Primary not shifted out all the way

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KneeDown

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00 SRX 700, all stock except for carbon tech reeds.Powervalves working good(repaired and set last year)

8DN-20 weights, dunno what how much weight in each holes. Hauck X helix, Hauck sno cross spring at 80 wrap. Engagment is 4500 i think and is spot on at 8500 across the field.

Was looking at the clutches and noticed there was about an inch left on the primary that the belt doesnt touch. Is this just normal for a trail clutch set up? Sled has awesome pull(when it hooks) but doesnt seem as fast as it should on top end. Maybe the sled isnt hooking up enough or maybe I need more room to get it to shift out more? What do you guys think?
 
should be about an 1/8 of inch marking off the top of the primary. Best to do is take marker and mark a line from top down and see were it stops. Could be belt or a number of things.
 
Yeh i did the marker trick, if I get home early enough maybe I can take picture to help?
 
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forgot to add, put new buttons in the secondary bout a week ago. If you guys need any more pics of anything lemme know.
 
It doesn't look like those clutches have been apart for awhile. Something might be binding like your primary cover bushing or you could have some extensive wear like your rollers. Your secondary bushing could be binding too.
 
Secondary clutch was cleaned a week ago, and the the bushing did seem to have a lil slop in it, but didnt seem excessive to me. I figured yamaha left a lil room for dust, foreign material etc. , maybe im wrong. Primary was cleaned last season, but only went for 2 rides so I figured it was fine. I have a clutch puller, guess Ill take the primary off and take a peek. How would I check if the primary spring is binding?
 
Slide the cover on with no spring and see how much side to side slop it has by expanding and collapsing the clutch and rocking the cover.

Another thing that can cause this is spring binding. Is that a spring that is made for the YXR?
 
did you oil or grease some of the clutch parts because the secondary is way too dirty for having been cleaned? Secondary spring too stiff and not letting the primary shift all the way out?
 
If that's a Red Yamaha Secondary spring he would have to have the twist at a fairly high degree being that is one of their softest secondary springs.
 
Not sure about the primary spring , but that was my first thought when I saw the primary not shifting all the way was that the spring was binding. The secondary was cleaned well it just has corrosion on it from sitting outside. Ill take the secondary off tomorrow and report back to you guys. The secondary shouldnt be greased right? Figured it would attract dust and make it worse.

journeyman- when I first got this sled, I emailed pics of the clutches to Hauck to figure out what I had and they said the secondary spring was a Sno Cross spring? Ill check my email again to double check what they said.

Edit: This is the response I got from Hauck


I can tell that is has an X helix, Hauck Red Sno-x spring, and is set @ 6 in the helix. That spring shouldn't be set any lighter than 6-3 so I would assume that it is on 3 in the clutch.

Thanks, Titus
Hauck Power Sports, Inc.
2072 19th Street
Rice Lake, WI 54868
P: (715) 234-6195
F: (715) 234-5485
 
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Boy I am not sure how stiff of a spring that is. In the Yamaha lineup for these sleds it goes Red, then Green ,then Silver. I run a silver in my Viper with the Heavy Hitters.
 
hauck springs might have different indexing like other aftermarkets making the numbers not jive with what you'd do with a yammie spring. cant say for sure but something to find out
 
Talked with a Yamaha tech today who worked on these sleds when they were new and he said the only way he found to make them fully shift out is to re-machine the clutches. Anyone else ever heard this?

Also took the primary apart today and everything was fine. Measured the rollers and they were stock size. All bushings seemed fine. While I had it apart I clamped both sheaves together until they bottomed out and then put the belt in and it was still below the edge of the sheaves by about 1/4". Should have taken pics of that, but didnt think of it at the time.
 
You don't by chance have a short cover on the primary with a long spring or something? Put the primary back together, set it on the floor, spring side up, & stand on it, make sure nothing is binding when you do that. belt should be 1/4 - 1/8" down from top of sheave, depending on belt wear. New belt width is 34.5mm, wear limit is 32.5mm, check that also. other than that, soften up the secondary setting & try it again.
 
Dont know if I have a short or tall cover but I measured the primary coil when I had it out and it was 3 7/8" free length with a tape measure, stock spec is 3.6" from yamaha repair manual. Coil didnt show any signs of it binding, I figured i would see paint rubbed off on the bottom of the coils, but nothing.
 
I think that is pretty common for rideing the trails not unless you have real fast ones.As you have said you are going to have to hookup on a road or lake for top end markings.Lossen the sring tenshion on the sec ramp and try it i will shift farther than a stiff setting.
 
KneeDown said:
Talked with a Yamaha tech today who worked on these sleds when they were new and he said the only way he found to make them fully shift out is to re-machine the clutches. Anyone else ever heard this?

Also took the primary apart today and everything was fine. Measured the rollers and they were stock size. All bushings seemed fine. While I had it apart I clamped both sheaves together until they bottomed out and then put the belt in and it was still below the edge of the sheaves by about 1/4". Should have taken pics of that, but didnt think of it at the time.
Click to expand...

Yes that is true but the photo you have shows somewhere between a half inch to three quarters of an inch left to go. Normally the belt stops climbing at around one quarter inch from the top on a stock Yamaha primary. I have done the 1:1 machining of the Yamaha clutches in the past and haven't seen a big enough difference to warrant doing it again. I like how Yamaha has theirs machined. I believe it's one of the reasons they don't blow belts like brand X sleds.
 
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