Clutch rattle.... DRIVING ME NUTS

[kinger]

I would be very hesitant about locking the stub shaft and crank shaft together, they are linked together with the splines FOR A REASON. If they wanted the clutch mounted to the end of the crank, they would have done it and saved the trouble of an extra shaft.

Whats the reason?

 

[Yamajon1]

The style of crank bearing used in the 4 strokes can’t take the loads the belt drive system would place on it. That’s why they run the stub shaft with the roller bearings to isolate the crankshaft and bearings from that load. Locking the shafts together would likely allow some of that to transfer to the engine and may shorten engine bearing life.

 

[STAIN]

Correct. Thank you.
Maybe try a clutch balance or some how tighten the pins/spider SLIGHTLY.

 

[kinger]

One guy posted a video with the clutch off and the noise wasn't any different. Its all in the stub shaft it appears.

 

[STAIN]

Don't know about what that guy was doing, but when I pull the clutch off my Viper with 8500 miles on it it and start the engine----silence. Its the play in the splines, and the weight of the clutch on shaft ,that allows the clutch to rattle. I have had this shaft out to replace the bearing. At 8000 miles there was no significant wear on the splines.

 

[kinger]

Don't know about what that guy was doing, but when I pull the clutch off my Viper with 8500 miles on it it and start the engine----silence. Its the play in the splines, and the weight of the clutch on shaft ,that allows the clutch to rattle. I have had this shaft out to replace the bearing. At 8000 miles there was no significant wear on the splines.

https://ty4stroke.com/threads/clutch-rattle-driving-me-nuts.152652/

Post #13.

Maybe its not so cut and dried. On my new winder with only 65 miles its silent. Lets hope it stays that way.

 

[SaddleBagger]

Who owns a Sidewinder and lets it sit around idling LOL. That sled aint built to stand still!

Amen brother. 4100 miles in 9 weeks this season. Only complaint I have is all of the complaining.

 

[Redbeard]

Here is a short video of my 3 cyl running without a clutch at all. While not as pronounced, the rattle is still there. In saying this, I will quote myself from this thread back in February on page 3, post 31 below.

The rattle is a combination of the piston powerpulses and mass of the spinning clutch, which causes the stub shaft splines to hammer. The clutch sheaves then act like a loud speaker that amplifies the noise.

 

[cannondale27]

Does anyone notice a difference in noise using a 911 cover? I swear it changed the tone a little on mine. I seem to remember some Primaries having a thick piece of rubber on them. Maybe Doo? That may be a route to take.

What about this?

 

[cannondale27]

Here. Something similar but just to dampen noise.

 

[Mk1000]

I have two Yamaha snowmobile products with the very LOUD spline noise issue.

I decided to try a new 2018 Sidewinder and it is just as bad!

Sometimes, a person would like to just ride and enjoy the scenery, but that it is impossible with the spline noise from the Yamaha motor design.

There is no aftermarket fix... as many have tried and failed!

It actually got to the point, this past season, I was wearing earplugs for the fix. Funny thing is... I have poor hearing and I still had to use earplugs to deal with the noise.

The only permanent fix is there will be a perfect, like new, very nice looking, Sidewinder for sale, with only 800 miles on it (hopefully, I won't take too much of a hit).

Don't make the same costly mistakes I have made as the motor noise will win!

I have not heard that there were any changes with the motor design for 2019 models.

Sadly, I have been a long time supporter of Yamaha.

 

[SaddleBagger]

I have two Yamaha snowmobile products with the very LOUD spline noise issue.

I decided to try a new 2018 Sidewinder and it is just as bad!

Sometimes, a person would like to just ride and enjoy the scenery, but that it is impossible with the spline noise from the Yamaha motor design.

There is no aftermarket fix... as many have tried and failed!

It actually got to the point, this past season, I was wearing earplugs for the fix. Funny thing is... I have poor hearing and I still had to use earplugs to deal with the noise.

The only permanent fix is there will be a perfect, like new, very nice looking, Sidewinder for sale, with only 800 miles on it (hopefully, I won't take too much of a hit).

Don't make the same costly mistakes I have made as the motor noise will win!

I have not heard that there were any changes with the motor design for 2019 models.

Sadly, I have been a long time supporter of Yamaha.

http://www.trailjamz.com
Try this and enjoy the great ride & awesome power. If that dont work for ya I will start the bidding on that poor excuse for a Yamaha at $5,000.

 

[ryama]

I have two Yamaha snowmobile products with the very LOUD spline noise issue.

I decided to try a new 2018 Sidewinder and it is just as bad!

Sometimes, a person would like to just ride and enjoy the scenery, but that it is impossible with the spline noise from the Yamaha motor design.

There is no aftermarket fix... as many have tried and failed!

It actually got to the point, this past season, I was wearing earplugs for the fix. Funny thing is... I have poor hearing and I still had to use earplugs to deal with the noise.

The only permanent fix is there will be a perfect, like new, very nice looking, Sidewinder for sale, with only 800 miles on it (hopefully, I won't take too much of a hit).

Don't make the same costly mistakes I have made as the motor noise will win!

I have not heard that there were any changes with the motor design for 2019 models.

Sadly, I have been a long time supporter of Yamaha.

Unless yours is much louder than everyone else's. Your over reacting period. No question it's annoying at a idle. But when driving its barely audible.

But good luck with whatever you buy.

 

[STAIN]

I have two Yamaha snowmobile products with the very LOUD spline noise issue.

I decided to try a new 2018 Sidewinder and it is just as bad!

Sometimes, a person would like to just ride and enjoy the scenery, but that it is impossible with the spline noise from the Yamaha motor design.

There is no aftermarket fix... as many have tried and failed!

It actually got to the point, this past season, I was wearing earplugs for the fix. Funny thing is... I have poor hearing and I still had to use earplugs to deal with the noise.

The only permanent fix is there will be a perfect, like new, very nice looking, Sidewinder for sale, with only 800 miles on it (hopefully, I won't take too much of a hit).

Don't make the same costly mistakes I have made as the motor noise will win!

I have not heard that there were any changes with the motor design for 2019 models.

Sadly, I have been a long time supporter of Yamaha.

I call B.S. There is NO WAY that clutch rattle requires earplugs. B.S.

 

[woodysattak]

Just bought 2017 and is very smooth and quiet. Owned 2007 attak and the clutch did rattle a bit but in no way bothered me in the least. Every sled has certain noises track clutch, exhaust just ride and be happy. I have owned all four brands and more during 50 years of snowmobiling and I can tell you if a little clutch noise bothers you go back and ride a 1970's sled a see what it was like. Just ride and enjoy if the only thing to complain about is clutch rattle and a few blown belts try riding back in the day. Thanks Kurt