Topic: 750a rear brake conversion

[Chillipeppa]

Hi

Has anyone converted their rear brake to left hand lever? If so do you have any info/pics? I have a disability so need to move brake and gear control upstairs.

Thanks in advance.

[scottly]

The Samauto drag bike was fit with a hand rear brake, but I don't know the specifics. Basically, you need to use a clutch master cylinder with a 1/2" to 14mm or so bore, and then run hose back to the brake caliper.

[Chillipeppa]

Thanks for replying. It’s a drum rear brake so assuming I can use a clutch lever from a manual. It’s the rod/cable config I’m not sure about.
Best

[Don R]

 If you fabricate bracket and cable lever attached to where the brake pedal is a clutch cable for tall handlebars should reach. I'm not aware of any cable operated rear brake panels that swap onto a CB750.
 Another possibility is find a long enough cable to go all the way back to the brake lever and fab a cable housing mount bracket to the swingarm.  A lower clutch cable adjuster might come in handy there too.

[scottly]

The John Tickle and similar Dunstall rear-sets were meant to be used with the drum brake, and used a short lever on the end of the splined shaft that replaced the stock foot pedal; perhaps you could use something like that to attach the cable to? You might also look at attaching the cable to the inside of the shaft where the rod attaches, but I don't know if there's enough room? The trick is getting the travel of the cable matched up to the travel of the rod required to operate the brake.

[newday777]

Thanks for replying. It’s a drum rear brake so assuming I can use a clutch lever from a manual. It’s the rod/cable config I’m not sure about.
Best

Welcome aboard the forum Chillipeppa from across the pond in New Hampshire

1st off, what year is your Automatic?(need to figure out from the wire harness if a K model switch wiring is workable)
Post a picture of your bike.

I don't have an A model to compare and fashion up the modifications but I do have K models and have knowledge about doing handicap mods having worked at a Trike conversion shop in San Diego.
Do you have the capabilities to fashion modifications, IE welding, a shop to work in, tools etc? Or will you have to have someone else do the work?

As Don said using a long clutch cable along with the K model left hand control switch that has the clutch lever perch attached, then fashion up a clutch cable to attach to the rear brake pivot(#9) on your bike might work out. You'd have to attach the clutch cable hook(circled in second picture)from a K model clutch cover to the brake pivot (#6 at the pin #31)so the cable can pull the pivot and brake rod(#6) like the clutch pull action.
With your handicap, can the rear pedal be left in place? Do you have any use of your foot? Or does the pedal need to be removed? Same with the left foot for the shifter?

The shifter, you can fashion up a hand lever up beside the tank like a motorcycle from the early 1900s to the 1940s had.
I'll be following along with the replies.

[Alan F.]

Honda CB160 used a cable operated rear brake, although it was actuated by the right foot pedal.
You might benefit from taking a look at the way the cable anchored to the brake plate and actuator arm. It seems the brake arm activates in the opposite direction in this photo. Hmm.
I'm not saying that these parts will fit, just offering a similar bit of factory engineering from the correct time period.