Clutches...Whining Sound

[tdblakes]

x2. that is my bet!

Thats very possible, but its so much louder on the clutch side than the chaincase side... but never know. Pinpointing a sound can be tricky

 

[Skeld]

x2. that is my bet!

Um, so you're suggesting I'm riding the brake? It sounds like it's coming from the clutch side for me, not the brake side.

 

[Clarke673]

no im not saying you are riding the brake, but the rotar and pad are in constant or near constant contact. IT makes noise. It bugged the hell out of me when i first hoped on my pro. Now i am used to it.

 

[Idahodoo]

Are you sure it is not brake rotor noise?

Possibly I changed the stock RMK rotor to the light wt one and first time out riding I noticed a similar noise that was not there with the stock one, 400 miles on it after the swap and it is slightly quieter.

My son rode my sled for the first time Saturday down the trial for about 5 miles & the first thing he asked me was what it that winning noise.

 

[Skeld]

no im not saying you are riding the brake, but the rotar and pad are in constant or near constant contact. IT makes noise. It bugged the hell out of me when i first hoped on my pro. Now i am used to it.

Hadn't thought of that. Could be, but it seemed more related to the drivetrain being under a load...but maybe it just becomes more apparent as the drivetrain speeds up?

 

[cole_151]

Same noise

I have a 2012 RMK ASSAULT at 400 miles it started doing the same exact noise if i jab the brake it will stop for a little while i have no idea what it is other than that its coming from the clutch side

 

[Skeld]

Hopefully one of you other guys is either a good mechanic, or has a good dealer, since it's more likely I'm going to get hit by a meteor right now than my dealer figuring this problem out.

 

[Skeld]

Ok, the verdict is in and I'm rather skeptical. The tech claimed that the clutch had some grease/oil around it somewhere possibly from assembly, and led me to believe that he thinks the clutch was actually spinning on the end of the crank...is this even possible??

At any rate he cleaned the primary up some so maybe that will help.

I was attempting to set the belt deflection...I was picturing that allen screw as having some resistance when you turn it, but it has very little. Is that normal? Am I supposed to be measuring the slack in the belt or is there a better method? This seems kind of imprecise.

 

[skibreeze]

Yes it is possible for the primary to spin on the crank. The belt deflection should be at 1 1/4"

 

[BigWill]

Put your sled up on a track stand, at idle the track should barely be creeping around. Thats usually when your deflection is pretty well on. Not sure on the screw tightness but Im pretty sure they are usually fairly easy to turn

 

[Demo250]

Hopefully one of you other guys is either a good mechanic, or has a good dealer, since it's more likely I'm going to get hit by a meteor right now than my dealer figuring this problem out.

Assuming what your dealer did doesn't fix it, if I had to guess, I would say it is the brake. Grab the brake gently when you are at high speed and you should hear the noise get louder. Some of the noise you are probably hearing is the sawtooth design, some of it would be the slight drag on the pads.

 

[JonezyBones]

I went riding today and mine definitly is getting louder. And I know its not the brake because I have that noise too. I also noticed the loss of high rpms. Was never consistant tho. (Unlike the consistant noisy brake) . Looks like Im gunna have to buy a clutch puller and see what the shaft looks like. What I find odd tho is if it was spinning on the shaft then wouldnt you notice a spike in rpms and no go? My sled definitly pulled hard all day when I heard the noise. You'll have to let us know how your next ride goes to see if its cured.

 

[Skeld]

Rode 250 miles this weekend. The brake is definitely some of the noise, which seems to come and go and is related to the speed of the drivetrain. But I still have the whining noise under a load which is purely related to how hard I'm loading up the drivetrain with throttle...it does seem a little better now though. From a start it seems to grab harder but not great, maybe that's just the way this sled is where the track can hook so hard.

Interestingly now it seems to only pull 7950 RPM most of the time rather than 8200 that it was before it went in the shop. I'm not going to mess with it, it works fine for me the way it is. It is one slow machine compared to my old Renegade but most of that is pushing that track. It goes great in the snow.

One other complaint that matters little to you guys is that the hyfax is hyper sensitive. I have to run plowed roads from time to time and this sled can't make it 100 feet down a surface like that without the scratchers. I'm pretty sure it's because of the Comp track. I think I will either change it for a 5.1 or a Powerclaw before next season, as the RMK 600 in my group has no problems, as well as all of the Summits and an M8 and an XF High Country.