Clutch maintenance - Yamaha Grizzly ATV Forum
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post #1 of 17 Old 06-03-2019, 06:30 AM Thread Starter
 
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Clutch maintenance

Quick question for you guys. I have a 2015 Grizzly with 2100 miles on it. Primary clutch has never been apart. It has never been in water for very long, just crossing streams etc. Should I take the primary apart and re-grease? It works fine right now. Is there a maintenance schedule you all follow?

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post #2 of 17 Old 06-03-2019, 09:43 AM
 
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Download the manual and follow it to replace the grease in the clutch. It shouldn't be muddy if the belt housing has never gotten water in it. But the grease still fills with dust over time, most people suggest servicing it every 1500 miles. Or servicing it ASAP if you do ever flood it.

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post #3 of 17 Old 06-03-2019, 10:11 AM
 
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I would probably pull it apart, clean, inspect and re-grease it every two years if you dont get water in it. Its a good time to inspect the sheaves and belt anyways along with toss in a shim of you like.
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post #4 of 17 Old 06-04-2019, 09:00 AM
 
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I just serviced my 2008 grizzly 700 primary for the first time this spring. I had 6850 miles on it and it was still working fine only did it to change the belt since was is 11 years old. Belt still looked good and most likely would have made it until the end of this year but the mileage would be around 10,500 miles and I want to ride and not work on a atv during the riding season. You would have to get in water above the top of your seat to get water into your clutch on a 700, as long as your hose clamps for the inlet and outlet tubes to the clutch cover are still tight. When you start losing top end speed from water or dust in your primary then clean it.

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post #5 of 17 Old 06-04-2019, 09:09 AM
 
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I ride about 2000 miles a year. I service mine every spring. My last time doing it, I noted the grease on the two bushings the movable sheave slides on had almost dried up after only one year.
Also noted my belt was fairly worn so I replaced it. Proves good maintenance stops issues before they start. My bike is currently at 7000 miles btw


If you do alot of dusty trails the grease your primary will clump up much quicker.

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post #6 of 17 Old 06-04-2019, 09:13 AM
 
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Yep, the service interval is hugely dependant on how and where the machine is used. If you ever ride in dust, the grease won't last very long.

I would HIGHLY suggest you not wait until you notice a top speed loss or performance loss to do clutch maintenance, unless you like to have extra worn out parts that need to be replaced (aka sliding sheave bushings/seals). That gets expensive when it could be avoided by servicing it at normal intervals. And you generally won't notice the performance loss until its much worse then you realize because it's a gradual change.

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post #7 of 17 Old 06-05-2019, 12:30 PM
 
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I guess if you like to grease your weights and sliders than do it. I just cleaned and removed all grease from the weights and sliders on my 2008 700 grizzly. I have already put on 500 miles like this and will put on another 3,000 this summer. So I guess I will find out if I wreck any weights or sliders by running it grease-less.

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post #8 of 17 Old 06-05-2019, 12:37 PM
 
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Quote:
Originally Posted by wvmtwins View Post
I guess if you like to grease your weights and sliders than do it. I just cleaned and removed all grease from the weights and sliders on my 2008 700 grizzly. I have already put on 500 miles like this and will put on another 3,000 this summer. So I guess I will find out if I wreck any weights or sliders by running it grease-less.
The 2008 weights in yours are an older style weight that wears out super fast if they're used without grease. If you want to go grease less, atleast go to the 2011+ weights.

Also, it's not always just your weights that get worn out. It could easily ruin the channels that your weights ride in on the movable sheave. The movable sheave is a whole lot more expensive then just replacing some worn weights.

Just curious, why would you not want to run the grease anyways? Not really any downside to using the grease..

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post #9 of 17 Old 06-05-2019, 12:53 PM
 
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The part numbers for clutch weights and sliders is the same for 2007 - 2015
Unless something changed in 2011 with the weights and sliders and the parts you now get for the 2007 - 2010 are this newer style I don't know what the difference is.

