Float or not to float

[yellow rider]

Been watching the concerns with blown belts on this site. Typically this is a non issue with Yamaha till lately with the viper and new sidewinder. Having only 67 miles on my winder I am cautious to what rate my belt is wearing.

One of thing I noticed is the secondary is no longer floating. It is in a fixed position. This means alignment is critical and does not allow any deviance. Skidoo and Cat are like this as well which I am not a fan of. What I have done is installed the three 6mm bolts into the back of my secondary to set my belt height (as previous models) and added extra washers onto the 14mm bolt between the big end washer and the internal spacer giving me room to allow the clutch to float .

I'm not saying this is the total answer because I have yet to try it, but it is the one change that has been made to the configuration other than the overdrive feature, and now we are seeing belt failures. This could be why some are blowing belts and other aren't.

 

[NOS-PRO]

Been watching the concerns with blown belts on this site. Typically this is a non issue with Yamaha till lately with the viper and new sidewinder. Having only 67 miles on my winder I am cautious to what rate my belt is wearing.

One of thing I noticed is the secondary is no longer floating. It is in a fixed position. This means alignment is critical and does not allow any deviance. Skidoo and Cat are like this as well which I am not a fan of. What I have done is installed the three 6mm bolts into the back of my secondary to set my belt height (as previous models) and added extra washers onto the 14mm bolt between the big end washer and the internal spacer giving me room to allow the clutch to float .

I'm not saying this is the total answer because I have yet to try it, but it is the one change that has been made to the configuration other than the overdrive feature, and now we are seeing belt failures. This could be why some are blowing belts and other aren't.

Yellow rider - Your secondary does float. It just doesn't float when you are in a parked position.

Push in on your secondary, let the belt drop down a little bit where the helix moves in a little.....now you can move your secondary back and forth.

 

[yellow rider]

I see what your saying NOS.

 

[NOS-PRO]

On the SW, Yamaha did the washer shims for belt deflection on the main bolt for the secondary instead of the 3 8mm bolts that used to control belt deflection.

Now, the large washer that is on your secondary bolt holds the helix at a certain dimension so the secondary sheaves don't come together and the result is no float when you are stopped, but it floats again once you start moving.

 

[T-Mod]

Been watching the concerns with blown belts on this site. Typically this is a non issue with Yamaha till lately with the viper and new sidewinder. Having only 67 miles on my winder I am cautious to what rate my belt is wearing.

One of thing I noticed is the secondary is no longer floating. It is in a fixed position. This means alignment is critical and does not allow any deviance. Skidoo and Cat are like this as well which I am not a fan of. What I have done is installed the three 6mm bolts into the back of my secondary to set my belt height (as previous models) and added extra washers onto the 14mm bolt between the big end washer and the internal spacer giving me room to allow the clutch to float .

I'm not saying this is the total answer because I have yet to try it, but it is the one change that has been made to the configuration other than the overdrive feature, and now we are seeing belt failures. This could be why some are blowing belts and other aren't.

Short belts for the present center distance between your clutches is what causes belts to break. Too much variation of belt length.

 

[JestersYamacat]

We are seeing some measure almost 3 quarters of an inch difference and the longest one was just a tad over spec. I think you will find that those that are breaking are actually out of spec belts. I like a slightly long belt as they tend to run cooler and hold better when run to top of primary.

Jester