Belt

04sxviper

New member
Joined
Nov 17, 2008
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57
Age
47
Location
manitoba
what can i do to stop my belt from squealing at idle and low speeds. The clutches are in align. its driving me nuts
 
on the back of your secondary, there are three bolts, take the secondary off the shaft and remove the washers behind the bolts, then put the bolts back in. should be no more squeel....

lol daman! what we pass on now a days!
 
this need to be in FAQ too...

what Yamidude59 said.....

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Well i would do that but my belt will sit to low in the secondary. If i put my old belt on it won't make noise only with my new belt.
 
Why would it sit low in the secondary? i had to remove the washers out of the back of the bolts when i put my new belt in because i had the same problems, it wont effect Your belt height that much,unless your secondary is Worn out.

new belT= 34.5mm wide,
Broken in belt=32.5mm wide,

removing the washers compensates for the new belt and you will put the washers back in once the belt is within spec.
 
is the center to center distance of the 2 clutches within spec? if the clutches are too far apart, then you will get the tight belt deflection, which will cause the belt squeal at idle. also, playing w/the 3 bolts/washers on the back of the secondary like others suggested, will stop it from squealing. but make sure the center to center distance is correct first.
 
Next time you go shopping for a belt, take one of them "seamstress"tapes and measure the outside of your belt. Then go pick through the pile for one the same length. The belts are manufactured with a tolerance on the overall length, some are shorter, some are longer. Do a search on 'belt deflection' and do some reading. There is also a tech article on what proper deflection should achieve for max performance.
 
Where can I look to find the proper belt deflection spec. I know the center to center, but what is spec on measuring the belt deflection from a straight edge? (Specifically for a 99 600sx) ;-)
 
I just took the shims out of my secondary like daman's pic above. It took less time to do than it did to replace the carbides.

The old belt didn't squeal either, but my new yamaha one did.

15 minutes and I had that fixed.
 
cajones2 said:
Where can I look to find the proper belt deflection spec. but what is spec on measuring the belt deflection from a straight edge? (Specifically for a 99 600sx) ;-)
to my knowledge there is no yamaha spec for that,you adjust deflection with using the proper belt,C/C is within spec then adjust the shims(washers)in the back of the secondary,easy done...
 
A new belt sometimes will need to have the washers removed, as the belt wears you may need to put them back in. If your belt is riding above the secondary, think about removing washers, if below it may be time to add washers. There is more involved then this, but it is a good starting point for tuning the belt deflection.
 
Or ride it for a while. Mine takes one day of ridding for the squeal of a new belt to go away. If I remove washers the belt sits to low even when new.
 
right in the manual, it says to remove the shims when adding a new belt...for that reason so....

I say remove the shims for a while, then once it wears a bit, put em back in
 


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