Secondary belt height min and max # of washers (total mm)

[02xtreme]

Bought a used Apex. There is (1) 1mm washer on each bolt. Belt is old and well below the secondary and out of deflection spec. What are the max number of washers (total mm) you can put on each bolt before the sheaves will bind/bottom out? And what are the min amount of washers (total mm)?

Searched and couldn't find this info.

Thanks

 

[ecopter]

The best thing to do is go by the owner's manual recommendation on belt width, not how many washers you can add. As for minimum washers....that would be zero.

jf

 

[Rich Kay]

You will find it hard to get a nice belt height adjustment (1-2+mm) above the secondary . This would be with c/c being right on and in "spec" and a new belt at new spec demensions. Thats is just the way it is with yamaha belt lengths. I feel they are just a bit to short if ya ask me .I will measure the belts on the shelf at dealers to look for the longest possible to help with a good belt adjustment. As far as the least # of washers .... you should always leave one in place. More washers= higher belt less=lower belt height. Best tip I can give is to adjust the belt so the track just begins too"creep" (turn forward) with the sled idling on the stand. The sled shows even after a FULL SHIFT run in perfect conditions and a aftermarket helix cut to allow the secondary to completely open that it could still could shift out a bit more, closer to a 1:1 ratio. Know that gearing also can have an effect on this FULL SHIFT topic. As ya can tell .... this is a pet peeve of mine, hope I didn't over do it for ya.
Happy trails.
Rich Kay.

 

[bottlerocket]

Are you guys buying washers to add from the dealer?

 

[vice108]

Are you guys buying washers to add from the dealer?

I just get thin alum ones at the hardware store

 

[Super Sled]

Are you guys buying washers to add from the dealer?

I just get thin alum ones at the hardware store

I did too. Perfectionists will tell you not to do this as they are not as perfectly sized to match each others width exactly as the Yamaha ones. But they are good enough for me.

 

[pro116]

An old racer trick too you can take the boldt and washers out and use arctic cat spacers on the shaft in the secondary too.That way it's true you don't have to worry about one boldt being in slightly farther of course this prcedure will take longer then the external boldt/washer set up.

 

[kviper]

Are you guys buying washers to add from the dealer?

I just get thin alum ones at the hardware store

I did too. Perfectionists will tell you not to do this as they are not as perfectly sized to match each others width exactly as the Yamaha ones. But they are good enough for me.

I don't see where it would ever be noticeable! Keep in mind the very second the clutch is opened the washer's (shim's) have absolutely no effect on anything. I do buy the shim's from Yamaha but I have used other's. Yamaha makes 1.0 and .5 shim's. Set your ride height with a new belt, adjust again after break in 50 to 100 mi and you should be good for at least a thousand mi unless something is wrong causing premature wear. One thing I see a lot is people starting a cold sled with froasted up clutches and trying to hop on and ride off. Put the sled on a stand, run it to whipe the frost off the clutches and you will be able to ride off with out burning up your belt. A longer belt will allow for a higher ride height with out squealing=lower engagement ratio or easier roll away but a shorter belt will give more top end providing you are reaching full shift, usually not an issue in a trail app. If you are going to buy shim's get the .5's as the 1.0's are to big of a change for fine tuning.

 

[02xtreme]

So how many shims do I need to buy?? 2 x .5mm per bolt??

 

[sleddog66]

So how many shims do I need to buy?? 2 x .5mm per bolt??

I would think .5 and 1.0 per bolt would give you 3 choices......0.5 or 1.0 or 1.5. If you thought you needed more another 1.0 would give you choices of 2.0 or 2.5, but I don't think that you would need that much.

 

[kviper]

They come with one 1.0 on each bolt. Adding one .5 per bolt with the 1.0 for wear is all I would go and then it's time for a new belt when it needs adjustment again. Some times I run just the .5 when putting a new belt on-just so I don't have to listen to it if it squeals. Then after the first ride I go to the 1.0 and then 1.0 and .5 the next time it need's adjustment. This should get you a minimum of 1,500 Mi on a belt depending on riding style and condition's.

 

[gun nut]

belt

Install an adjuster, and forget about washers.

 

[sleddog66]

Re: belt

Install an adjuster, and forget about washers.[/quote

Kinda like the polaris adjuster?? Does someone make an adjuster for the Yammie clutch??]

 

[titanrcr]

Re: belt

Install an adjuster, and forget about washers.[/quote

Kinda like the polaris adjuster?? Does someone make an adjuster for the Yammie clutch??]

Yes, Bender Racing makes an adjuster.