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Edited Date/Time
2/10/2018 5:36pm
Finally starting to feel I need a lot more ft brake on my 09 YZ250. Hopefully because I am going faster?
Here are the oversize kits I have found:
Braking W-Flo 270mm rotor
Galfer Tsunami 270mm rotor
MotoStuff 280mm rotor
Moto-Master 270mm Flame rotor
Haven't priced them all out but heard the MotoStuff is pricey due to light weight. Any pros / cons on which one to go with ?
Here are the oversize kits I have found:
Braking W-Flo 270mm rotor
Galfer Tsunami 270mm rotor
MotoStuff 280mm rotor
Moto-Master 270mm Flame rotor
Haven't priced them all out but heard the MotoStuff is pricey due to light weight. Any pros / cons on which one to go with ?
Protaper's kit looks decent as well.
The Shop
Pro taper sucks. There have zero customer support for the rotors. Friend got one for an rm250, it had the wrong number of holes...not just drilled off or something. Pro taper line went right to voice mail, and the one person he did get on the phone said they were just a distributor, and that the part # he had matches the part number they list for an rm250...
Like most Tusk parts, does the job at a very affordable price.
Now I'm having trouble locating the Braking W-Flo 270mm kit which MXA had featured in a build -http://motocrossactionmag.com/news/yamaha-yz250.
The dealers know of the Batfly and some generic 270 mm kit but don't seem to have any info on the W-Flo. Braking appears to be based in Italy with no real USA contacts. I tried the distributor Parts Unlimited and that was a complete waste of time.
Seems like the main differences on these are the lighter ones use an aluminum inner rotor piece attached to a steel outer rotor. Maybe some lighter aluminum hardware as well.
And i might be mistaken but i think i finally also used stock yamaha pads in the end.
The most powerfull brakes in the world may not be your solution.
Moral to my story, replace one part at a time.
I think the steel braid line thing was more important back when Yamaha had to use that under the fork bottom routing until the Honda patent finally ran out. Even though the OEMS don't use steel braid lines they do use a form of Kevlar which is still an improvement over the old days. The MXA article also mentioned that most of the testers preferred the feel of the stock pads.
If you know anyone who road races or supermotos ask them about brakes, to them it's like suspension to us.
Pit Row
As far as fixed vs float - http://www.biketorqueracing.co.uk/btr-tech-station/btr-tech-station-brake-systems/brake-discs/fixed-and-floating-brake-discs
"Fixed and Floating Brake Discs
There are three principal types of motorcycle brake discs: fixed, fully floating & semi floating.
A fixed brake disc is a one piece brake disc. That is, its brake pad contact face and wheel mounting face are all part of the same piece of metal. They are relatively cheap to produce and they perform perfectly well within certain parameters, but if they are subjected to serious heat then they are unable to dilate or expand because they are not floating.
Both fully_floating_brake_discs and semi-floating_brake_discs are constructed in two parts. An aluminium centre part which is fixed to the motorcycle wheel and a stainless rotor part which the brake pads push on.
When the rotor is subjected to serious heat it expands. By allowing it to float separately from the mounting face it is free to expand and shrink again at will without being constrained by its mounting. When this expansion takes place is does so in all directions at once and it will not be constrained. If you prevent this from happening in one direction (by fixing it on its mounting face) it has no choice but to warp, so floating_discs and semi-floating_discs are made in two parts to allow the discs to expand and prevent them from warping. This is mainly a high performance type brake disc.
Bikes of more moderate performance can use fixed brake discs perfectly happily and you will also see that most rear brake discs are fixed. This is because they don’t get used as hard and therefore subjected to as much heat. Even so, most rear brake discs are thicker than front brake discs and this is a compromise because the cooling is not as good as the front discs. They don’t get as hot but don’t cool as well either, so the thicker material helps prevent them from warping."
Sounds good to me.
if i was ever to spend bike money on a rotor kit IRP hands down. same build quality as a motostuff kit but for less $
also, on the 08+ yz250 they went to a smaller master cylinder piston and smaller caliper with smaller pistons.
switch out the 09 front caliper for a older yz/yzf caliper, the pistons are much bigger. the increase in stopping power is crazy even with stock size rotor
i run
skw 270
ss line
08 master
06 caliper
its the working class factory front brake. love it
I was very pleasantly surprised by the overall quality, fit, finish, and durability, so yes, I probably would.
If money was no object and I wanted to build something factory style, would probably go with Motostuff or Braking.
Actually, I have no idea what bike you are on. YZ250?
Post a reply to: Question for YZ250 ... which oversize ft rotor?