Author Topic: Nissin Front Master - is this a 5/8th?  (Read 1395 times)

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Offline SKTP

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Nissin Front Master - is this a 5/8th?
« on: June 21, 2017, 12:09:18 pm »
I want to buy this Nissin front master.

https://japan.webike.net/products/21554410.html

I am a little confused about this:

Quote
Piston Diameter: Length Type Φ19(3/4-inches)[*Width Type 5/8-inches Correspondence]

and

Quote
● φ 19 is Horizontal Type 5 / 8 Inch, φ 17 is compatible with Horizontal Type 14 mm. (* Can not be used for other Size. )

Is this a 5/8th piston? What is "φ" that symbol?

Where else can I buy Nissin products?
1978k rebuild thread http://forums.sohc4.net/index.php?topic=68423.0
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Offline SKTP

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1978k rebuild thread http://forums.sohc4.net/index.php?topic=68423.0
BIKE OF THE MONTH - OCTOBER 2017
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Offline Bankerdanny

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Re: Nissin Front Master - is this a 5/8th?
« Reply #2 on: June 21, 2017, 12:41:04 pm »
I believe that what it is saying is that the cylindrical piston has a diameter (bore) of 5/8 or 14mm and a length of 3/4 (19mm). The bore is the important number so that should work fine for a single front disk SOHC/4.

I think the symbol is a lowercase Greek phi. In math it sometimes signifies the golden ratio (~1.618:1), but I'm not sure how it fits in to this situation.
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Offline 754

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Re: Nissin Front Master - is this a 5/8th?
« Reply #3 on: June 21, 2017, 12:51:32 pm »
14 mm is 9/16.. 5/8 is 16 mm.
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Offline SKTP

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Re: Nissin Front Master - is this a 5/8th?
« Reply #4 on: June 21, 2017, 12:52:18 pm »
I need 5/8th for my dual stock front brakes. I love the gold body but do not want to risk the wrong piston. Looks like silver it is.

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« Last Edit: June 22, 2017, 11:48:32 am by SKTP »
1978k rebuild thread http://forums.sohc4.net/index.php?topic=68423.0
BIKE OF THE MONTH - OCTOBER 2017
2003 Ducati M800ie
1997 Honda CR-V
2004 Honda CR-V
1966 Honda S90

Offline SKTP

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Re: Nissin Front Master - is this a 5/8th?
« Reply #5 on: June 23, 2017, 03:42:01 pm »
Well after researching a bunch and learning the difference between radial and axial...I finally order the Dime City one...if I had gone radial, I would have needed a different brake line due to the banjo fitting I have and the position of the bajo-bolt on the radial master. I figure the non-radial Nissin will be a noticeable improvement and probably the "feel" of radial would have been wasted on my super old calipers anyways. I had a friend in Japan look into Webike and he figures they are legit. Their Nissin radial master is price almost too good to be believed...unless shipping gets you or something?...anyway, can't wait to try the new 5/8th!
« Last Edit: June 23, 2017, 04:43:39 pm by SKTP »
1978k rebuild thread http://forums.sohc4.net/index.php?topic=68423.0
BIKE OF THE MONTH - OCTOBER 2017
2003 Ducati M800ie
1997 Honda CR-V
2004 Honda CR-V
1966 Honda S90