Topic: Dorothy III - CB750

[Stev-o]

You apply for a patent?!

[70CB750]

You apply for a patent?!

No, I will return my engineering degree; it should have been obvious from the very beginning 

[calj737]

Nobody ever accused engineers of being practical thinkers 

[RAFster122s]

Cool!  Go Prokop go.

[70CB750]

Thank you 

There is nothing like complete tear down to understand what is inside. 

Also my first real job ever was production engineer in die and tool factory; we made molds for casting aluminum, including molds for Yezdi:

https://en.wikipedia.org/wiki/Yezdi_Roadking

but the Honda cast is pretty amazing.  You can see some flow problems here and there, still hard to believe they molded them in sand in actual production - even limited production.

[70CB750]

Hanging continues, need the space and resources for other projects.

[MoMo]

So you got hung out to dry???






bad jokes are my forte, hope all is well...larry

[RAFster122s]

I think he just wants a well hung motor.

[70CB750]

Ha!  Very good. All I could come up was hanging my spurs or hanging my guns

The rest of Dorothy is wrapped and labeled and stored.

[Stev-o]

The rest of Dorothy is wrapped and labeled and stored.

Waiting for a rainy day?

[oldhatt45]

Sure hope it wasn't a lynching party we weren't invited to.

Charlie

[Stev-o]

Sure hope it wasn't a lynching party we weren't invited to.

If it was a lynching of a SOHC, I think the outcome would be different!

[70CB750]

The rest of Dorothy is wrapped and labeled and stored.

Waiting for a rainy day?

Something like that 

[70CB750]

Played some with "modern" bike parts - 1993 VFR fork and brakes.  I was able to mock my "sidecar" wheel together in the VFR fork and VFR brake caliper.  Sidecar wheel is CB750 front wheel with bearings upgraded to ID 20mm.

I never felt like going to 17" wheels on Dorothy, but seems like I have a plan now:

- Custom triple tree, VFR fork and brakes, 19" front wheel with original dual discs - thinned.

- 18" wheel for the back, original swingarm and decent shocks, unless I can find aluminum swingarm that fits 18" wheels. Drum brake for the rear wheel.

- DID rims or aluminum, depends what I can find.

The whole idea is for Dorothy to look like mild custom cafe with performance upgrades hidden in plain sight.

Opinions?

[70CB750]

Seems like Suzuki GS1100 will do:

[calj737]

Are you planning on staying with drum rear and a sidecar?

[70CB750]

Sidecar will be for the K3F.

[calj737]

Mea culpa

[70CB750]

Not at all.   

I want two bikes - one for travelling in two or three or just me a and a dog  - second to ride solo.

[Stev-o]

Have you thought about using a GL front end? Has dual disc and the wheel may be alum[?]

[Retro Rocket]

Seems like Suzuki GS1100 will do:

Info for the GS1100 arm, they have a larger diameter pivot bolt , mods needed to frame to fit, they aren't as wide at the pivot end as the 750 stock are, spacers needed to fit, they are also nearly 4 inches longer. I have one i'm using but it will be shortened at the pivot end to retain stock geometry.. The lower shock mounts are also in a wider position on the GS arm, Brake arm is on the top which works great for a disc application, not so much with drum, more mods needed.  Its no where near a bolt in fit... It is a nice arm though....

[70CB750]

Thank you for the info, much appreciated!

Seems like Suzuki GS1100 will do:

Info for the GS1100 arm, they have a larger diameter pivot bolt , mods needed to frame to fit, they aren't as wide at the pivot end as the 750 stock are, spacers needed to fit, they are also nearly 4 inches longer. I have one i'm using but it will be shortened at the pivot end to retain stock geometry.. The lower shock mounts are also in a wider position on the GS arm, Brake arm is on the top which works great for a disc application, not so much with drum, more mods needed.  Its no where near a bolt in fit... It is a nice arm though....

[Retro Rocket]

Thank you for the info, much appreciated!

Seems like Suzuki GS1100 will do:

Info for the GS1100 arm, they have a larger diameter pivot bolt , mods needed to frame to fit, they aren't as wide at the pivot end as the 750 stock are, spacers needed to fit, they are also nearly 4 inches longer. I have one i'm using but it will be shortened at the pivot end to retain stock geometry.. The lower shock mounts are also in a wider position on the GS arm, Brake arm is on the top which works great for a disc application, not so much with drum, more mods needed.  Its no where near a bolt in fit... It is a nice arm though....

Too easy, I Have a GS1100 arm sitting next to me beside the computer...

[Stev-o]

Thank you for the info, much appreciated!

Seems like Suzuki GS1100 will do:

Info for the GS1100 arm, they have a larger diameter pivot bolt , mods needed to frame to fit, they aren't as wide at the pivot end as the 750 stock are, spacers needed to fit, they are also nearly 4 inches longer. I have one i'm using but it will be shortened at the pivot end to retain stock geometry.. The lower shock mounts are also in a wider position on the GS arm, Brake arm is on the top which works great for a disc application, not so much with drum, more mods needed.  Its no where near a bolt in fit... It is a nice arm though....

Too easy, I Have a GS1100 arm sitting next to me beside the computer...

Bolt that thing up and get a roller going Mick!

[70CB750]

Have you thought about using a GL front end? Has dual disc and the wheel may be alum[?]

Yes I did, but than I found these VFR elements and they seem to be a good choice.  Like those calipers will work with original K discs, headlight brackets I have will fit VFR forks, seems kind of clicking together if you know what I mean.