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Re: Gorbees vw trike

Posted: Thu Aug 15, 2019 4:40 pm
by gorbee01279
Sorry my mistake :o it was a 3/8 unf outlet not 3/16 :hide:

Re: Gorbees vw trike

Posted: Thu Aug 15, 2019 5:03 pm
by Skidmark
master cylinder.jpg
this is what mine uses, started with a 5/8" standard then I changed to a 3/4".

Re: Gorbees vw trike

Posted: Thu Aug 15, 2019 5:35 pm
by gorbee01279
Have you still got the hard pedal & weak braking? as i thought you had the same problem as me if that is so i can't get my head around you going bigger on the master cylinder, principle dictates smaller bore more pressure at slaves equals better brakes.....

Re: Gorbees vw trike

Posted: Thu Aug 15, 2019 5:53 pm
by Skidmark
yes hard pedal and weak brakes, when checked on the brake tester for MOT both even and over 130kgf on the gauge, started with standard rear 19mm brake cylinders and 5/8" master, changed to 22mm cylinders which are beetle front cylinders, had problems with this and later found drawing air around pipe fitting to cylinder, changed master to 3/4" but then had to change back to the 19mm rear cylinders, got p*ssed off by this point and have left the 3/4" master on until winter, brakes work but you have to stand on the pedal.
I dont think Harley do a 1/2" master cylinder so would have to change a fair bit.
IMG_1218.JPG

Re: Gorbees vw trike

Posted: Thu Aug 15, 2019 5:58 pm
by Deep Diver
Get one of the half inch ones and have it polished.

Re: Gorbees vw trike

Posted: Thu Aug 15, 2019 6:07 pm
by gorbee01279
it may be worth your while to change to a 0.5 bore i know it would be a bit of work for you to alter what you've got but by doing so you will not need a servo for your dodgy knee as mine now feels as though it's servo assisted.Just to ratify that my setup has worked great & you would really only need to make a bracket to fit onto your existing plate & change your flex pipe to a hard line.

Re: Gorbees vw trike

Posted: Fri Aug 16, 2019 10:19 am
by Kawazuki
I think you were possibly going the right way with the 22mm slave cylinders ie. same effect as using a smaller dia. master. Pedal ratio looks to be between 7 and 8:1 so ok there. Not sure a 1/2" master will move enough fluid when combined with 19mm / 3/4" slave cylinders or you get to have a long pedal?

Re above post - what difference would hard line make?

Re: Gorbees vw trike

Posted: Fri Aug 16, 2019 11:02 am
by gorbee01279
Kawazuki wrote:
Fri Aug 16, 2019 10:19 am
I think you were possibly going the right way with the 22mm slave cylinders ie. same effect as using a smaller dia. master. Pedal ratio looks to be between 7 and 8:1 so ok there. Not sure a 1/2" master will move enough fluid when combined with 19mm / 3/4" slave cylinders or you get to have a long pedal?

Re above post - what difference would hard line make?
None,it's just my preference i don't like using banjo fittings on master cylinders that are designed for hardlines as regards to moving enough fluid mine works fine with 19mm slaves as the cylinder i used,as pictured has 1 1/2 inch stroke & works good now.

Re: Gorbees vw trike

Posted: Fri Aug 16, 2019 1:07 pm
by Skidmark
gorbee01279 wrote:
Fri Aug 16, 2019 11:02 am
Kawazuki wrote:
Fri Aug 16, 2019 10:19 am
I think you were possibly going the right way with the 22mm slave cylinders ie. same effect as using a smaller dia. master. Pedal ratio looks to be between 7 and 8:1 so ok there. Not sure a 1/2" master will move enough fluid when combined with 19mm / 3/4" slave cylinders or you get to have a long pedal?

Re above post - what difference would hard line make?
None,it's just my preference i don't like using banjo fittings on master cylinders that are designed for hardlines as regards to moving enough fluid mine works fine with 19mm slaves as the cylinder i used,as pictured has 1 1/2 inch stroke & works good now.
I have fitted a Goodridge brake pipe with banjo fitting as the rear master cylinder is a Harley Davidson one that uses flexible pipe and is designed for banjo fitting, it also has my brake light switch incorporated, and I agree I will be going back to 22mm slaves with 5/8" master over winter

Re: Gorbees vw trike

Posted: Fri Sep 13, 2019 12:46 pm
by gorbee01279
What about these two Lep? can give U eBay numbers if interested,while i'm at it how do you copy an eBay item onto the forum?