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Discussion in 'Thumpers' started by Sock Monkey, Apr 7, 2008.
physics would say bigger rotor = more stopping power given everything else being equal
yes, I am with you on that....somewhat. But, the bigger rotor on the X vs the R is more for, less brake fade, due to the chances of the X using its front brake more than the R, in its typical riding environment. The calipers and pads, sans mounting location, should be identical, as far as function. If I am correct, surface area of pad, does not care how big the rotor itself is.
Bigger caliper, bigger pad and bigger rotor, would make for "better" braking, IMHO.
I've never had a problem stopping the R. Normally you lose wheel traction before you come to a full stop me have to let off the brake anyways.
WRr's and Tunnels
Don't do it. The TM II front tire sucks. The MT21 front would be way better. I really like the Scorpion Pro of the MT16 fronts.
Sounds like I'm splitting hairs and the R hubs/rotor/brake components laced to SM wheels would be fine.
I did shoot an email to Wheeling Supply.
After I resolve the wheels question it'll be on to the exhaust/ECU/tuning dilemma.
Wish I could do a Jay Leno, ask that the bike be setup and let me know when ready.
I havent investigated the hubs on the stock wheels for the R and the X, but I wouldn't be at all surprised if they are identical.
The front brake calipers are the same, as are the stock pads. The only difference is a larger diameter rotor and a different caliper mounting bracket. The master cylinders appear to the identical (again, in contrast to others like the TE/SMS 630).
Yes, increased leverage results in the X having greater stopping power on the front wheel. In reading thousands of posts on these threads, it is uniformly considered a BAD thing in the dirt. The X brake locks the front wheel too easily for most (aggressive) riders. Also, and more important to some, the larger diameter X rotor places the caliper at increased risk of damage in a slide or crash - it is harder to protect.
The consensus it that the R brake is perfectly adequate, and more than adequate in the dirt. On the street, with X wheels and tires, with more rubber contacting the ground, the R brakes feel weak to some. This appears to be strongly correlated with their past history (street vs. dirt) and their expectations for performance, rather than linked to any real performance inadequacy.
As a counterpoint, several contributors here run knobbie tires on X wheels (I'm thinking of one in particular on a WR250X because he has a short inseam and likes the lower ride height on the X but wants full suspension travel). They have never reported that the X front brake is "too strong" in their dirt riding, but I didn't get the sense that they were aggressive riders.
Makes complete sense. Thank you, kind sir.
Edit for follow-up question: Do the X and R rotors swap out? If I buy used X wheels can I just put an R rotor on them for easy swapping?
I run a full 'r' setup on my 'x' in dirt mode and my wife's dirt setup is with warp9 wheels with the x rotor. For ease I suggest using an r hub for the am setup. Your brakes are sufficient unless you get in a track type situation where fade can come into play.
First of all, mega-thanks to all who posted comments and suggestions about tires - extremely helpful!
So, if I understand this correctly, I can replace my OEM rear sprocket with one that's 3 teeth more without having to either break or get a new chain and the only difference with the 3-tooth-larger rear sprocket will be the rear axle moving forward ~5mm?
I put on a 44, one tooth up, and that was as far as the chain could go.
Loving the WR but need to lower the brake pedal. Google found several options but want to hear from the pros here..
What do you suggest?
Use the factory adjustment on the master?
Yesterday I finally had new tires put on my nighthawk and finished buttoning up the WRX from its winter tear down and was able to ride them back to back for the first time. The Honda is more powerful no doubt, but the difference in town isn't all that great unless I want to get arrested. Of course, I'm barely using the throttle vs wringing the neck of the wr. It's only when I got on the expressway did I remember why I wanted a street bike after all this time...
Is there room in my life for two bikes? I'll find out next week when I take the Honda on a 2000 mile road trip around a
Alaska, because right now after riding both I'm having a hard time seeing why I need both...
If you only need one, which would you keep?
With the WRR I just picked up I'm up to five bikes. I'll probably unload the KDX although I'm the type that has trouble getting rid of bikes.
I'll bet once you own both concurrently you will keep the kdx. Two different tools, imo.
Can someone suggest a tire (brand and size) for a Wr250R to take a 2000 mile road trip on (all pavement).
Links are always appreciated
Avon Distanzias are a great tire. Reagular dualsport road tire. They handle street very well and dirt too if you decide to take a dirt road or two...
I'd go with the stock sizes, 120/80-18 rear and 90/90-21 front.