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2021 Benelli Leoncino Trail - 2021 CSC SG400 - 2017 SSR Buccaneer 250i - Several CX project bikes
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That's a Honda V45 or VF700C Magna master cylinder. 1982-1986. Only the Magna had those ridiculous buckhorn bars that required the crazy angle to keep the reservoir level. The V65 was spec'ed for DOT 4 brake fluid, and the smaller bikes specified DOT 3 on the lid. The bore is 5/8", which is suitable for two discs and two two-piston calipers. If you use this on a single-disc front end you will get a firmer lever with less travel, but also less feedback.

The lever itself is aftermarket JC-whitney most likely.

Charles.
 

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2021 Benelli Leoncino Trail - 2021 CSC SG400 - 2017 SSR Buccaneer 250i - Several CX project bikes
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1,771 Posts
In working condition? $50 maybe. But yours has the dreaded sight glass deterioration. The plastic sight glass will eventually become soft and pliable and leak. There are some DIY repairs, but not worth it when an aftermarket master cylinder can be had for $25 or $30. Also yours has rash on it, which makes it even less desierable to collectors. And they made a MILLION Magnas, those parts are all over eBay.

Charles.
 

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Administrator
2021 Benelli Leoncino Trail - 2021 CSC SG400 - 2017 SSR Buccaneer 250i - Several CX project bikes
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1,771 Posts
yep, good luck. I can't give parts away so I just chuck 'em. eBay is no longer worth the hassle unless it's a high dollar item.

Charles.
 
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