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General Category => General Discussion => Topic started by: chrisk on April 08, 2016, 04:06:08 AM

Title: V65 rear master cylinder return pring
Post by: chrisk on April 08, 2016, 04:06:08 AM

I've just fitted a new rear master cylinder to a v65 but the lever isn't returning. I've replaced the bushes on the gear lever shaft so it is a little stiff but not so bad, and I'm sure it will loosen up.
Anyway, I've got a spring as per the pic, but this version of mcyl doesn't have a mount for the centre of the Spring. I seem to remember on an old v50 that the pivot that holds the lever extended by about 10mm on the right side as you look at the pic which is where the centre of the Spring was mounted.

I guess the question is can I get one of longer pins, which also needs to have the circlip ridge....?

(https://lh3.googleusercontent.com/-9-N75oIISfI/Vwdy5Gx31MI/AAAAAAAAAtE/nSEGmsWkCCU-qVconEfqK6kA9g9unovQwCCo/s800-Ic42/image.jpeg)

Title: Re: V65 rear master cylinder return pring
Post by: Chuck in Indiana on April 08, 2016, 06:07:14 AM

Ok, I should have gotten the real camera, but this crappy cell phone pic is taken from the top rear. You can see the hook under the brake arm. The other end of the spring hooks under the MC body. From memory  :rolleyes: the Lario is the same, but I don't want to pull the side cover to make sure.
I thought all these masters were the same, small block, big block, etc. I don't think I've ever seen what you have for a spring/pin combo.
(https://farm2.staticflickr.com/1686/26239262421_eb26d078c6_c.jpg) (https://flic.kr/p/FYF5ye)2016-04-08_06-57-16 (https://flic.kr/p/FYF5ye) by Charles Stottlemyer (https://www.flickr.com/photos/107188298@N06/), on Flickr

Title: Re: V65 rear master cylinder return pring
Post by: chrisk on April 08, 2016, 10:10:07 AM

I think my picture is misleading, I'm holding the spring with my hand, and the thing that looks like it's going through the spring is actually the footrest below. From yours it looks like you do have a longer pin that the centre of the spring wraps around.

Title: Re: V65 rear master cylinder return pring
Post by: Chuck in Indiana on April 08, 2016, 10:24:56 AM

It certainly appears that way. <scratching head> I wonder why?
My precision tools are down in the shop, and I'm not still walking far, so you'll have to put up with a scale measurement.  :smiley: As nearly as I can tell, my pin is 34mm long, and held by an e ring on both ends.