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post #10 of 17 Old 06-05-2019, 01:24 PM
 
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I am assuming that you aren't able to order the older style anymore, so if you ordered them for an 07 then you would get the new style automatically. Something like the older ones had a two piece outer plastic piece made out of a different type of plastic then the new style. And the new style have one single outer plastic piece that was bonded better to the inner metal sleeve.

But somebody else would have to give you better details, mine is a '14 so I have never messed with the older style weights, just heard that they can't take the extra heat of running greaseless and don't last long at all.

Either way though, I don't really see any benefit to running either of them greaseless.

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post #11 of 17 Old 06-05-2019, 02:10 PM
 
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Yes that older style was on the 660's. In the next day or two will open the primary and compare it to a 2011 mine are still original from 2008 and are the one piece design. And I will put a small amount of grease on the weights and sliders. It was an experiment to see if I could get more top end speed all though when I hit 60 mph with the wide tires on gravel I didn't pursue this idea. Other reason was cleaning my 660 many times before I snorkeled it was a pain. The 700 clutch ducting is greatly improved and it would be very hard to get any water in the clutch where I ride. So I guess a little dab will do.

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post #12 of 17 Old 06-05-2019, 02:15 PM
 
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Yeah I would add some grease in there. I agree that if you swamped it then it is more work to clean it out, but if you swamp it without grease in there you still have to take it out to clean the clutches at that point anyways (grease or no grease, you have to remove the sand/dirt/mud from the moving parts). That's about the extent of the benefits though. Greasing them should make your clutch quieter and some people say the back shift is quicker/smoother with the grease.

I was worried about adding too much grease and affecting top speed as well. But after looking at how it works, you have to add a lot before it would get to that point (and the guy I bought my machined sheave from confirmed this). My clutch has a normal amount of grease in it (I say normal, it looks like a lot to me, but it's a normal amount for a Yamaha cv setup) and I hit 70mph on a GPS with 27" zillas, a jbs sheave, and everything else bone stock. So I don't think you have anything to worry about with losing top speed as long as you don't go crazy and add way too much.

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post #13 of 17 Old 06-10-2019, 09:04 AM
 
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The problem with the grease is even with out water and silt..dust, dirt, belt shedding accumulates in the grease. Overtime it can turn into something closer to fibered plastic roof cemented.

I reported that the 2011 machines had similar roller weights to Dr Pulley's...the covers were a different type of polymer fused to the weight. I ran those for approx 5000 greaseless with no show of wear. I don't know when Yamaha changed to this product.

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post #14 of 17 Old 06-10-2019, 10:12 AM
 
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Quote:
Originally Posted by Vincent View Post
I ride about 2000 miles a year. I service mine every spring. My last time doing it, I noted the grease on the two bushings the movable sheave slides on had almost dried up after only one year.
Also noted my belt was fairly worn so I replaced it. Proves good maintenance stops issues before they start. My bike is currently at 7000 miles btw


If you do alot of dusty trails the grease your primary will clump up much quicker.
Is there a trick to replacing these bushings? Or do you just pry them out with a screwdriver? Then do the new bushings just get pushed back into place?

The reason I ask about this is that, earlier this year, I cleaned around the bushings as best as I could and they didn't budge. Seems like they are really stuck in there. It would have been nice to take them out to clean as long as they can be reused and pushed back in. But I was afraid to damage them and I didn't have any replacement ones on hand.

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post #15 of 17 Old 06-10-2019, 10:17 AM
 
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Quote:
Originally Posted by Vincent View Post
I ride about 2000 miles a year. I service mine every spring. My last time doing it, I noted the grease on the two bushings the movable sheave slides on had almost dried up after only one year.
Also noted my belt was fairly worn so I replaced it. Proves good maintenance stops issues before they start. My bike is currently at 7000 miles btw


If you do alot of dusty trails the grease your primary will clump up much quicker.
What kind of grease did you use on the bushings? The Yamaha ultramatic grease is not supposed to be used on the bushings. It is only for the weights themselves. There is a different grease that you need to use on the bushings and in the secondary.

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