Brake mod questions?

I've been wanting to get rid of the master cylinder buried behind the front forks in my 750 Seca.

Now, can I replace it with any handlebar type MC? I've been reading about people using CB600, and R1 Master Cylinders. Those work, with the new brake hoses going straight to the old stock Seca calipers?

If I found one from a Maxim will that be just as effective, or are these newer ones better to use?

One other question... is it really necessary to grind off the brake handle?
Could I just swap one from the Maxim with the master cylinder attached?

maybe even wire one from the R1? Or is that nightmareish?

Thanks a lot guys... Looking forward to getting this bike on the road!

 

Would this work?

E-Bay

 

Yeah, but you could buy a new one for that price. I'd keep looking around. The angle is very important...

 

A new master cylinder for $40 will be a POS that I wouldn't trust to use on a minibike.

Swapping a MC from a Maxim won't work unless you also intend to use the Maxim bars (due to the MC angle). I think a good bet would be the MC from an FJ1100/1200, or a Vision. The FZ one that you linked would also be a good choice.

The bar angle dosen't have to be exactly the same, just close enough so the fluid level never drops below the return port.

Because of the Seca 750 using a cable operated MC you will need to cut away the lever perch from the switchgear, no matter what MC you end up using.
A double banjo arrangment can be used, but the hoses will need to be made longer than stock. You could also have the distribution block inlet re-tapped for a banjo fitting (It may require an insert). Then you'd only need a short hose from the MC to the distribution block, which would simplify routing and give a firmer lever feel.

Bear in mind that using a master cylinder that does not have a fluid level sensor will cause you to loose the low fluid level warning feature (not a huge deal since you gain a sight glass).

 

I use a fj1200 with 2 SS lines from master directly to calipers works beautiful

 

Two lines are exactly one line cheaper than three lines.

 

Two lines are exactly one line cheaper than three lines.

 

Two lines are only two fittings cheaper than three lines, and about a foot of line more expensive. The total cost is almost a wash.

 

I bought one of these. It was easier- and arguably safer- than rebuilding my old, pitted, scrapped up, bolts broken-off, original. It hasn't given me any problems for 6000 miles. And when it does, I'll buy another.

http://www.ebay.com/itm/Brake-Master-Cy ... 1190270595

I would trust a rebuilt stock over the aforementioned, most definitely. But only if the rebuilt stock is serviceable, like mine wasn't.

 

I ended up getting a new MC for a CBR600... It has dual disc brakes and only weighs (From what I understand?) 100 lbs less.

I ended up getting drag bar as well, but now I need risers. Not sure how high yet? I hope an inch will do??

Man, this project gets deeper, and Deeper and DEEPER!!

All I was going to do was change a stupid head light!

Thanks for the help guys!

 

Just saw your post after I posted my last message lacucaracha...

Man... For that Price, maybe I'll buy that one and sell the one for the CBR600.
At least it stays Yamaha.

 

Again, I'd trust the rebuilt OEM (even though it's Honda) over the Chinese-made for sure.

It isn't actually Yamaha, just a no-name the seller lists for a load of different bikes. It's a 16mm you're looking for.

Bar risers are super easy to find. Some kits come with an assortment of risers to adjust.

 

27x2+22 + 6 bolts or 32x2 + 4 bolts
That's close

 

i have drag bars and a 1 inch riser works mint

 

I think the CBR600 MC I bought is 14MM?!? Is that ok?

What exactly is...

27x2+22 + 6 bolts or 32x2 + 4 bolts ?

Thanks!

 

14mm should be okay, but it will have more pull compared to a 16.

The formula refers to brake line lengths and banjo bolts. Plug in the prices and you have your answer.

 

there is another way, run one line to a wheel then double banjo bolt and go up over the fender and down to the other wheel. it might give you a cleaner look on the bars, rather than two lines on the master

 

They're debating the cost/supplies needed for three lines versus two lines.

Two 27 inch lines and one 22 inch line and 6 bolts
vs
Two 32 inch lines and 4 bolts.