Topic: Squirley's CB750 Cafe Project

[Retro Rocket]

18"s front and rear sounds like a good idea for future rubber choices and stance.

Yes, there's some good tires in those sizes these days, check out the new Continentals in 18's....

[Godffery]

I am in the process of welding in some frame clamps for easy head access.  Can anyone tell me a measurement of how much tube needs to be removed so I don't have to fit the motor back in the bike? My plan is to take off about 2 more inches on the tube coming from the head tube. Any help would be greatly appreciated. Thanks

To be sure you have enough room, I suggest cut so you have about 3" left from ether end.  Here is a link to some detailed pix :
http://www.vinmoto.org/gallery/v/VinMoto-Garage/album03/Godfferys-Garage-123/RVs+750/Fraim+Kit/

[squirley]

Thanks for the opinions guys! I went ahead and ordered the sizes I called out in some Avons! should be here Monday!

Goddfery, thank you very much for those dimensions, they are most helpful!

Jens

[squirley]

Godffery thanks for the measurements, I was able to get the frame rails welded in completely.


I also made some headway on the tank.  I have been postponing finishing the last panels on the tank, but I finally took some time to cut some patterns and fully weld it up.  Still have some final sanding to do but came our ok

[SOHC4 Cafe Racer Fan]

Nice fab work on the tanks.

[01Thomas]

The tank looks good, but... I just know you're going to love that front suspension!

I upgraded my 1981 Guzzi SP1000 with a set of forks and brakes from a 2005 Yamaha R1 and boy o boy! I now have handling and comfort.

[jojo]

looking super nice 

[squirley]

Thanks guys!

Getting my rubber mounted today so I can get a roller going and set my shock positions.
I am about to order some sprockets for both builds and am curious what some suggest for rear tooth count.

First build has a fresh 836 motor, cr carbs, etc., what tooth count rear sprocket do you suggest?

Second build is a stock motor with exhaust.

Any help would be greatly appreciated.

Thanks again

Jens

[squirley]

Made a little progress these last two nights.  Yesterday I was able to get the under seat tabs and weld nuts welded in for the under seat panel that I will soon make.  Tonight I was able to make some headway on my battery tray.   I hope I don't regret welding in the tray as I like to make them bolt in but we shall see.  I am also laying the battery flat along the seat as the battery needed for the 750 is a monster!.   The battery in the pics is not a sealed unit but I a yuasa is on the order list.  Next up will be to make mounting tabs for electronics

Bottom welded in tray support


Bottom tray with top clamp tray


Holding down a battery




Side view of assembly


Thanks for checking in guys!

Jens

[Godffery]

Look'n good.

You ever send them Calipers?  If so, I haven't seen'em yet.

[squirley]

So a few small things to update here....

First off I made a set of headlight ears to accomodate the large diameter forks...there isn't a good selection of these on the market.



Next up I finished off the upper shock mounts.  The dowels are 1/2" DOM tubing with a .12" wall, the ends are tapped for an m8.  Dowels are welded on inside and outside of tab.  If anyone has doubt on the strength, please let me know!

Back side of dowel


Outside of dowel with m8 flat head and a conical washer


How the shock bolts up



And a fist stage mockup... The rear, lower shock mounts will be moved forward to make the shocks parallel with the rear engine cradle tube.  I am crossing my fingers that this does not start to have the "street fighter" look.


Any question or concerns, give me a shout!  Thanks for checking in!

Jens

[babyfood1217]

Beau-T-Ful

[Godffery]

It would have helped if the dowels were solid and just drilled & tapped on the ends.
But, you could tap it all the way through now and use a long enough bolt to pass through frame area. That is where you will need the most strength.

BTW; your welding is looking very good!

[calj737]

I think the tubing/dowel is a beautiful solution to the dreaded, threaded bung. I hate Acorns.... But, why the dowel on the backside of the plate? The conical washer finish is elegantly simple and is a gorgeous aesthetic with the shocks. Very modern/industrial.

Which brand of shocks are those? Look like YSS....

[RustyOlive]

Dam Jens!
Looks great! Those mounts look stronger than any stock ones. Shouldn't have any issues.
However. Moving the lower mounts forward will raise the rear and shorten the trail and decrease the steer tube rake right?

[Tews19]

So a few small things to update here....

