converting '02 M620 dark to dual front brakes

[Bones]

Hi guys,

I have an '02 620 dark with the single rotor/brake set up on the front. i also have an '04 620 donor bike with the dual front brakes and want to upgrade my '02.

so is this the correct logic?

transfer to the '02:

-front brake lines and master cylinder/coffin
-front wheel with both discs
-either both calipers (or maybe just the new right one)


am I missing anything?
am I right in assuming that the '02 right fork already has the proper mounts to bolt the new caliper right up?

thanks in advance!

-Bones

[Monster Dave]

It should all fit. Although, unless you're having problems braking and/or are just looking for a mod to do, the single disk brake should offer plenty of stopping power.

Good luck! Post up picks as you progress!

[Speeddog]

Just swap the whole thing over as a unit, that way you won't have to bleed 'em.

Not that it's a bad idea to bleed 'em.

[scduc]

Stopping power is definately not an issue. I grabbed toooooo much front on my 00' 750 and ended up in the E.R. with the tail of the bike hitting a car who jumped out infront of me. I first thought the same. Why not get 2 brakes up front, I'll have more braking power. If your going for the look, then yes. But unless you plan on doing endo's, one is plenty.

[Bones]

hmmmmmm. Perhaps I need to do some more test-riding to see if the current brakes are adequate.  I've heard others complaining that the single disc isn't enough.

[Langanobob]

It should all fit. Although, unless you're having problems braking and/or are just looking for a mod to do, the single disk brake should offer plenty of stopping power.

+1.  There was a thread on this same subject somewhere and one conclusion was that the savings in unsprung weight with a single disk is more of a benefit than any perceived increase in braking power by going to dual front brakes.   My thinking is that the dual brakes will only provide a real braking advantage on the track where they will take longer to fade than a single disk setup.  But of course they do look better, which counts.

[Speeddog]

The unsprung weight savings is significant with a single.

Pads wear 2x as fast with a single.

With some good pads, and a flush and bleed of the system, a single front would be good on a 620.

Depends on what you need, braking wise.
If you're a motorcycle courier in San Francisco, duals wouldn't be a bad deal. 

[ducrider45]

The bike rides better with the single disk. 

[Spidey]

If you're a motorcycle courier in San Francisco, a dual sport and wouldn't be a bad deal . 

Fixed.      

Seriously, you *gotta* click that link.   

[Porsche Monkey]

Fixed.      

Seriously, you *gotta* click that link.   

Dude musta got hurt or beat up alot as a kid. 

[Gimpy]

I saw that dipshit on the history channel.  He was attacked by a bear!!  So he has dumped his savings into developing that crazy suit.  It works ... kinda.  when he tried to test it on a real bear.......  the bear was so frightened of some guy in a crazy suit it ran off.   


oh yeah... brakes..... ummmm  I like em'    [moto]

[Spidey]

BTW, did you get the "good" 4-piston brakes with the '04 or the cheaper ones (I don't remember if it was '04 or '05 where the bikes came with both)?  I can't imagine switching to dual brakes and putting on 2 pad, 2 piston calipers.  Seems like a waste.

If you got the good ones and you decide to stick with a single brake, someone with a 620, 695 or s2r will be interested in buying at least part of your set-up.

[the_Journeyman]

My '99 M750 only has a single disc.  It actually grabs with more initial bite AND stops better than my 900SS.

JM