Is this a stock front brake master cylinder for a 2009 ST1300ABS?

Howdy gang,
I'm not the original owner of my ST1300. Here are the photos of the front brake master cylinder:





I looked it up in my Haynes manual and an older Honda factory manual that covers to 2006, and it looks stock to me. I ask because I ordered the replacement levers listed in this thread:

https://www.st-owners.com/forums/sh...justable-Levers-for-ST1300-AMAZING-difference!!

They took just under two weeks to get here and are beautifully finished. The clutch lever fit was perfect. However, the front brake lever I received is the same thickness as the new clutch lever (18.2mm) where the pivot bolt goes through and the front brake lever on my ST1300ABS is 22.5mm thick at the pivot bolt. I emailed the2wheels company and got a prompt email back saying both levers should be 18.2mm thick at the pivot bolt. Then he asked if I changed the master cylinder - I haven't but I guess it's possible the prior owner did. Thougths?

That looks the same as my 2004 brake master cylinder (from memory). I don't know if 2008+ changed the master cylinder--you can verify using online fiche. I'm not in a spot to measure the thickness of my clutch and brake levers at the pivot bolt.

A clue that suggests to me you've the original master cylinder is the white painted-on alignment marks for the banjo fitting--those are put on at the factory. A new master cylinder is unlikely to have that mark.

Looking at the parts fiche, looks like the front master cylinder changed from 45510-MCS-761 to 45510-MCS-305 beginning in 2008. Also, the part numbers for the lever and the holding bolt also changed...

It looks stock to me. The clutch lever and brake lever are very different on the ST1300. The brake lever is roughly 18.5 mm thick at the pivot bushing and the clutch lever is approx 10 mm thick.

Scooter said:

Looking at the parts fiche, looks like the front master cylinder changed from 45510-MCS-761 to 45510-MCS-305 beginning in 2008. Also, the part numbers for the lever and the holding bolt also changed...

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Interesting. Has anyone with a 2008 or later ST1300 ordered the2wheels levers? Or happen to have their ST1300 master cylinders apart to measure???

dduelin said:

It looks stock to me. The clutch lever and brake lever are very different on the ST1300. The brake lever is roughly 18.5 mm thick at the pivot bushing and the clutch lever is approx 10 mm thick.

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What year ST1300 are you measuring? As I mentioned, mine is a 2009 ABS model and my measurements were taken on my levers with a vernier caliper so I'm confident I got the measurements for the levers on my moto correct.

jonz said:

What year ST1300 are you measuring? As I mentioned, mine is a 2009 ABS model and my measurements were taken on my levers with a vernier caliper so I'm confident I got the measurements for the levers on my moto correct.

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I got the clutch measurement wrong. It's approximately the same as the brake lever. 2005 model.

The front brake master cyl changed in 08. The brake lever changed thickness also.