First off I made a set of headlight ears to accomodate the large diameter forks...there isn't a good selection of these on the market.



Next up I finished off the upper shock mounts.  The dowels are 1/2" DOM tubing with a .12" wall, the ends are tapped for an m8.  Dowels are welded on inside and outside of tab.  If anyone has doubt on the strength, please let me know!

Back side of dowel


Outside of dowel with m8 flat head and a conical washer


How the shock bolts up



And a fist stage mockup... The rear, lower shock mounts will be moved forward to make the shocks parallel with the rear engine cradle tube.  I am crossing my fingers that this does not start to have the "street fighter" look.


Any question or concerns, give me a shout!  Thanks for checking in!

Jens

Fork headlight bracket looks great! HMMM----- Interested in selling a set? I could really use your great craftsmanship to improve my build...

If you do not mind I will copy your rear shock mounting idea.. Looks great

[squirley]

Thanks for the input fellas!

Godffery, a solid rod would have been better but this is what I had on hand.  However, I don't want to be a "build with what I have on hand is good enough" kind of builder... I did some quick deflection calculations and everything looked ok to me.  Do you have doubts on this set up?
On a side note, I have not been able to send off the calipers... Look for them early next week.


Calj737, the excess tubing on the back of the mounting tab will be removed and then sanded down to a smaller nub.  I chose to leave it protruding so I could lay a nice large bead on the back side. 
As for the shocks, the ones in the first pics are Works Performance shocks.  The shocks used for the complete mockup are some cheap "under $100" specials which will not be used for the final product.

RustyOlive,  I totally understand your advice.  The plan is not to use the existing shocks on the bike in the final rendition.  I will move the lower mounts forward, find my desired ride height, then order the appropriate shock lengths.

Tews, unfortunately I don't have any time right now to produce parts for others.  I will keep you posted if I find that I can sling a few pieces.  By the way, your build is coming along very nicely!

Jens
 

[Godffery]

   The area of the dowels that would concern me most, are where it is welded into your solid stock; the majority of the shear load will be at that point and the combination of it being hollow & heated from the weld makes it susceptible. 
As appose to my earlier suggestion of tapping it threw and using a long bolt; you could drive a solid pin in the back I.D. till it hits the end of the bolt, then weld it in permanent. As long as it’s in there far enough to pass through the outer welded area, it should increase the rigidity.

As for the Calipers, just give me a heads up when there on their way.

[Godffery]

   One other note:
You may want to ad a gusset behind the shock mount to help support the flex and vibration you will get in the back loop with the battery weight.

[squirley]

Haha Godffery, we are on the same page.  I turned down a solid dowel and press fit it in the back of shock mount tube then welded it in the butt end.  I was tired of questioning myself and want this thing to be completely safe especially since I will not be the one riding it.
I also have made some small triangular support tabs that will be welded from the shock mount plate to the upper tube support right above it.  I just haven't welded them in yet because I wanted complete access to the back side of the shock mount for welding.

Jens

[Godffery]

Oh no...! Your starting to think like me!

[jojo]

Thanks for the input fellas!

Godffery, a solid rod would have been better but this is what I had on hand.  However, I don't want to be a "build with what I have on hand is good enough" kind of builder... I did some quick deflection calculations and everything looked ok to me.  Do you have doubts on this set up?
On a side note, I have not been able to send off the calipers... Look for them early next week.


Calj737, the excess tubing on the back of the mounting tab will be removed and then sanded down to a smaller nub.  I chose to leave it protruding so I could lay a nice large bead on the back side. 
As for the shocks, the ones in the first pics are Works Performance shocks.  The shocks used for the complete mockup are some cheap "under $100" specials which will not be used for the final product.

RustyOlive,  I totally understand your advice.  The plan is not to use the existing shocks on the bike in the final rendition.  I will move the lower mounts forward, find my desired ride height, then order the appropriate shock lengths.

Tews, unfortunately I don't have any time right now to produce parts for others.  I will keep you posted if I find that I can sling a few pieces.  By the way, your build is coming along very nicely!

Jens

Im with Tews on this one. I would buy a set of those headlight ears. I havent been able to find much online.

[squirley]

I love getting new stuff!!!!!

[SOHC4 Cafe Racer Fan]

Those Works shocks are cafe porn.

[Flying J]

Looking good Jens. Glad to see you back working on a honda. Ill be following along.