GL1100 Master Cylinder upgrade - Page 2 - Steve Saunders Goldwing Forums

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post #11 of 23 (permalink) Old 09-30-2009, 12:00 AM
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Yup. for me the satinless brake lines are the best bet. I also stick to my beloved EBC organic pads tried and trusted.

The caliper upgrade is one route I have been thinking of too. When I find a pair of twin pots in the bike breakers I will give them a try.

keep the old girl on the road

1980 gl1100 A canadian import. mileage 150,000 +
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post #12 of 23 (permalink) Old 09-30-2009, 12:10 AM
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peterbilt has a point, old wings hoses are the weak point of brakes.. if you change to stainless steel lines brakes will feel totally different. thats probably all you need
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post #13 of 23 (permalink) Old 09-30-2009, 11:37 AM
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I agree. My front brakes were quite mushy - I could squeeze the lever all the way to the grip.

I replaced my brake lines with stainless lines from Vencowings last spring (along with rebuilding the master cylinder and caliper), and the brakes are rock solid, knife-edge sharp now - a thousand times better than they were.

I would recommend going with the stainless lines first, and then decide if you still think they need improving.


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post #14 of 23 (permalink) Old 09-30-2009, 01:37 PM
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Even using a bigger/newer master cylinder with the old hoses you will see no improvement at all.
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post #15 of 23 (permalink) Old 09-30-2009, 02:15 PM
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In point of fact, a master cylinder with a SMALLER bore will give you better braking force as it will increas the hydraulic advantage. Picture it like a kickstand pad. The kick stand has the same amount of weight on it no matter what it's sitting on (force). But if the ground is soft, it may sink in, so you use a pad, or a piece of wood or something. This increases the surface area, thereby reducing the pressure. If you increase the diameter of the plunger, then the force you apply to the brake lever is spread over a larger area and actually decreases the amount of pressure in the brake line for the same amount of force applied to the lever. Randakk's has a very good explanation, as well as an upgraded master cylinder for the GL1000 (don't know if it will fit the GL1100, or if it will be an upgrade for the 1100). But at least the theory I'm trying to convey is explained better on this page:



http://www.randakks.com/Brake%20Parts.htm#1





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post #16 of 23 (permalink) Old 09-30-2009, 03:52 PM
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OK not an engineer, but brave experimenter. Sometimes no other choice. That said I have tried a GL1200 front master cylinder on my 83 Aspy GL1100 and had no problem. No difference in braking or feel. I recently aquired a New in the box gL1500 master with some other parts I bought. Looked it over and thought "why not" so for the last month have been riding my 83 Aspy with The Gl1500 master cylinder. It does have a slightly smaller bore and smaller reservoir. Lever pulls about a quarter inch more than stock one did but real solid. Actually seems to brake a bit better. Of course with the smaller reservoir will have to keep a closer eye on fluid level as pads wear.
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post #17 of 23 (permalink) Old 09-30-2009, 08:27 PM Thread Starter
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Well you have all probably saved me a ton of money going in the wrong direction. I'm in touch with Lopeha "Andy" and he's going to set me up with the new brake lines and I'm going to try and just do a 1200 master cylinder, it's all metal housing seems a bit more durable than the plastic one on the 1100. Thanks for the help, this is a great forum.

Jeff

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post #18 of 23 (permalink) Old 09-30-2009, 09:04 PM
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One last note...Several months ago Broke Winger found NEW front master cylinders from this company they come either power coated or chrome ......Any one needing a new front master cylinder might check these guys out.....

http://cgi.ebay.com/ebaymotors/FRONT...d=p3911.c0.m14

Just a thought...Broke really liked his and when he complained that the lever had a defect ..They sent him another one and told him keep the defective one......


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post #19 of 23 (permalink) Old 10-01-2009, 12:55 AM
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just remember, 1500 and 1200 front master cylinders are mean to work with a single caliper (rear brake operates one of the front), 1100 front brakes are dual caliper.
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post #20 of 23 (permalink) Old 10-01-2009, 02:21 AM
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William,early 1100's were dual on the front but late 1100's were linked front and back and front master cylinder just worked a single caliper. on my 83 Aspy it only works the front left caliper
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