Front Brakes on GL1500 - Sidecar+Disability - Steve Saunders Goldwing Forums

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post #1 of 28 (permalink) Old 01-07-2019, 03:14 PM Thread Starter
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Question Front Brakes on GL1500 - Sidecar+Disability

Howdy,


(My goldwing (1995 GL1500) has a California sidecar attached).


I have a disability, missing my right leg (above the knee). Which means pressing the brake pedal is not a thing I can do.
I ride two wheelers, and use just the front brakes, but with dual disk up front (and weighing like 700 pounds less) that has always been enough.



Currently the right hand brake is plumbed to the right front caliper and the disc brake on the California sidecar. It is inadequate to stop that monster machine ( 1200-ish pounds before passengers, dog and camping gear). I find that if I apply the front brake And downshift like a madman, engine braking helps ... a lot. But this is not a winning long term strategy. Downshifting quickly is difficult and risky in a panic stop situation. The rear tire is a car tire. So if I downshift hard/fast enough I can actual lock up the rear tire. Yup we slow down quickly, but this is asking to break something. Something expensive.


So: Options ...

Activate the brake pedal master cylinder with left foot.

I am not a master fabricator. Most of my **** works for a while, but out in the wild, under harsh conditions ... not so much ...

Fabricating a foot pedal on the left side to activate the rear brake caliper, that can withstand the abuse of stopping and especially in a panic stop ... my **** would probably break (A man has got to know his limitations (Dirty Harry )). So before I pay sparky $75 / hour to fabricate me a pedal ...



This I could do:

If I plumb the right hand brake lever to activate both front wheel calipers will that be better? (No anti lock brakes on this old girl) It is a sidecar, so if I lock up the front wheel, it is not a fatal event ... just a flat spot on the tire. My cunning plan is to swap the sidecar brake and the left front caliper master cylinder sources. So hand brake activates both front calipers, and the foot brake activates both the rear tire and the sidecar brake. If ever I manage to create a pedal with which I can activate the rear master cylinder, I will gain the stopping power of those two other tires, but in the meanwhile, I get the full stopping power of the front tire.



I know the bike (Sidecar) will tend to want to veer left on braking. This can be compensated with brute force input by the pilot into the handlebars. I have the upper body strength to manage that. I have had other sidecars with no sidecar brake, so previous experience is my proof for that premise ...


Finally we get to the question:

Is the front brake Master cylinder up to the task ? Or will I have to pump the brake ? ( Pumping the front brake seems like the wrong approach, especially in a panic situation ) I understand pressure is equal regardless of the size of master cylinder size.

The question is 'Will Stock Master cylinder to move enough fluid to drive two calipers (slave cylinders) with one squeeze ?

Or do I need to move to a larger master cylinder that is made to move enough fluid to drive two slave cylinders ?



I love my Goldwing, with a sidecar and I want to be safe. I would be grateful for any thoughts /comments / suggestions ?



Thanks !
John

John
1995 GL1500 SE
2002 Honda VF750c
2014 Honda CTX 700
2015 Ural Sidecar - Gear up Forest Camo
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post #2 of 28 (permalink) Old 01-07-2019, 03:34 PM
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There is a special hand brake that has two levers for it, allows Front, and Rear brake controls...


I will try to find it..........


found it


https://www.disabledmotorcyclerider.com/klever.html



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post #3 of 28 (permalink) Old 01-07-2019, 03:51 PM
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post #4 of 28 (permalink) Old 01-07-2019, 03:57 PM
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You might get away with plumbing both front brakes to the front MC if you used braided lines but normally I doubt the original MC would do it with rubber lines, maybe not even with braided lines. The MC John provided a link to would be the best solution. Even with it you would probably want to unlink the brakes & make the front and rear/sidecar separate.

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post #5 of 28 (permalink) Old 01-07-2019, 04:07 PM
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Its an idea that's way over my capability, but, , , use Stainless steel brake lines for the front brake and insert a "T" to "link" the front brakes. I'm uncertain whether that front master cylinder will handle it but the "experts" should have an answer.


I'd consider SS brake lines to the rear caliper, and "link" it to the sidecar disc brake. The pedal for the rear brakes could be activated under the left "heel", similar to the set-up for a "heel-toe" shifter configuration. I would think that master cylinder can deal with both brakes here.



I'm sure others will have better ideas, , ,i'm just thinking out loud here
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post #6 of 28 (permalink) Old 01-07-2019, 04:07 PM
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Claude at freedomsidecars.com might be able to advise you on this.

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post #7 of 28 (permalink) Old 01-07-2019, 04:12 PM Thread Starter
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"There is a special hand brake that has two levers for it, allows Front, and Rear brake controls...
I will try to find it..........
found it
https://www.disabledmotorcyclerider.com/klever.html
"



Thank you for looking that up ... I have looked into that and it is really expensive North of $2000 !
Hoping for a cheaper solution

John
1995 GL1500 SE
2002 Honda VF750c
2014 Honda CTX 700
2015 Ural Sidecar - Gear up Forest Camo
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post #8 of 28 (permalink) Old 01-07-2019, 04:24 PM Thread Starter
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Quote:
Originally Posted by DBohrer View Post
Is the front brake Master cylinder up to the task ? Or will I have to pump the brake ? ( Pumping the front brake seems like the wrong approach, especially in a panic situation ) I understand pressure is equal regardless of the size of master cylinder size.

The question is 'Will Stock Master cylinder to move enough fluid to drive two calipers (slave cylinders) with one squeeze ?

Or do I need to move to a larger master cylinder that is made to move enough fluid to drive two slave cylinders ?


There are GL1500 Trikes that have been converted for the right front brake lever (master cylinder) to apply both front brake calipers.

The GL1000 Gold Wing's (while not quite as heavy as your rig) were designed for the front brake lever (master cylinder) to apply both front brake calipers.

Your front brake master cylinder should handle applying both front calipers with no significant issues....!

Well of course ! This issue must have already been solved by the trike engineers. Thanks, that is a great place to carry on the search ... Sometimes it is just knowing where to start looking to find the answer ...

Cheers,
John

John
1995 GL1500 SE
2002 Honda VF750c
2014 Honda CTX 700
2015 Ural Sidecar - Gear up Forest Camo
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post #9 of 28 (permalink) Old 01-07-2019, 04:36 PM
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One other idea might be to consider increasing the effectiveness of the rear brake by increasing disc diameter. A larger disc will increase the stopping power significantly. The only drawback might be that brake pad wear will increase as well. Also you might have to be careful that too much braking on the sidecar might make the bike pull to the right during hard braking. A brake proportioning valve between the bike and sidecar could fix that issue though.

Mike

Worked on the "big rigs" for 45 years now just riding my Wing whenever I can. Gets cold in Wisconsin.
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post #10 of 28 (permalink) Old 01-07-2019, 08:01 PM
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Quote:
Originally Posted by DBohrer View Post

The GL1000 Gold Wing's (while not quite as heavy as your rig) were designed for the front brake lever (master cylinder) to apply both front brake calipers.
!
So do the 80-82 1100s but the master cylinder has a bigger bore than the ones with linked brakes. I worked on a 1500 side car rig that had both front brakes on the front MC but it had been bored out to 5/8".
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