Author Topic: Squirley's CB750 Cafe Project (Read 34807 times)

squirley · « **on:** September 16, 2013, 10:38:15 AM »

Hey guys, its been a while since I have been a contributor to this board. So long in fact that it somehow convinced me to start another project.....yeah.......
Since I have enough bikes already haha, I am building this up for my brother who has been asking me to build him a bike for a while now. Project timeline is unknown, but for those who have followed my builds in the past know not to hold their breath...
I just finished up my last project a few months ago so I picked up a frame and motor for this next project. This beauty is a 1976 super sport. Plans are to keep the classic racer lines with a modern front end. It will bear several similarities with the 550 I built a few years ago.

Past 550 project

H1 Project that I just finished

So not much to report yet as I have been detabbing the frame and trying to get the new rear section laid out...here's the progress

Welded in some corner braces

The rear shock mounts are 1/2" solid pucks, not my first choice but the positioning of these upper shock mounts always proves to be a royal pain when building a new rear section

View from the back of the new frame rails and shocks

Where the direction is headed

cabrala · « **Reply #1 on:** September 16, 2013, 11:09:01 AM »

Very interested in following this project. Subscribed.

danfr · « **Reply #2 on:** September 16, 2013, 11:10:03 AM »

subscribed.

Ewan 500K1 · « **Reply #3 on:** September 16, 2013, 12:11:59 PM »

hey squirley, that 550 was a lovely build. Any idea what the effect on front end rake and trail geometry was with those long rear shocks... been getting a bit of stick myself and warned of tank slappers and a twithchy rear end due to putting 14 and a half inch rear shocks on my 500

jojo · « **Reply #4 on:** September 17, 2013, 10:30:35 PM »

Quote from: squirley on September 16, 2013, 10:38:15 AM

Hey guys, its been a while since I have been a contributor to this board. So long in fact that it somehow convinced me to start another project.....yeah.......
Since I have enough bikes already haha, I am building this up for my brother who has been asking me to build him a bike for a while now. Project timeline is unknown, but for those who have followed my builds in the past know not to hold their breath...
I just finished up my last project a few months ago so I picked up a frame and motor for this next project. This beauty is a 1976 super sport. Plans are to keep the classic racer lines with a modern front end. It will bear several similarities with the 550 I built a few years ago.

So not much to report yet as I have been detabbing the frame and trying to get the new rear section laid out...here's the progress

View from the back of the new frame rails and shocks

do the end of the frame rails need to be sealed off and welded or can i leave them open and exposed like in the pic?

squirley · « **Reply #5 on:** September 18, 2013, 08:01:21 AM »

Ewan,
The longer shocks to a point had a beneficial effect on the handling. I never gave it a chance to experience any tank slappers as I fitted a steering stabilizer almost immediately and I would suggest you do the same if increasing your rear shock length (although may not be necessary). To be honest, if you have the shocks on hand, slap them on and see how they handle...

Jojo,
You are going to want to seal off the end of the tubes so water and grime cannot enter the frame. I have yet to close mine off as I will be adding a wrap around tube to follow the seat contour.

Jens

Elan · « **Reply #6 on:** September 18, 2013, 08:14:07 AM »

nice!

Ewan 500K1 · « **Reply #7 on:** September 18, 2013, 09:31:02 AM »

Quote from: squirley on September 18, 2013, 08:01:21 AM

Ewan,
The longer shocks to a point had a beneficial effect on the handling. I never gave it a chance to experience any tank slappers as I fitted a steering stabilizer almost immediately and I would suggest you do the same if increasing your rear shock length (although may not be necessary). To be honest, if you have the shocks on hand, slap them on and see how they handle...

cheers, I'm dampered now... but not on the road yet .. still got some work to do.

RustyOlive · « **Reply #8 on:** September 20, 2013, 10:39:38 AM »

Well its about time Jens!! Hahaha

Always enjoy following your builds.

lol

ogsmakdade · « **Reply #9 on:** September 20, 2013, 11:06:06 AM »

your welds look fantastic, I'd love to own that skill.

jojo · « **Reply #10 on:** September 20, 2013, 11:18:23 AM »

Quote from: ogsmakdade on September 20, 2013, 11:06:06 AM

your welds look fantastic, I'd love to own that skill.

what he said ^^^

Tews19 · « **Reply #11 on:** September 20, 2013, 07:19:05 PM »

Subscribed!

