Drag/Rubbing?

[scduc]

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.

[Citypol86]

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...

[scduc]

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?

[brimo]

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?

[scduc]

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?

[erkishhorde]

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.

[brimo]

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.

[needtorque]

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.

[corndog67]

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.

[caperix]

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.

[Slide Panda]

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.

[red baron]

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.

[RUFKM]

Pulses when using front brake = warped disc.  Very common with the stock duc discs.

[needtorque]

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. 

[Slide Panda]

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.