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'78 750 brake lever adjustable?

  • Thread starter Thread starter ZacharyB
  • Start date Start date
Z

ZacharyB

Guest
After noticing my front-brake-actuated stop light switch would only come on with moderate to heavy braking power, I decided to take the switch apart and clean it. The little copper rails the conduit box slides over were fouled with dirt, as was the little box. I cleaned it up and put it back together, and now the front brake stop light works well. Too well--There is an inch or so of complete slack at the beginning of the lever's travel in which the brake light turns on or off. Slack, as in, the wind itself will actuate the brake light. Then the front brakes work fine.

I want to ask, is there a little spring in the stop light switch I am missing that would maintain the lever at its fully relaxed position? Is the front brake lever adjustable? Or is this the spring in the master cylinder? (Front brakes have been bled with new fluid)

Thank you for any help. The bike is at least home and there were no strandings... Still never charges past 13 V though.
 
You can adjust the position of the switch , so it comes on with the brakes, I prefer slightly brfore as it allows me to make sommone back off by showing them brake lights without applying the brakes.
Just lossen the screws that hold the switch and slide it to adjust the point they come on.
Dink
 
Thanks, I also noticed this in the owner's manual just now ("RTFM"). I am going to take apart the switch again and see how the adjustment works.

Also, is it natural to have that much play in my front brake? Is the spring in the master cylinder possibly so old I have lost tension on the last 1 and a half inches of my lever travel?
 
Here is a graphic I have drawn to illustrate the inadjustability of the switch. Any kind of adjustment range that was present on the box or on the "skid plate" has been long broken/absent! There was a piece of solder on the bottom of the box that broke off when I took it apart a second time, so now I have no front brake light unless I frankenstein something together out of a screw and a really small block of wood to take the place of the broken box!

So, how was this thing adjustable in the beginning?

stoplightswitch.gif
 
The parts to repair it are still available from Suzuki or you can change to
a hydrolic type switch that replaces one of the banjo bolts Available from your local K&L parts dist. Banjo bolt has 1mm thread
 
ZacharyB said:
Here is a graphic I have drawn to illustrate the inadjustability of the switch. Any kind of adjustment range that was present on the box or on the "skid plate" has been long broken/absent! There was a piece of solder on the bottom of the box that broke off when I took it apart a second time, so now I have no front brake light unless I frankenstein something together out of a screw and a really small block of wood to take the place of the broken box!

So, how was this thing adjustable in the beginning?

stoplightswitch.gif
Click to expand...

You can buy this switch aftermarket, I've seen them at my buddy's shop. I think he gets them from MCD, a Canadian distributor. There's gotta be someone in your neck of the woods that can get them.
 
Ok. I can get it for $6 at partsnmoreonline.com when I have the money to pay an accompanying $24 for a master cylinder rebuild kit or $40 for triple tree bearings. In the meantime I fabricated another little box out of wood. A little scotch tape and tin foil later and it works surprisingly well. It wasn't even hard to make.
 
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