Author Topic: NEW Cal Fab swingarms for the 750 (Read 35709 times)

Retro Rocket · « **Reply #25 on:** January 16, 2015, 02:38:59 PM »

Chris at MotoGP werks is now offering chromoly axles to go with these excellent swingarms at NO EXTRA COST, they are supplied FREE with the purchase of his new swingarms, this is for 500/550/750 SOHC models.... He also has exhaust header inserts for the same models, check it out at the Motogpwerks facebook page...

Retro Rocket · « **Reply #26 on:** February 11, 2015, 04:38:25 PM »

More great parts coming from Motogpwerks soon, trick brakes for the stock forks, complete with brackets for the conversion, more old school goodness...

Quote

Spondon replica's ...
I'm building these calipers , in die cast (OEM sand casting ) to stop flexing like in the AP brake calipers .
There will be a race version in magnesium (limited numbers ) be working on this project for a couple of months ...
Brackets will be available for CB750 (stock forks) ,all GS and Z1/KZ

bwaller · « **Reply #27 on:** February 11, 2015, 05:53:17 PM »

Yes Mick, I saw a wax prototype. More goodies indeed.

Retro Rocket · « **Reply #28 on:** February 11, 2015, 06:01:13 PM »

Quote from: bwaller on February 11, 2015, 05:53:17 PM

Yes Mick, I saw a wax prototype. More goodies indeed.

I'm in the process of getting one of the swingarms ATM...

slikwilli420 · « **Reply #29 on:** February 11, 2015, 06:47:15 PM »

Any more detail on the brake bits? I need something really tasty and different for my new project.

MRieck · « **Reply #30 on:** February 11, 2015, 07:00:57 PM »

Are the axles hollow?

Retro Rocket · « **Reply #31 on:** February 11, 2015, 11:26:50 PM »

Quote from: slikwilli420 on February 11, 2015, 06:47:15 PM

Any more detail on the brake bits? I need something really tasty and different for my new project.

I'll keep this thread updated as I hear more...

Quote from: MRieck on February 11, 2015, 07:00:57 PM

Are the axles hollow?

Not too sure Mike, they are Chromoly though.....

Retro Rocket · « **Reply #32 on:** February 12, 2015, 05:46:57 PM »

Just ordered my swingarm, I'll answer any questions on it once it arrives....

Ordering on of the first five would be advisable if you are thinking about getting one of these swingarms, the price will probably go up a bit due to now adding a brake arm and Chromoly axle..

Quote

CALFAB.......
CB750 SOHC swingarms at last..These are the only ones that receive heat treating & cryo ,Full alloy swingarm with
- bronze bushings
-chain adjusters
-swingarm bushings
-billet brake arm
- 4130 chromoly rear axle ...
One time price (to keep my word) $650.00 cash ,Retail $899+ extras
Limited to just 5x

754 · « **Reply #33 on:** February 12, 2015, 08:53:24 PM »

Does the axle have a welded on nut, or threaded each end?
Plated or not?
Precision shafting with threaded ends or turned out of a larger diameter piece?

Retro Rocket · « **Reply #34 on:** February 12, 2015, 09:09:08 PM »

Looks like they are solid with a nut welded on one end, I don't know that for sure but here's a pic of them being made...

754 · « **Reply #35 on:** February 12, 2015, 09:30:06 PM »

That's how I made some. Precision shafting with threaded ends, sometime when we welded the nut. We would get a bit of cracking on chrome molyj

Retro Rocket · « **Reply #36 on:** February 12, 2015, 09:46:55 PM »

Quote from: 754 on February 12, 2015, 09:30:06 PM

That's how I made some. Precision shafting with threaded ends, sometime when we welded the nut. We would get a bit of cracking on chrome molyj

I'm pretty comfortable with Chris's work, the swingarms are heat treated and cryo treated, I doubt he would put a second rate axle together... Could the axle be hollowed out successfully..? Just curious..

calj737 · « **Reply #37 on:** February 13, 2015, 04:04:48 AM »

It could, but why bore it instead of using tubing? The interior dimension is not tolerance critical so standard tubing turned down on the outside would be a good choice if you wanted hollow. It appears they are solid rod with threads cut in the lathe. CroMo is already lighter and stronger than standard steel. If he wanted lightest, he would have used alloy, but the strength would then be questionable relative to CroMo in this application.

