Not sure how to explain it, but sometimes not not very often, when I pull away from a stop, I hear this dragging noise kinda like the front brake is dragging. I have to give extra gas to get going / or kinda like the drag noise from the clutch. The bike is an 08' S2R 1K with 6500 miles. it has not yet gone to the 7500mile first service. I am kinda nervous that it may be belt related. But thought pattern says belts stretch. That is the noise that she make kinda like a belt that is toooo tight or something is dry. Are the stock brakes garbage? If so, what should I be looking for as far as replacement? Does any one think it may just be time to replace the brake fluid? I do feel pulses when using front brake which is the only brake that I use.
When you roll to a stop [sans brakes] does the bike lurch to a stop? If it does, I'd think that the brakes are tight. If it doesn't, I wouldn't consider the brakes a problem. That doesn't mean that you won't hear the drag noise from them either.
I hope this helps,
Later...
Brewster...
What do you mean "the brakes are tight"? I have not really putzed with them so I am not sure if there is any adjustment? The pulsing sensation is as if the rotors ar wrapped. Maybe like the lurching that you are refering to. How to fix?
Belt stretch is extremely unlikely, how about clutch slip?, if you give it a handful from low revs, does the motor suddenly rev and the bike not seem to accelerate?
If you can easily push the bike around in neutral and apply the front and rear brakes and it all behaves then the brakes are fine. Find a hill, roll down in neutral and apply both brakes plenty of times, see what happens
As for not using the rear brake, it's there for a reason, how do you emergency brake?stop in the wet? slow down if you've overcooked it in a corner?
I do use the rear, but only approx. 20% of the time. Usually engine brake and front with slight rear. When I give her from low revs, it seems to be fine. I don't pull the front off the ground. Not ready for that. When I do give her from low revs, she does throw me back, so my first thought is the clutch is fine. I guess first / easiest step would be to bleed both clutch and brake, then maybe pull the brake pads and inspect. What would cause the brakes to drag / not release?
Do you have a front stand? If so, put up the bike and give the wheel a spin. If it stops abruptly, you've got problems. If not, then you're probably fine.
If you've got a build up of crud between the pads and the calipers that will stop them releasing fully, but it would have to be pretty solid crap in there to do that.(stones maybe) Pull out the pads and clean it out (DON'T squeeze the brake levers to get the pistons to move). Damage or rust to the caliper pistons will cause brake drag too. So have a good look after you've cleaned those calipers.
Sounds like clutch slippage to me. You have a wet clutch with fairly low miles but it is still possible that it is going out. Did you learn to ride or use a clutch on this bike? That will increase the speed with which it would have worn out.
Quote from: brimo on August 06, 2009, 04:00:57 PM
As for not using the rear brake, it's there for a reason, how do you emergency brake?stop in the wet? slow down if you've overcooked it in a corner?
I very, very seldom use the rear brake, except maybe to slide the bike and turn it around in the dirt. Been doing that for a long time.
Are you sure its the brakes? Do you have a 14 tooth front sprocket? I'm not sure on the single sided swing arm bikes, but on my 620 after installing the 14 tooth the chain would rub on the guide on the top of the swingarm at times. This would produce a draging noise and was most common during accelleration. May be worth checking out.
Quote from: needtorque on August 06, 2009, 06:55:00 PM
Sounds like clutch slippage to me. You have a wet clutch with fairly low miles but it is still possible that it is going out. Did you learn to ride or use a clutch on this bike? That will increase the speed with which it would have worn out.
He's got a 1K - so it's a dry clutch. And right now I'm leaning towards brake issues, over the clutch. But, it'd be easy enough to inspect the plates and you probably should.
Over all I'm with Erik, that you should get it up on a stand and inspect the front brakes and clean them out. Some other stuff to check is the pad guide pins. They need to be cleaned now and then. They get a build up of crap that can hinder free movement of the pads, resulting in dragging. I had a rear pad hang up one time, badly, and it thrashed my rotor and resulted in my brake line exploding.
