mighty hard to beat SKF bearings for quality! Check closely, though, the little grooves in the bearings to see if they are in the right spot, and the right width. The old JIS standard has given way to the ISO version for the off-the-shelf version of these same part numbers today, and they don't fit correctly on some of them, because of this issue. That siad, I know someone out there is grinding position-correct versions of these in SKF, as I have held some in my hand (they were not mine, sadly...).

[Dunk]

Sounds like a steal on the K0. IMO K1 and earlier bikes should be kept as close to stock as possible. It's hard to find a K1 out here on the east coast and they're usually butchered or no title. Never understood how there can be so many bikes with no known history of title or ownership.

In any event, CycleX fork tubes are prices and sold as a pair. I recently got a pair for my K1 for about $150. I have Ikon rear shocks and am pleased with them. There were weld boogers in the threads I had to clean up upon receiving them, irritated me a bit for the price, but they handle nicely.

[Justin]

Sounds like a steal on the K0. IMO K1 and earlier bikes should be kept as close to stock as possible. It's hard to find a K1 out here on the east coast and they're usually butchered or no title. Never understood how there can be so many bikes with no known history of title or ownership.

In any event, CycleX fork tubes are prices and sold as a pair. I recently got a pair for my K1 for about $150. I have Ikon rear shocks and am pleased with them. There were weld boogers in the threads I had to clean up upon receiving them, irritated me a bit for the price, but they handle nicely.

Cheers, Dunk. Thanks for the interest, mate. Stay tuned and you will see some really good stuff here in the next couple months. The 70 will be restored as stock as possible. My '73 CB750 has plans to be a Daytona CB750 Racing Type replica.
As far as the forks go, I'm going to use the overpriced RaceTech ones, I believe they're TNK or something to that effect.

[Justin]

The SKF bearings came in today. I have to say, I almost feel ripped off. $200 for the 11 bearings that go in the trans/engine cases and I don't feel like they're exactly the best quality bearings... I might order duplicates of everything from someone else and see if I've been had.


Sent from my iPhone using Tapatalk

It's mighty hard to beat SKF bearings for quality! Check closely, though, the little grooves in the bearings to see if they are in the right spot, and the right width. The old JIS standard has given way to the ISO version for the off-the-shelf version of these same part numbers today, and they don't fit correctly on some of them, because of this issue. That siad, I know someone out there is grinding position-correct versions of these in SKF, as I have held some in my hand (they were not mine, sadly...).

Just from first glance, I think the grooves are too narrow... I should be able to put them in one of the lathes though and fix that pretty easily. My issues is that most of them don't spin like I think they should be able to. Unsurprisingly, the one Made in USA bearing that arrived is seemingly the best. One of the bearings came from Italy and the rest are marked Argentina on the outer races. All the boxes say SKF Explorer series.
My gripe is that they don't spin that well and that one or two actually spin off center/too much runout.