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Hi everyone,
As you all know, Coffee (Dean) passed away a couple of years ago. I am Dean's ex-wife's husband and happen to have spent my career in tech. Over the years, I occasionally helped Dean with various tech issues.
When he passed, I worked with his kids to gather the necessary credentials to keep this site running. Since then (and for however long they worked with Coffee), Woodschick and Dirtdame have been maintaining the site and covering the costs. Without their hard work and financial support, CafeHusky would have been lost.
Over the past couple of weeks, I’ve been working to migrate the site to a free cloud compute instance so that Woodschick and Dirtdame no longer have to fund it. At the same time, I’ve updated the site to a current version of XenForo (the discussion software it runs on). The previous version was outdated and no longer supported.
Unfortunately, the new software version doesn’t support importing the old site’s styles, so for now, you’ll see the XenForo default style. This may change over time.
Coffee didn’t document the work he did on the site, so I’ve been digging through the old setup to understand how everything was running. There may still be things I’ve missed. One known issue is that email functionality is not yet working on the new site, but I hope to resolve this over time.
Thanks for your patience and support!
Clutch Slave
- Thread starter ken510
- Start date
flipsidenv
Husqvarna
C Class
21 hrs running that combo and not a glitch. It feels smooth and precise in anything I do. I especially appreciate it on hill climbs when I need to get the revs up for just a split second. I know exactly how far to pull the clutch in and it hasn't changed yet. I imagine it's bullet proof also which is one of the reasons I went that route.
schweikert
Husqvarna
B Class
Where can i get one from?
We have lots of customers running that combo in their bikes. Almost everyone is having great results with this setup. We have gotten a few reports of this combo not sealing correctly, or leaking. The bad reports seem to be coming mainly from the first run of pistons manufactured before August 2009 and early run of slave cylinder. We tightened up our tolerance on the second run of pistons a little for better sealing so it should be taken care of now.
7point62
Husqvarna
AA Class
ken510;132182 said:
Yeah, I bought Clay's 7602 piston kit for my stock (and very tired) slave and then snagged a replacement slave on ebay - which turned out to be a ZipTy job (goodness knows how it got to the UK!)
Works fine. I checked the 7602 piston fit (minus o-ring) in the ZipTy cylinder and it was just fine. Has been very reliable despite lots of abuse.
Ok so I was sold an older model that they admit doesn't work! Guess what? After buying a m/c rebuild kit, 7602 piston, clutch hose, and zipty slave cover using an X ring. I tried the o ring and no luck on sealing. Who the hell would sell old parts that that are known to fail! So I'm out $170.00 and my bike is not fixed! I'm taking those parts off and sending them back. This is BS! And horrible service to offer anyone! 7602 & zipty be expitng some failed oily parts in the mail. And here is why I'm soo upset.
http://www.thumpertalk.com/forum/showthread.php?t=939353
http://www.thumpertalk.com/forum/showthread.php?t=939353
robertaccio
Husqvarna
Pro Class
The OEM (Husqvarna.it) sources the clutch main assy parts from Magura (Master and Slave assys).
http://www.powersports.magura.com/en/home.html
The hyd lines are sourced from Fentubo (usually)
http://www.frentubo.com/home.html
The fluid that Magura calls out is Magura Blood
http://www.competitivecyclist.com/p...&utm_medium=Google+Base&utm_campaign=Datafeed
MotoRex also makes Hyd clutch specific fluid
http://motorexusa.com/prod_detail.asp?id=35
if you use only these OEM stock parts. you will have no beefs with the aftermarket suppliers. Although all these companies are aftermarket suppliers as well. Inside the Magura OEM slave cylinder My 7602 piston with x-ring has never failed me nor did my OEM piston with the x-ring installed (OEM piston with OEM o-ring it failed more than once). the X-ring has been the deciding factor in my case in the Slave dept.