Hearing some noise from the pads skimming the rotors is pretty normal when coming off a stop. Remember, there's no mechanism to retract the caliper pistons build in. It's not like the clutch where there are springs pushing back. When you release the brake lever you simply remove the pressure from the system, the pads don't 'jump' off the rotors. If your rotors are warped, the noise will be more pronounced as the high side skims the pad and pushes on it.
Abd going back to the original post - the Stock brakes on a 1k are pretty good. As long as they are in proper condition, no one would call them garbage. There is 'better' but it's not like the brakes on a 620/695/S2R 800 which need a little help.
My 1k did something similar, try blowing out the clutch pack with some compressed air.
Especially if you've got the stock cover on it.
Pulses when using front brake = warped disc. Very common with the stock duc discs.
Quote from: yuu on August 07, 2009, 06:21:11 AM
He's got a 1K - so it's a dry clutch. And right now I'm leaning towards brake issues, over the clutch. But, it'd be easy enough to inspect the plates and you probably should.
God I'm getting old. Second misread post in 2 days.
Quote from: trouble on August 08, 2009, 07:30:55 PM
My 1k did something similar, try blowing out the clutch pack with some compressed air.
Especially if you've got the stock cover on it.
Just wear a respirator when doing this.
Quote from: brimo on August 06, 2009, 04:00:57 PM
...As for not using the rear brake, it's there for a reason, how do you emergency brake?stop in the wet? slow down if you've overcooked it in a corner?
Not for nothing, using the rear brakes in ALL of these situations even the slightest bit too much is the EASIEST WAY TO HIGHSIDE/WIPEOUT!!! If you use your rear brake in these situations be very, very, very careful not to lock it up. If you do lock it up, HOLD IT!!! Even if you're in a turn, you've already made a major mistake and its safer to side it out behind the bike than to be sliding down the road with the bike behind you. Going fairly straight, the rear will stay behind you, unlike a car which will swap ends if the rear locks up. This is because a bike is an articulated vehicle and a car is not.
Anyway, BE CAREFUL WITH THE REAR BRAKE.
Later...
Brewster...
Quote from: trouble on August 08, 2009, 07:30:55 PM
My 1k did something similar, try blowing out the clutch pack with some compressed air.
Especially if you've got the stock cover on it.
Yep, That seems to be the culprit. Not a whole lot of dust came out ( I plan on doing a better job this week end). She definitely moves much better, shifts are smooth and I think she is just happier. As far as the brake topic, I really try to get off the throttle early and engine brake then for straight stops, I 'll use a little rear. I used to never used to use the rear until a car jumped out in front of me (i grabbed way too much front (only)) and put me out of commission for 4 years. Now I do my best to at least cover it in case something similar reoccurs. Beside that, she squeals like a pig.
On second thought, maybe that did not fix it. The more I think about it, it feels as if I am starting out in second gear. it starts chugging and kinda lurching. Even if I give moderate throttle. I now have 7100 miles and will be at the dealer within a week for the first service. My thoughts range from carb sync to warped rotors to worn clutch. Will post with results
Quote from: scduc on August 18, 2009, 02:24:52 PM
On second thought, maybe that did not fix it. The more I think about it, it feels as if I am starting out in second gear. it starts chugging and kinda lurching. Even if I give moderate throttle. I now have 7100 miles and will be at the dealer within a week for the first service. My thoughts range from carb sync to warped rotors to worn clutch. Will post with results
Well, I am going to rule out carb sync, for what I hope are obvious reasons.
I have an 06 S2R1K and I have had similar issues. When starting off from a start in any way other than very slowly and carefully, there is a groan from what sounds like the front left of the bike. I had my belts adjusted (they were way tight) and that didn't fix this issue. I cleaned out my clutch pack and the problem went away for a little while, then returned. I am almost 100% sure that my issue is clutch wear as I can feel modulation in the clutch lever accompanying the sound.
One thing to try is to take apart you clutch stack as really give everything in there a good wipe down. My guess is that the issue will go away for you for a while just like mine did.
Keep us informed of what you come to.
This wouldn't have any real effect on pulling away, but if you have a cush drive rubber coming apart it can make a squaking/dragging sound at low speeds. Frequency will vary with the rate the rear wheel is turning, though. Seems to be a fairly common failure on Ducatis with the single sided swingarm.