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Discussion Starter · #1 ·
2018 with 35k on it. I suddenly got this humming noise today. It is speed dependent. I suspected tires at first but weaving back and forth makes no difference in the sound. I can pull the clutch in and it makes no difference either. Below about 30 mph I cant hear it. It kinda sounds like a bearing. I used a temp gun and shot my drive pulley and front wheel bearings... 134 degrees. Anyone have a clue what could be generating this humming?
 

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Discussion Starter · #4 ·
I’ve run into the same thing Rob.
I must say though, I recently replaced my brake pads and tires and now I don’t have it.
At first I thought it might be the drive belt, but mine seemed to be coming more from the front. How about you?
It is so hard to distinguish where sounds come from, at first I thought front but if I lower my head and lean to the left I think rear, if I spread my legs it sounds like the drive pulley area.
 
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Discussion Starter · #6 ·
Brake pad oscillating makes sense. Jack bike up, spin wheel, any drag?
I'll do that tomorrow but dont have high hopes. I put about 150 miles on it Sunday and parked it with no issues. Started it up today and noticed the noise immediately.
 

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Discussion Starter · #9 ·
Hey Rob I know this is a wild thought but I had a hum that turned out to be a missing push revit on the fairing. Only noticed it at moderate speed and not very consisten. Maybe there is something missing or coming loose. Did you remove or add anything new? Just hoping to spark thought.
Nothing been touched. I'll poke around on the fairing but I believe it is going to be the drive pulley bearings based on where I think the sound is coming from but I would think it would generate more than 134 degree heat. I'll check rear wheel and bearings tomorrow.
 

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Discussion Starter · #13 ·
Do you detect any scent? On my Rocket III, the front bearing went dry in a sealed unit. I smelt the hot metal and tracked the issue by nose.
I know yours is not the front bearing as you have check it with the heat gun, that would seem to rule it out as a bad bearing gets quite hot.
My only other old school trouble shooting techniques would be to touch and or feel for anomalies along all moving parts of the drive train; preferably while lifted.
Don't smell a thing but it has to be in the driveline.

Update - I ran it up to 70 and shut down the engine with the clutch in, noise did not change. Yamaha shop called and said I could bring it in on 8-18...same date I had already been told.
 

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Discussion Starter · #16 ·
I took it in today. Local Yamaha dealer noticed a trailer hitch and said Yamaha may not warranty any drive failures. I just said let me know. I suspect it is a bad drive pulley bearing. I am not happy with the failure and certainly will not if they dont honor their warranty.
 

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Discussion Starter · #19 ·
Yamaha called me today. He said all bearings are good. The only thing the could find was the belt looked slightly more worn on one side. (I looked at the belt before taking it to them and to me it looked fine.) He recommended a new belt...$995. Not gonna happen.
 

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Discussion Starter · #21 ·
Someone needs to make a quick tool that lays on the pulley and belt to be able to easily see alignment of the belt
I am going to look again when I pick it up but I was pretty thorough looking at the driveline before I took it in. I told them not to replace the belt. I plan on loosening the belt slightly and seeing if the noise changes...plus I want to see if there is actually "more" wear on one side. At this pint I will most likely get rid of Yamaha and go back to Honda. A $1000 after 35k miles is $1000 more than my Wing cost me in 135k miles.
 
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Discussion Starter · #22 ·
I did find the belt a lot chaper. Does anyone know of a compatible belt or a less expensive place to purchase?
Text Font Product Design Brand

97949
 
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Discussion Starter · #25 ·
@Bucfan11 before you give up Rob, there was a guy on one of the Venture/Eluder owners Facebook who said he knew exactly what this issue is.
He’s ridden Raiders with same engine for years.
He said that if you pull off the cover on the right side by your foot that underneath you’ll find a shaft with a nut and cotter pin. He said to remove the cotter pin, put red thread lock on the nut and tighten using an air impact driver. He said that it needs to be done at the initial break in of 600 miles and again at around 35-40k miles.
Before spending money, spend a little time and try it out. I’m hearing the same noise and am going to do this after work on Friday evening.
Here’s a pic of the convo.
View attachment 97957
I'm broken hearted you didn't recognize me Tony... You see the good looking bald guy he is talking to? That's me!
 

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Discussion Starter · #28 ·
Following up, I know there is a fairly extensive “16,000” mile maintenance recommended for this bike, just as it was for the ‘liners. I recall one of the items on the list is a steering head bearing repack. Anyone know if tightening this drive pulley nut is on the list? Don’t recall.

I did have my dealer do the 16k on my 2008 ‘liner and I never had any problems whatsoever with it, not that one bike means much...
I am fairly certain the "tighten drive pulley nut" is not on the list.
 

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Discussion Starter · #30 ·
Update... I picked it up today and paid $164 for them to tell me it was the belt and not covered under warranty. On my way home I noticed the rear brakes felt funny so I pumped them which caused a hurendous sound from the rear. I was closer to home than the shop so I slowly rode home and tried to stay off the rear brakes. I got home and removed bags so I can check belt and now rear brakes. Belt looks good to me. I'll have to update on the torque of the drive pulley until my neighbor gets home so I can steal his 31mm socket. The rear brake...


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Discussion Starter · #32 ·
Good news is the rear brakes are fixed! I took off the front pulley and inspected and reinstalled. Noise is still there. It looks like I'll buy a new belt and install, it also looks like it will be a real pia to install it too. No way will I keep this long term. I guess I'm in the market for a new/nearly new Wing.

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Discussion Starter · #34 ·
Adding on to my post. If they cannot install br

So you heard the noise when it just sitting there idling?
No, sorry, should have been clearer. I start to hear the noise around 35 mph. It gets louder with more speed.
 

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Discussion Starter · #35 ·
I ordered the belt from Partzilla...site said delivery 8-29. I'll tear it down once the part ships.
 

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Discussion Starter · #37 ·
I would lean more towards one of the tires. Check for cupping or strange wear. I had a rear dunlope that starting humming like yours is doing. Tire looked pretty good. Took a chance and replaced it and humming was gone. Good luck with whatever you decide to do.
I thought of tires, they both look good and weaving Bach and forth at 60 mph makes absolutely no difference in the noise.

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Discussion Starter · #39 ·
Alright guys, easy stuff first. I added air to my tires and went for a 3 mile ride...no luck. I shot all bearings temps, about 113 except the left rear, it was 144. However the brake is on that side. I figured I had to remove the rear wheel to change the belt so I did and hand checked the bearings, one of them felt a little stiff but it was smooth. The bely looks fantastic to me. While I was under there I took a good look at what it took to remove the belt and figured a knife would work great! :). There are 6 bolts that hold the sub-frame to the frame, 2 upper and 1 lower on each side. I have to remove the front drive pulley, the lower sub-frame bolt and unplug a small wiring harness so maybe it wont be so bad. Bike is tore apart and scattered in my garage now so I expect the belt to suddenly be on back order.
 

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Discussion Starter · #41 ·
Here is a direct quote from Yamaha: "belt tension is part of maintenance of the unit and should be checked/adjusted every 2500 miles. There is no warranty coverage for this." I have ordered a new belt and will replace this one but it certainly looks good to me. I will not be keeping this even if the belt is the problem, no way should it need replaced so soon and some of our trips I would have to stop twice and have the belt adjusted... No gonna happen.

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