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Junkyrddog780
| Posted on Friday, August 14, 2009 - 03:24 pm: |
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Today I was riding my 1125 and when I downshifted the bike stayed at the same rpm when I pulled the clutch in. Also when I let the clutch out the rpms didnt increase and the bike didnt slow down like it always has before. It has always dropped rpms when I pull the clutch in and has slowed the bike when I downshifted and let the clutch out Is my slipper clutch just starting to work? It has never done this before. Also the shifting was suddenly buttery smooth. The bike just turned 1700 miles. (Message edited by junkyrddog780 on August 14, 2009) |
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Ccryder
| Posted on Friday, August 14, 2009 - 03:44 pm: |
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Shane: I don't know about yours but, mine does not work that way. Does the scenario you described always happen? What RPM's/ load/ speed/ throttle opening does this occur? Oh yeah, the tranny on these bikes is very light and smooth. If you think things are light and smooth now, you will get a real pleasant surprise around 4,500-5,000 miles. Neil S. |
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Clbofaz
| Posted on Friday, August 14, 2009 - 03:57 pm: |
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Mines always grabbed the road when downshifting. Unless I'm going too slow for the gear, in which case it's not really being ridden. As far as the tranny, when it was new it was so smooth I couldn't feel it shift half the time. After about 500 miles there's a little bit of a clunk to it. Not as bad as the Firebolt but more so than new. Then again, the slipper clutch was leaking and needed the repair. Hope it goes back to like it was, its nice to shift w/o your riding buddies knowing it too. |
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Badlionsfan
| Posted on Friday, August 14, 2009 - 04:09 pm: |
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The hydraulic fluid leaking from the clutch cover has nothing to do with the slipper action of the clutch. |
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Bott
| Posted on Friday, August 14, 2009 - 04:48 pm: |
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1100 miles, and mine doesn't *seem* to work. Still will very slightly lock the rear if I am kicking down rapidly. *BUT* I gotta admit that I still have the habit of blipping when I backshift,so I guess I seldom really give the slipper a chance to work. Old habits are long learned and longer un-learned. I fargin love this bike! |
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Junkyrddog780
| Posted on Friday, August 14, 2009 - 05:00 pm: |
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It just happened today for the first time. I was shifting at about 4,000rpm, maybe 30 mph, light load. When I get out of work Ill see if it stil shifts that smooth. It had always had a little clunk when shifting before. It hasnt started the infamous clutch weep yet. Hopefully it wont... |
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Chadhargis
| Posted on Friday, August 14, 2009 - 05:21 pm: |
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When I tested the '08 model at Barber, I banged my usual two downshifts coming into turn 5 and rapidly let out the clutch out. The slipper works, but it's more a fail safe than a true ramp style slipper clutch. It's nice to have, but it's not a replacement for proper technique. |
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Carbonbigfoot
| Posted on Friday, August 14, 2009 - 05:49 pm: |
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There's a lot of engine braking with this... It'll wiggle around quite a bit even at street speeds (ahem.) with an aggressive downshift. I find myself matching the revs like on the XB. Feels better that way. R |
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The_italian_job
| Posted on Friday, August 14, 2009 - 06:51 pm: |
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the slipper clutch doesn't work the way you described it... it doesn't interfere with your RPM in down shifting, so I don't see any connection with what happened to you. a SC will basically make your rear wheel not overrun your engine on a down shifting, so it'll slip until your rear wheel will spin at an equal speed of the engine. it'll also help you to de-clutch in case you down shift a gear too many. it's adjustable, so you can decide if it works sooner or later. very useful in sportbike's race and supermotard... |
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Ekruizenga
| Posted on Friday, August 14, 2009 - 08:12 pm: |
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Italian Its adjustable?? hadn't heard that before. In fact I seem to remember someone else saying that there was no adjustment for it. Thanks |
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Edmbueller
| Posted on Friday, August 14, 2009 - 09:18 pm: |
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There is no adjustment on the 1125R clutch. |
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Jdugger
| Posted on Friday, August 14, 2009 - 10:24 pm: |
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The 1125r doesn't really have a slipper clutch. The vacuum generated by the motor's intake in closed throttle situations (engine braking) is used to provide clutch disengagement. It's roughly similar to one ever so slightly pulling in on the clutch lever. The theory is this disengagement pressure will help the rear tire avoid skipping in abrupt downshifts since it's less directly engaged to the motor. In practice, I've never seen it work. You can get a sense of this with this experiment: On a steep downhill grade in a relatively high gear, close the throttle and notice the light lever action required to disengage (pull in the lever) the clutch. Compare that to the lever action when the motor revs are matched to the speed of travel or while the motor is accelerating the bike. I'm a fairly light rider (165), and I can tell you there is absolutely ZERO slipper action to the 1125r clutch. If I downshift abruptly, the wheel skips. PERIOD. There's a reason there's an adjustable slipper clutch for sale in the race catalog. |
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Pizzaboy
| Posted on Saturday, August 15, 2009 - 02:04 am: |
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mine works great! it happens at high rpm on hard downshifts. i get it when im at the track mostly. however jdugger is correct. the 1125 doesnt have a TRUE slipper clutch; its a HVA clutch: hydraulic vacuum actuated, and hes correct on how it technically works. it sure would be fun to have a REAL one like in the race catalog... but not at THAT price! |
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The_italian_job
| Posted on Sunday, August 16, 2009 - 05:07 pm: |
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well, I was talking about a real slipper clutch, I honestly did not know the 1125 wasn't a real SC. my 1098S has the slipper clutch and it's adjustable... |
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Bigblock
| Posted on Sunday, August 16, 2009 - 06:58 pm: |
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for the best "slipper action" the throttle must be closed fully when you let the clutch out on your downshift, as that keeps your vacuum up, giving the most slip. Also seems to me to work best with higher rpm and more aggressive riding. It will skip the tire going into first, though, in my experience. If you have any throttle opening at all on your downshift, and are not using it to match rpm, it will definitely hit harder. In my experience, ymmv, etc. |
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R2s
| Posted on Sunday, August 16, 2009 - 07:28 pm: |
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Its a vacuum actuated back torque limiting clutch. In hard down shifting, it will slip quite a bit but not as much as a true slipper. I still blip to match RPM but you must close the throttle quickly to get the full vacuum to get it to disengage the clutch a little. To answer the question, like carbonbigfoot stated there is still a lot of engine breaking. It shouldn't feel like its just free wheeling. |
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R2s
| Posted on Sunday, August 16, 2009 - 11:42 pm: |
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This is also the best clutchless shifting street bike I have ever owned. You barely have to let off of the throttle to click it up a gear. I'm convinced that the vacuum assisted clutch also helps there. By letting off of the gas your slightly pulling in the clutch with out even touching it. |
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