FrankenFrankenstuff · « **Reply #12 on:** September 20, 2013, 07:27:25 PM »

Hurley engineering is back to the forum! Long time.

squirley · « **Reply #13 on:** September 27, 2013, 11:44:19 AM »

Thanks for the warm welcome back fellas!

So not much new to report, still working on the back frame hoop...I'm actually building up two 750's at the same time so each step takes twice as long.

I am trying to figure out where to mount the oil tank. Has anyone made a low profile, rectangular box that fits below the carbs? Does anyone see a problem with this location?

RustyOlive · « **Reply #14 on:** September 27, 2013, 12:59:27 PM »

Quote from: squirley on September 27, 2013, 11:44:19 AM

Thanks for the warm welcome back fellas!

So not much new to report, still working on the back frame hoop...I'm actually building up two 750's at the same time so each step takes twice as long.

I am trying to figure out where to mount the oil tank. Has anyone made a low profile, rectangular box that fits below the carbs? Does anyone see a problem with this location?

Don't think I've seen a oil box there... Have however seen one or two built into the swing arm. Come to think of it... Might have been WrenchMonkeys that did it.

Retro Rocket · « **Reply #15 on:** September 27, 2013, 04:25:45 PM »

Nice TIG work squirley

squirley · « **Reply #16 on:** October 03, 2013, 09:18:18 PM »

Thanks guys!

So as usual, had just a few hours to work on the bike this week...My apologies for the boring update haha.

Milled up some rear set brackets

Plugged the frame hoes where the original upright connected, and got the brackets aligned and tacked on

Then fully welded them up

Jens

Tews19 · « **Reply #17 on:** October 03, 2013, 09:24:12 PM »

Squirley would you be interested in making a me a set for my 550 build? The rear set brackets that is.. I would send you payment right away!

Toxic · « **Reply #18 on:** October 04, 2013, 05:04:00 AM »

Geez ... nice stack of dimes. You have some serious skills .... looking forward to this one .

Killer H1

Roach Carver · « **Reply #19 on:** October 04, 2013, 06:06:53 AM »

nice work!

Tews19 · « **Reply #20 on:** October 04, 2013, 06:42:34 AM »

Squirley, if you wouldn't mind also possibly making the upper mounts you made for the upper shocks?

Or if you could measure your bottom brackets for the rear sets I know I can get them made up from a family member... Shoot, even if you could trace and send via email/postal that would be great. I would compensate you monetarily!

SOHC4 Cafe Racer Fan · « **Reply #21 on:** October 04, 2013, 07:42:33 AM »

Nice looking welds.

01Thomas · « **Reply #22 on:** October 04, 2013, 09:27:41 AM »

There are photos of the original Bimota HB-1 (sohc 750) which had an oil tank in front of the crankcase, surrounding the oil filter. Later photos of the HB-1 had the oil tank back in a more conventional place.

Regards
Thomas

Quote from: squirley on September 27, 2013, 11:44:19 AM

Thanks for the warm welcome back fellas!

I am trying to figure out where to mount the oil tank. Has anyone made a low profile, rectangular box that fits below the carbs? Does anyone see a problem with this location?

RustyOlive · « **Reply #23 on:** October 04, 2013, 12:49:45 PM »

Oh wow!! Slick thinking 01Thomas.
How hard would it be to find one of those eh? But very interesting thought.

Found this photo incase others are wondering. Lol

SOHC4 Cafe Racer Fan · « **Reply #24 on:** October 04, 2013, 01:43:18 PM »

Quote from: RustyOlive on October 04, 2013, 12:49:45 PM

Oh wow!! Slick thinking 01Thomas.
How hard would it be to find one of those eh? But very interesting thought.

Found this photo incase others are wondering. Lol

Cam,
Very interesting. I bet any surviving tanks are hard to find.

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Author Topic: Squirley's CB750 Cafe Project (Read 34807 times)