I'm with you, Retro, looks like it was done well and to a high standard.

754 · « **Reply #38 on:** February 13, 2015, 07:38:00 AM »

Sometimes we just red loctite the non moving nut on.

How do you figure chrome molyj steel is lighter that other steels?..as far as I know it is not.

It does however. Have Higher Strength to Weight ratio, thus allowing thinner tubing (frame is a classic example ) thus resulting in weight savings.

calj737 · « **Reply #39 on:** February 13, 2015, 08:34:00 AM »

Strength to weight ratio, Frank. A CroMo tube or rod of equal dimensions will weigh less than a comparable steel piece. If you do get equal weighted pieces, the CroMo will be stronger as it will have larger dimensions.

Retro Rocket · « **Reply #40 on:** February 13, 2015, 03:27:38 PM »

Woo hoo, its on its way...

754 · « **Reply #41 on:** February 13, 2015, 07:19:46 PM »

How much were they? Could maybe actually. Get one these days.. Stars might be aligned..

Retro Rocket · « **Reply #42 on:** February 13, 2015, 07:31:01 PM »

Quote from: 754 on February 13, 2015, 07:19:46 PM

How much were they? Could maybe actually. Get one these days.. Stars might be aligned..

For the first 5, $650 USD, they were originally going to be sold as just the swingarm at $650, these 5 have axle, brake adjusters and brake arm as well as heat treatment and cryo treatment, not to sure what is happening with the second batch...

Retro Rocket · « **Reply #43 on:** February 24, 2015, 03:22:55 PM »

Swingarm arrived yesterday...

kmb69 · « **Reply #44 on:** February 24, 2015, 03:35:00 PM »

Mine arrived last week as well. BEAUTIFUL piece of work. Axle is solid but the whole thing is several pounds lighter than the stock parts.

Retro Rocket · « **Reply #45 on:** February 24, 2015, 03:36:52 PM »

Looks to be plenty of room for larger wheel/tire combo's as well....

Kingmambo · « **Reply #46 on:** February 26, 2015, 07:08:34 AM »

Those swingarms look great. He could label them as "Artisanal" or "Organically Cryogenically Treated" and get the waxed-mustache crowd to pay $2,000 for them!

creepxstreet · « **Reply #47 on:** March 02, 2015, 07:34:42 AM »

Got mine and it's on the bike already. Going with a cbr f3 rear wheel, brake, and 160 tire. The cbr assembly fit perfect with no spacers and I'm going to need 2 small spacers to center the arm in the frame. With the arm centered, the wheel is offset 3/8s to the right and I will need a 3/8s offset sprocket. Bike already has a complete gsxr 1000 front end on it.

I called Chris on Saturday to confirm fitment after getting it in and seeing that it will require spacers and he said his mockup bike was a 72. My bike is a 75 K. I'm not sure if or when the swing arm dimensions changed or if my bike is just a little goofy. It won't take a large spacer probably 3/16 an inch on each side. I'll be back at the shop later this week to finish those and mount foot controls (thinking high mids like a pro flat track bike) and I'll be able to get solid measurements.
Here's my bike.

Cougars750F0 · « **Reply #48 on:** March 02, 2015, 08:13:01 AM »

Is there a swingarm for the 750 F0 through F3 Model's?

Elan · « **Reply #49 on:** March 02, 2015, 08:22:19 AM »

It would be awesome if they made a version for eye-to-eye shocks.

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Author Topic: NEW Cal Fab swingarms for the 750 (Read 35709 times)