Yea, I got sick of searching, and didnt want to spend 15-30 dollars on a piece of plastic, so with a nod from swmbo, I bought a recently rebuilt master cylinder from an 97 hayabusa, and an adjustable lever from a gsxr600.

No major problems, kinda bolted right on, and is waiting to be bled. Pics in a sec!

Heres what was done to my stock master cylinder, which put me off the road for two days ( Haven't not rode my bike since i got it a month ago. PAINFULL!!)

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It was taken out, and thrown behind the bike next to a tree by the time i found it in the morning. I Have OCD when I ride, and everytime I ride I check all major systems.

Heres the replacement...





And, here it is on the bike.





No major issues. The banjo bolt may have been a different size, was alil snug getting in, but it sealed correctly and works no problems, so I'm Happy.

Only possible problem I see is it does not have a Mirror mount on the handlebar mount, which dont effect me, but may some people if they have mirror mounts.

Cost, $70 for the master cylinder and handle.

BTW, my stockers are for sale if anyone desires them!

-Justin

I don't think there's such thing as a 1997 hayabusa, they started making them in 1999.. however I'm glad that worked out for you! 

Uh... Yeah, what he said. Let me know how it ends up working - I'm betting that the busa master cylinder is much bigger than the stocker, which will totally change the front brake feel. In fact, usually the size is printed on the bottom of the M/C. Let me know what it says.

You can make out from the pics the diameter of the bore on the casting.

GS is apparently 1/2". The "Hayabusa" is 5/8".

it says 5/8....you can see it in the pic....
yes it's bigger
glad you are back up and riding

and I offered a GS one for $20 shipped.....
I don't get people some days
I can't find the happy medium between paying people to take stuff and getting something that doesn't make me want to crush/bin stuff when I get low balled from somewhat fair pricing.

now you can sell your mirror mount from your old Master cyl   for crash repair to somebody else

the 9 - 7   probably is 99-07 busa

the "feel" is different with the bigger bore

The feel is much nicer, I put it in the other post. Its more linear, not on-off-ish. Feels really smooth.

Yea, all the parts are going in the for sale section. One of the bolts in the old Master Cylinder for the handlebar mount snapped off at the first small twist, so im assuming when the PO dropped it, it bent or something. Nothing an easyout cant fix.

I didnt even remonber you offered me one for $20, I thought someone offered me the piece of plastic for that...

I may have read it wrong, my eyesight is horrible. My mindset was if im going to pay 15-30 for a piece of plastic, I might as well get an upgrade.

Is that new MC sitting flat/level with ground?

Increasing the MC diameter will give a shorter, firmer lever stop, and would take more grip effort to get the same stopping power. More lever modulation, more effort to stop.

Smaller MC diameter will have longer travel, squishier lever stop, and would take less grip effort to get the same stopping power. Less lever modulation, less effort to stop.

Other factor is the condition of the MC bore/seals and the fluid condition.
Also lever ratios of the brake lever itself... they are probably close to same. Distance from pivot to point of MC contact and distance to grip center.

My guess is that a combination of newer MC and fluid, and more modulation in stopping power, is what you're noticing.

Quote from: noiseguy on June 21, 2011, 06:56:43 AM
Is that new MC sitting flat/level with ground?

Increasing the MC diameter will give a shorter, firmer lever stop, and would take more grip effort to get the same stopping power. More lever modulation, more effort to stop.

Smaller MC diameter will have longer travel, squishier lever stop, and would take less grip effort to get the same stopping power. Less lever modulation, less effort to stop.

Other factor is the condition of the MC bore/seals and the fluid condition.
Also lever ratios of the brake lever itself... they are probably close to same. Distance from pivot to point of MC contact and distance to grip center.

My guess is that a combination of newer MC and fluid, and more modulation in stopping power, is what you're noticing.

I think that explains exactly what im feeling!

I need to press slightly more to stop as hard, but the feel is a lot nicer, and it isnt sloppy. Before it was like a switch, 1/2 inch of play, then STOP. Now, theres only about 1/2 inch of play, but theres feeling for every bit of it. Feels real nice.

No, in that pic, it hadn't been bled yet, nor was it level. The fluid is correct now at the high park, and went through almost a quart of dot 4 to make sure all the old was out. Feels great. Same with the rear.