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FJR Motorcycle Forums
Technical & Mechanical Problems
Un-Linking Front Brakes on 2nd Gens (and later)
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<blockquote data-quote="Fred W" data-source="post: 1358406" data-attributes="member: 3828"><p>I agree, that seems to be all that is needed.</p><p></p><p>And actually, you may be able to leave the rear brake line as stock, and leave the proportioning valve in there doing nothing since there will be no unified brake line path anymore, there is nothing to proportion it to. But eliminating the proportioning valve (eventually) would be good for simplicity.</p><p></p><p></p><p>I don't think so. Because of the increased total slave cylinder area the front brake lever may need to move further, but the brake lever <em>effort </em>will be reduced by the increase in area, and the increase in friction area will result in more brake power applied to the front wheel.</p><p></p><p></p><p>I agree, the rear ABS may actuate easier because you will no longer be diverting fluid to the front unified brake circuit. But you'll also have a stronger rear brake for the same reason. It's possible that eliminating the proportioning valve would reduce fluid resistance even more.</p><p></p><p></p><p>Well, not really. Front end dive is proportional to total front braking power and softness of front suspension, but you would naturally use less lever effort to produce the <em>same </em>amount of total front brake power to stop from a given speed in the desired distance. So brake dive shouldn't change.</p><p></p><p>What you might find is that it is easier to set off the front ABS due to the increased available braking power.</p><p></p><p></p><p>That is an unknown and well worth considering. Maybe use a bleeder screw as the plug for the ABS block port?</p></blockquote><p></p>
[QUOTE="Fred W, post: 1358406, member: 3828"] I agree, that seems to be all that is needed. And actually, you may be able to leave the rear brake line as stock, and leave the proportioning valve in there doing nothing since there will be no unified brake line path anymore, there is nothing to proportion it to. But eliminating the proportioning valve (eventually) would be good for simplicity. I don't think so. Because of the increased total slave cylinder area the front brake lever may need to move further, but the brake lever [I]effort [/I]will be reduced by the increase in area, and the increase in friction area will result in more brake power applied to the front wheel. I agree, the rear ABS may actuate easier because you will no longer be diverting fluid to the front unified brake circuit. But you'll also have a stronger rear brake for the same reason. It's possible that eliminating the proportioning valve would reduce fluid resistance even more. Well, not really. Front end dive is proportional to total front braking power and softness of front suspension, but you would naturally use less lever effort to produce the [I]same [/I]amount of total front brake power to stop from a given speed in the desired distance. So brake dive shouldn't change. What you might find is that it is easier to set off the front ABS due to the increased available braking power. That is an unknown and well worth considering. Maybe use a bleeder screw as the plug for the ABS block port? [/QUOTE]
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FJR Motorcycle Forums
Technical & Mechanical Problems
Un-Linking Front Brakes on 2nd Gens (and later)
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