G oog le Buell 1125R Forum | Login/out | Topics | Search | Custodians | Register | Edit Profile


Buell Forum » 1125R Superbike Board » Archive through July 21, 2014 » Rear brake light switch adjustment. « Previous Next »

Author Message
Top of pagePrevious messageNext messageBottom of page Link to this message

Brokengq
Posted on Wednesday, July 02, 2014 - 11:08 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I know I know. "Who uses their rear brake?". I do. And I really have to mash the sucker (to the point of locking the brake up) to actually get the brake light to light up. Gets sketchy at night. I searched the service manual and can't find an adjustment procedure. Is it possible? Anyone know how?

Yes I use my front too. After long periods of riding without braking I don't like to use the front hard. I don't focus on keeping the heat in the front pads on long highway stretches, so it gets grabby.
Top of pagePrevious messageNext messageBottom of page Link to this message

Nuts4mc
Posted on Wednesday, July 02, 2014 - 11:27 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

the switch is hydraulically operated ...pressure from the Master Cylinder causes the switch to make contact and complete the circuit...( it looks like a banjo bolt fitting with wires coming out of it)
is the master cylinder seized? is it moving the pistons in the caliper?...corrosion of the MC could have become "loose" and plugged the port that feeds pressure to the switch...
try bleeding the rear brake real good ( bleed out enough old fluid to fill a coffee cup) hope this helps
Top of pagePrevious messageNext messageBottom of page Link to this message

Brokengq
Posted on Wednesday, July 02, 2014 - 11:53 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Thanks Nuts. I haven't actually taken a look at it yet, just tried to read the SM. The caliper and MC operate fine. No play in the brake pedal, smooth braking action all the way through. I didn't know it was hydraulically actuated. I'm willing to bet the fluid oriface is clogged in the switch then. Brake fluid is clean however. Who knows. Maybe some trash got in there.

(Message edited by brokenGQ on July 02, 2014)
Top of pagePrevious messageNext messageBottom of page Link to this message

Nuts4mc
Posted on Thursday, July 03, 2014 - 09:49 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

if you need to replace it ...ebay has some:
( need to check the thread size before you buy)

http://www.ebay.com/itm/Motorcycle-Rear-Set-Hydrau lic-Pressure-Brake-Light-Switch-Banjo-Cable-10x1-2 5mm-/231161566452?pt=Motorcycles_Parts_Accessories &hash=item35d24d94f4&vxp=mtr
« Previous Next »

Add Your Message Here
Post:
Bold text Italics Underline Create a hyperlink Insert a clipart image

Username: Posting Information:
This is a public posting area. Enter your username and password if you have an account. Otherwise, enter your full name as your username and leave the password blank. Your e-mail address is optional.
Password:
E-mail:
Options: Post as "Anonymous" (Valid reason required. Abusers will be exposed. If unsure, ask.)
Enable HTML code in message
Automatically activate URLs in message
Action:

Topics | Last Day | Tree View | Search | User List | Help/Instructions | Rules | Program Credits Administration