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Lorre79

How to make a front brake less agressive?

22 posts in this topic

But is it normal that a 450F brake is more agressive than from a 250f.

The bike has only 5hours rode, stock pads are still installed

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The stock brake on a newer YZ is good but its not crazy good. I would suggest practicing your braking technique instead of lessening the braking power. Maybe if you had a KTM or something with an over sized rotor it would be a different story but i'd just take it easy and you'll get used to it in no time.

And to answer your other question, I don't know if the stock brake is more aggressive on a 450 but it's quite possible that the brake on the 250F was worn/faded and the brake on the 450 is just fresh. On the 250's I've ridden I can't recall a substantial difference in braking.

Nate

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You did not specify the year models involved, but the front brake was changed on '07 YZ250F's and '08 YZ450's from previous models.

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I first rode a 07 250f and had no problems with the front brake. This bike is a 450f 08( new bike)

With this bike it is nothing or blocked...

If i touch te lever a little bit, the wheel is blocked in less then a second.

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I first rode a 07 250f and had no problems with the front brake. This bike is a 450f 08( new bike)

With this bike it is nothing or blocked...

If i touch te lever a little bit, the wheel is blocked in less then a second.

damn i love my front brake like that, and i really dont no what to tell you besides just get use to it and learn how to use it..

maybe this will help you, you can come in faster into a corner?

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I've had many motorcycles , 3ktm's, 2 yam's..

But this issent just a good brake.

I hassnt got anything to do with good riding,

Example: In a car, if I want to brake a little, all the 4wheels are blocked.. There must be a way to make it proportional to the power applied to the lever.

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I've had many motorcycles , 3ktm's, 2 yam's..

But this issent just a good brake.

I hassnt got anything to do with good riding,

Example: In a car, if I want to brake a little, all the 4wheels are blocked.. There must be a way to make it proportional to the power applied to the lever.

I have an oversize 270mm BRAKING wave rotor on my bike and it has incredible feel. You could give on of those a try one of my favorite mods.

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Wow...i put on an oversized rotor??? I wish mine was that easy. Just use 1 finger. less power to pull that way....

It took everything I had to not be a smart a$$ in that answer

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Wow...i put on an oversized rotor??? I wish mine was that easy. Just use 1 finger. less power to pull that way....

It took everything I had to not be a smart a$$ in that answer

Have you ever tried one?? You can be a smartass all you want, but if you haven't tried an oversized front then you have no idea what they are like. It gives you MORE leverage on the front wheel to stop, but not lock up the front wheel. Therefore yes if you in a panic grab a fistful of front brake lever then it will lock up sooner. On the other hand if you know what you are doing with it you can greatly improve your approach into a corner as you have more stopping power.:lol:

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do you blip the throttle on corner entry? getting rid of massive engine braking from a 450 makes life pretty easy on some corners

If you are asking me I do "blip" only if I slowed down too much. Mostly I use the compression to assist in braking. Just different styles thats all.

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Have you ever tried one?? You can be a smartass all you want, but if you haven't tried an oversized front then you have no idea what they are like. It gives you MORE leverage on the front wheel to stop, but not lock up the front wheel. Therefore yes if you in a panic grab a fistful of front brake lever then it will lock up sooner. On the other hand if you know what you are doing with it you can greatly improve your approach into a corner as you have more stopping power.:lol:

Finch.....Let me slow this down for you.... I put an oversized rotor on my bike. The thread started out with a gentleman that thinks the stock brake is way too aggressive. I am amazed since I HAVE an oversized rotor on my bike. In fact I've had one on my last 4 bikes. You are correct on the increased leverage. :banghead: I was merely making fun that the stock rotor was too much.

you able to follow that time finch???:worthy:

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Finch.....Let me slow this down for you.... I put an oversized rotor on my bike. The thread started out with a gentleman that thinks the stock brake is way too aggressive. I am amazed since I HAVE an oversized rotor on my bike. In fact I've had one on my last 4 bikes. You are correct on the increased leverage. :worthy: I was merely making fun that the stock rotor was too much.

you able to follow that time finch???:lol:

Then quote the guy that made the thread not me! Thanks for clearing that up for me as your original post was scattered and made no sense to me. I need it in plain english! No hard feelings hear.

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I do hope you two are about done with this.

To the original question, I haven't run into a totally stock YZ front brake I thought was too aggressive, and the '07 YZ250F you had is the same setup as on the '08. With that in mind, I think I'd start with a new set of OEM pads on the odd chance yours were contaminated with something at some point in time.

You might also try beveling the edges of the pads back a bit to reduce their contact area.

A more advanced approach would be to alter the hydraulics. If you compare the master cylinder bore diameter of your current M/C with an earlier one, say an '06, you may find yours is a smaller diameter. If you mount one with a larger bore, you will reduce the hydraulic "leverage" somewhat, which should accomplish what you're after.

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Do you notice your leaver does not pull back as far as compared to other bike before it locks up?

I have run into a few brand new 08 250'f with bad master cylinders from the get go, they were either nothing, or full blown braking within a mm of pull. Quite possibly this may be your situation. If the bike is less than a month old, I would bring it by where you bought it and bring up the issue with the dealer.

It almost feels like the brake system is overly pressurized, but no amount of bleeding can fix it.

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Use DOT 5.0 or 5.1 Fluid

That makes no sense and clearly you have no idea what you are talking about.

DOT 5 is silicone based while the others (DOT 3, 4, and 5.1) are glycol based. DO NOT MIX DOT 5 brake fluid with others. It is meant to be used all by itself in certain conditions. If mixed it creates a nasty mix with solids that are not meant to be in a braking system.

The op is not experiencing a situation where he needs to change the brake fluid as it is working too well, not boiling over from too much use and becoming spongy.

Please be certain of what you post because someone might take it for gospel.

:lol:

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