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Showing results for tags 'discbrakelockedup'.
Would Low disc brake fluid, in itself, cause a front disc brake to grab and lock up? I have a 96 DR350 and when I bought it the guy told me that the front brake fluid was low, but I kept forgetting to buy some (Dot-4). I've been riding the bike for almost 2 months and it's been doing great, no complaints. But last time I rode it I did notice that the front brake wasn't as good as it normally was. Well I took it for a ride today and got about a quarter mile down the road at about 35mph and started to notice a slight surging grab on the bike, couldn't figure out why so I slowed down to pull into a driveway and as soon as I hit gravel it locked up and I tucked it and tipped over (I can't remember for sure, but I might have tried to use a little front brake as I pulled in). the front brake lever felt tight and wouldn't pull and the brake stayed locked on the wheel (not totally locked up but mostly) for just a minute or so and the disc felt slightly warm but not hot by any means. after a couple minutes it opened back up and the bike would roll freely. So I rode back home slowly at about 5-10mph, stopping about 4 times and resting a minute or two so it would not get hot, I checked the disc every time I stopped and it barely felt a little warm to the touch but not hot and not even very warm, just slightly warm. The fluid level looks empty through the looking glass and after I got home the bike rolls free and fine. I suspect the low brake fluid caused the brakes to grab because it didn't have enough fluid in the system to keep them open. Does this sound like a reasonable scenario for the brake grabbing and locking up?...Low fluid alone as the culprit? Sounds probable to me I was just looking for input. I didn't know that would happen just because of low fluid, I thought the brakes just wouldn't work if the fluid got too low. But it seems that the fluid not only compress's the brakes but also keeps them open when you let off the lever.. is that correct? I've owned many bikes but have never had any brake problems before with any of them and never even had low fluid in any of them before best I can recall. Will low fluid cause this on it's own? the brake pads are fairly new (2 months old with daily use). I just took the wheel off last week and changed the tire and while the rim was bare I put it on a rim jig and checked the rim for trueness, warping and concentricity as well as checked the disc. Everything checked out fine last week. Low fluid was the only issue I could find with the bike, won't be able to purchase any Dot-4 until tomorrow. I believe it would be sufficient to drain, flush, fill and bleed the brake and it should be fine after that best I can tell. Thanks for any 2nd opinions going on the info I've given.