Topic: 1973 CB750 Project Unknown

[Rookster]

The front suspension is done.  New steering bearings, tubes, seals, progressive springs, and adjustable fork caps. The progressive springs come with spacers that are a bit too long for my taste.  I used 1/2 inch shorter spacers with the progressive springs in my K1 and they seem just about right.  So for this bike I went with adjustable fork caps and shorter aluminum spacers.  When I have it set to the full in position, it is the same as the length of the spacer that comes with the springs.  This should give some nice level of adjustment.  The caps themselves are nicely made but the O rings were too large.  So I used genuine Honda O rings and put thread sealer on the adjuster screws. 





The look of the front end was influenced by custom Triumphs from the early 70s.  I made a bracket to hold a single instrument.  The handlebars are Triumph T140 US bars.  The top tree and lower kegs are brushed.  The headlight is a Lucas copy and the fork ears are repro Tommaselli. 







Front brakes are next on the list.  The calipers have been vapor blasted and I have new pistons and seals.  I still need an extra disk and some fittings and lines. 

Scott

[BenelliSEI]

Looking good. Did you make the adjustable caps or buy them?

[Rookster]

I bought them.  They are the cheap ones that they sell on ebay.  The ones for the sohc CB750 aren't that cheap though.  They cost me about $55.  I had been looking at the ones from TTR400 but the price was more than I wanted to spend. I came across this video review of them.  I had to replace the O rings with genuine Honda ones because the ones that came with were too large.  As a precaution I also used paste thread sealer on the adjusters. 

eBay listing
https://www.ebay.com/itm/196033405385

Review

Scott

[BenelliSEI]

Thanks! May try a set.

[CB_Jeff]

Hi Scott,
Good to see you back at it with a new project - reminds me of a K4 I picked-up in 2020, also too far gone for a resto.  I need to back to it. 
I like the direction you are going in and look forward to following your build.  Let me know if you get in a pinch with parts, I have some spares.

[Godffery]

 Hey Scott,
Just checked out your build thread.  Looks like your making some good progress and I'll be interested to watch it develop!
Thanks for sharing with the group!

 Godffery~

[Rookster]

Thanks for the kind words guys.

Did some caliper rebuilds for a dual disk set up.  The calipers were vapor blasted.  New pistons, seals, line ferules, speed bleeders and -3an adapters.









Scott

[Rookster]

I picked up a Ness Digger Fender a few weeks ago.  It was full of holes from previous mounting.  I filled the holes with fiberglass resin and used fiberglass cloth on the underside of the fender.  It still needs to be sanded and prepped for primer.  I got it mounted up and I like the look.  I also put some lowering blocks on it to drop the fender closer to the tire.  I don't think I will keep it this way but probably get shorter shocks instead.  The seat pan just has an old Triumph seat cover sitting on it for now.  I plan to do a basic slim seat that follows the lines of the pan.  I might even use the Triumph cover. 







Scott

[Dime]

Looking great

[BenelliSEI]

Looks good. I’d go for the lower shocks. I never liked those “blocks”.

[MauiK3]

Great project, still following.

[Rookster]

Thanks for the encouragement. I picked up one of these Speedo drive adapters from eBay for the dual disk front end.  I modified a stock one with the bent edges but I wasn't happy with it so I thought I would give this a shot.  It worked great.  I used a disk to set up where to drill the holes.  Then it was just a matter of drilling the hub on the drill press and taping the holes for 4mm.  That's it for now.  Next up is figuring out a battery box and building a wiring harness.







Scott

[Godffery]

 Well I'll be Darned...  I've been making that same Kit for years, I wounder if he copied me or just had the exact same idea? 
  BTW; how much did he charge for that one?

[Rookster]

I paid about $40.00.  That included shipping to NY.

Scott

[Godffery]

I paid about $40.00.  That included shipping to NY.

Scott

Hmm, Even the price is the same.?!