Brake master cylinder style change? - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 3 (permalink) Old 12-26-2010, 03:59 AM Thread Starter
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Brake master cylinder style change?

Hello. Does anyone know why in the late 80's to early 90's they changed the style of the master cylinder fluid cup from rectangle style(like mine) to the round style? Was it just a different manufacturer....or was there a problem with the original rectangle style. I just noticed this change and decided to ask about it. Thanks.
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post #2 of 3 (permalink) Old 12-26-2010, 08:54 AM
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Not sure that I've read anything here as to the reason. My '89 has the rectangle and doesn't have any problems I'm aware of. Since the master cylinder simply serves as a reservoir, I'm not sure the shape is important. It does take less material to fashion a round container than a rectangular one, so cost may be the reason.

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post #3 of 3 (permalink) Old 12-26-2010, 12:14 PM
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I`m not aware of any functional reason for the change either. My `91 was the first model year with the round MC reservoir.

If you are ever looking for a replacement brake lever, they are different between the two shapes. The lever for the round reservoir is basically flat, but to the best of my knowledge, the older rectangular reservoir`s lever has a kind of dog`s leg bend down 10* or 15* from the perch to line up with the grip.

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Last edited by OlHossCanada; 12-26-2010 at 12:16 PM.
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