Cold Desert Rat Posted November 3, 2023 Share Posted November 3, 2023 The exterior dimensions are identical. The bolt circle, body diameters and steps, bores, etc. The Aprilia part only uses one port. One would need a banjo bolt with a bleeder on it. I find that acceptable There are some other differences. 2 Link to comment Share on other sites More sharing options...
Cold Desert Rat Posted November 3, 2023 Author Share Posted November 3, 2023 I only dimensioned the differences Oddly the cylinder off my bike had no spring It fits like it should on the trans. 1 Link to comment Share on other sites More sharing options...
Cold Desert Rat Posted November 3, 2023 Author Share Posted November 3, 2023 A drawing showing how much travel. I assume the bottom of the piston never comes past the bottom seal. 2 Link to comment Share on other sites More sharing options...
Cold Desert Rat Posted November 3, 2023 Author Share Posted November 3, 2023 A company called Oberon makes a billet version, lifetime warranty, p/n CLU-2800 The smart guys on here will determine if the stock pushrod will work. I have to make a new one anyway, so it's irrelevant to me. We knew somebody else had to use that cylinder 1 1 Link to comment Share on other sites More sharing options...
docc Posted November 3, 2023 Share Posted November 3, 2023 Welldone, @Cold Desert Rat! One for the Encyclopedia of Compatible Parts ? Source/ typical pricing? Link to comment Share on other sites More sharing options...
Cold Desert Rat Posted November 3, 2023 Author Share Posted November 3, 2023 Hey DOCC, I like the Oberon. Lifetime warranty, super fancy seal design and many shiny colors. About $150USD As I recall AF1 wanted $25 for a new Aprilia cylinder but said it would take four months to get I would be honored to have my contribution added to our august assembly. Truly, I am humbled 5 1 Link to comment Share on other sites More sharing options...
audiomick Posted November 3, 2023 Share Posted November 3, 2023 Well done, that man. Please let us know what you find out about the pushrod.You know, longer, shorter, whatever... 1 Link to comment Share on other sites More sharing options...
Lucky Phil Posted November 4, 2023 Share Posted November 4, 2023 6 hours ago, Cold Desert Rat said: Hey DOCC, I like the Oberon. Lifetime warranty, super fancy seal design and many shiny colors. About $150USD As I recall AF1 wanted $25 for a new Aprilia cylinder but said it would take four months to get I would be honored to have my contribution added to our august assembly. Truly, I am humbled Thats about 20% what the rest of the world want for them. I think AF1's pricing might be a little suspect. Phil 1 Link to comment Share on other sites More sharing options...
Cold Desert Rat Posted November 4, 2023 Author Share Posted November 4, 2023 Does anyone know or have a reference as to how far the clutch rod has to move to disengage the pressure plate? Different for single or twin disc clutch? Link to comment Share on other sites More sharing options...
Cold Desert Rat Posted November 4, 2023 Author Share Posted November 4, 2023 I'm not a hydraulic engineer and don't want to be one. So I ask hoping and expecting correction. Regardless of possible range of motion of the slave cylinder, it's the volume displaced by the master cylinder that determines how far it moves. In other words it can't move further than the master cylinder can push. Do I have that right? thx Link to comment Share on other sites More sharing options...
gstallons Posted November 4, 2023 Share Posted November 4, 2023 The volume of fluid "pushed" by the master cylinder has to go somewhere , so it goes into the slave cylinder . Leverage works in this system but it has nothing to do with the volume of fluid moved. Link to comment Share on other sites More sharing options...
Lucky Phil Posted November 4, 2023 Share Posted November 4, 2023 9 hours ago, gstallons said: The volume of fluid "pushed" by the master cylinder has to go somewhere , so it goes into the slave cylinder . Leverage works in this system but it has nothing to do with the volume of fluid moved. Not quite right. The ratio area of the master to the slave cylinder determines the force that can be applied (and the lever ratio as well but we'll leave that) and the "travel" of the master and therefore the volume of fluid displaced determines the travel of the slave. Phil 1 Link to comment Share on other sites More sharing options...
gstallons Posted November 5, 2023 Share Posted November 5, 2023 10cc of fluid leaving the master cylinder will be 10cc of fluid added to the volume of the slave cylinder. Now as far as the leverage portion goes it depends upon the size of the slave cylinder vis-a-vis master cylinder bores. The hydraulic jack proves this point. Link to comment Share on other sites More sharing options...
Cold Desert Rat Posted November 6, 2023 Author Share Posted November 6, 2023 Here's another dumb question while I am at it. Which is the #1 cylinder and why? Link to comment Share on other sites More sharing options...
audiomick Posted November 6, 2023 Share Posted November 6, 2023 What do you mean by #1 cylinder? 1 Link to comment Share on other sites More sharing options...
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