| Author | Message | ||
     Two_buells |
OK, I thought it was me, This being my first bike with a Hydraulic Clutch. Now I'm a seasoned rider, 22 bikes since I was 12 years old. My slow riding abilities are well honed. Clutch and Throttle control are very good also. So here is my story, I picked up my 1125R on Fri of last week and I was trying to get used to the hydraulic clutch. It seems like the rpms are jumping around when I start out. Ok, so there is a little play in the throttle and I’m not used to the clutch. I stalled the bike a few times. I took up some of the play in the throttle and on the way home from work today I was at stop light and with a closed throttle I let out the clutch a little and pulled it back it. The RPM’s jumped from idle to 2500. I can make the RPM’s jump from idle to 2500 with just letting the clutch out pulling it back in. Anyone else notice this? | ||
| Jdugger |
I think it's actually a fuel injection issue. If you don't give the bike gas but feather the clutch out, it will give itself gas to keep the idle steady. I've noticed it on my bike, and the first few times it really takes you by surprise because the bike sort of takes off in the parking lot in a way you did not expect. Mine either doesn't do it anymore or I don't notice it now... | ||
| Ratbuell |
Yes, the EFI is tuned to bump revs for you. If you notice in ODIS, if you are reading active data from diagnostic mode, there is a "clutch state" readout showing either a 0 or 1. In or out. The engine pays attention and tries to help  I agree, hydraulic clutches are funky to get used to. There's little to no tactile "friction point" like on a cable clutch...but after a few stoplights I usually stop stalling them. lol. | ||
| Two_buells |
cool, thanks, I thought I was nuts.... | ||
| Ratbuell |
Nope, not nuts...at least not in this instance  | ||
| Clutchless |
Does the slipper clutch have the same effect for downshifting too? I've read only a little about it, and heard that it "sorts out the back tire" when you down shift hard and start to loose traction in turns. like that electronic stuff they use in motogp to give it a little bump in revs when the bike wants to high side or something. | ||
| Dtx |
Kinda have a similiar question...I have never ridden an 1125R until this weekend when I bought it. When the bike is idling in neatral I hear a clicking sound coming from the bike. Then, when I pull the clutch in it goes away. Does something need to be adjusted or is this the nature of the Beast? Also, when checking the oil I have experimented and noticed the reading is VERY sensitive to the levelness of the bike. If its held perfectly upright, you get a accurate reading. However, if it is just slightly leaned over (I usually rest my kickstand on a 2x4) it is enough that oil will not even be on the dipstick. Its kinda fun learning the ins and outs of this bike. What an awesome ride! | ||
| Dentguy |
Two_buells, Idle control valve similar to a car should be the cause. The clutch switch should be to prevent you from starting in gear not to control idle. The only thing it has to do with your clutch is that you are letting it out in gear and loading the engine. The computer then raises the idle to try and keep it from stalling so when you quickly pull the clutch back in the idle shoots up until it can compensate again for no load. Modern cars have this setup so when you turn on AC or lights etc. your computer will raise the idle to compensate for the load to keep idle consistent. Like Jdugger said. I think that will only happen in a closed throttle position. (Message edited by dentguy on March 11, 2008) | ||
| Dre99gsx |
Same thing on my 1125r. It was more apparant in cold weather / long drive. As I started hitting traffic, I noticed I could just clutch it all the way form stop/slow moving without touching the gas. | ||
| Ratbuell |
A little idle chatter is normal on these things, I wouldn't sweat it. The slipper clutch...well, it slips the clutch on downshifts. Imagine it this way - if you knock a downshift on an XB or a Tuber or any other "street" bike, and let the clutch out quickly, the rear tire will lock momentarily until the tire-to-pavement friction speeds the tire up and brings the engine revs up. The "fix" is to blip the throttle on a downshift and let the clutch out slowly, and you get a smooth transition to the lower gear. The slipper clutch reads engine vacuum - there is a diaphragm that, when in vacuum (i.e. no throttle opening), will activate and pull the clutch plates slightly apart, like pulling the lever in, say, 1/8 of the way (just a ferinstance, don't quote me on the number). That way you can downshift and drop the clutch lever, and the clutches will slip just enough to keep the tire from chirping against the pavement. In class at Pocono we were coming off the back straight around 130-140 on the 1125r. The straight dumped into a 40mph left. I got in the habit (the BAD habit) of slowing in this order: pull clutch lever in; scrub speed with the front brake until the entry point; knock 2 quick downshifts and dump the clutch as I rolled off the front brake and dropped into the turn. Any other bike would be all over the track, then toss me into the weeds on the outside of the turn after I blew the entry. The 1125 just took it in stride, and I never missed my entry or my apex. | ||
| Jdugger |
> When the bike is idling in neatral I hear > a clicking sound coming from the bike. > Then, when I pull the clutch in it goes > away. Does something need to be adjusted > or is this the nature of the Beast? That's the clutch you hear. If you want to hear a really obvious example, go find a Ducati with a dry racing clutch. They are pretty common. Sounds like a roll of quarters loose in a clothes dryer! I find the noisy clutch rather... well, cool. The fact that you can hear the clutch, even though it's wet, almost gives the 1125r credibility among the Ducatsi. That Rotax motor and transmission sure make a lot of clatter, but what a great piece of engineering. The clutch and in particular the shifting of the 1125r are simply amazing to ride. | ||
| Dentguy |
"Then, when I pull the clutch in it goes away." The Ducati dry clutch rattles when the clutch is pulled in and the plates are loose (slipping). Very cool sound, but the opposite of what you are saying. Probably just gear noise (lash) that goes away when you pull the clutch in disengaging some of those gears. A V-twin idle will definitely bring out more trans noise than you may hear in other bikes at idle. | ||
| Clutchless |
thanks for the info Ratbuell! |