As for the ZipTy CNC slave the team has only used and tested it with the OEM Magura piston with their kit included o-ring no other data is there. All of the ZipTY 450/510s have this mod installed, and they've been winning races with this setup, with riders that put more strain on their machines than anyone on this forum site or other sites.
you can test for slave leakage prior to final install, just push the slave piston in and let the spring return it to the stop clip, if you are careful you can even squeeze the lever but never when the piston is against the stop. That is the way I test it, one hand on the lever and the slave in my other hand with my thumb pushing in the piston then slowly squeezing the lever and fighting the piston as it pushes to the stop (this raises the internal pressure just like the springs of the clutch do when the piston is overcoming the spring force and releases the clutch plates.
Mechanical issues can not involve emotions, they must be troubleshot and worked methodically and logically.
I too have had plenty of issues with my hydro clutch, but now its dialed in, good bad or otherwise, its just a mechanical item, some are solid some are not, you keep grounded and take it methodically. That is it and the best for me on this subject and for the writer of the gripe.
http://www.powersports.magura.com/en/home.html
The hyd lines are sourced from Fentubo (usually)
http://www.frentubo.com/home.html
The fluid that Magura calls out is Magura Blood
http://www.competitivecyclist.com/p...&utm_medium=Google+Base&utm_campaign=Datafeed
MotoRex also makes Hyd clutch specific fluid
http://motorexusa.com/prod_detail.asp?id=35
if you use only these OEM stock parts. you will have no beefs with the aftermarket suppliers. Although all these companies are aftermarket suppliers as well. Inside the Magura OEM slave cylinder My 7602 piston with x-ring has never failed me nor did my OEM piston with the x-ring installed (OEM piston with OEM o-ring it failed more than once). the X-ring has been the deciding factor in my case in the Slave dept.
As for the ZipTy CNC slave the team has only used and tested it with the OEM Magura piston with their kit included o-ring no other data is there. All of the ZipTY 450/510s have this mod installed, and they've been winning races with this setup, with riders that put more strain on their machines than anyone on this forum site or other sites.
you can test for slave leakage prior to final install, just push the slave piston in and let the spring return it to the stop clip, if you are careful you can even squeeze the lever but never when the piston is against the stop. That is the way I test it, one hand on the lever and the slave in my other hand with my thumb pushing in the piston then slowly squeezing the lever and fighting the piston as it pushes to the stop (this raises the internal pressure just like the springs of the clutch do when the piston is overcoming the spring force and releases the clutch plates.
Mechanical issues can not involve emotions, they must be troubleshot and worked methodically and logically.
I too have had plenty of issues with my hydro clutch, but now its dialed in, good bad or otherwise, its just a mechanical item, some are solid some are not, you keep grounded and take it methodically. That is it and the best for me on this subject and for the writer of the gripe.
And if it were a leak why does my bike run perfect for about 10-15 minutes then I have no clutch pressure? A leak always leaks. Not 10 minutes after you drive. There is always pressure in that system. I should see fluid below my sprocket on the frame...... And faint traces on the floor.
EVOXBOBBY;135638 said:
I have been down the same road.. its most likely leaking past the o-ring once enough fluid gets round the o-ring you will lose the clutch(hydro locked)... mine would come back after sitting for 15 min. or so. I did try the 7602 piston then my clutch lasted 30 min... tore it down again & found some pitting in the cylinder bore. So I ended up buying a stock slave cylinder which came with the piston installed due the availability & time. My clutch has now worked fine for months. I still have the 7602 piston on the shelf & may put it in my bike sometime over the winter. No one can say for sure what the trouble is with your bike without looking at it, but i am betting this is the problem.. I have bought several things from 7602 racing & all have been great, but sounds like you burned that bridge. So go buy a stock slave cylinder with the piston pre installed & fix the bike & quit bitching on all the forms
Ok, well I finally have time to respond to this thread. As stated in another thread by me. Here is the direct quote so you don't have to go searching for it.
The first run of clutch slave cylinder pistons that we made had a slightly looser tolerance on the x ring groove. .001" diametrically to be exact. For those not familiar with those types of sizes, that is about 1/3 the thickness of a sheet of paper. We made a handful of prototypes with this same x ring tolerance and sent them out all over the world to be tested by husky riders. We tried to target hardcore racers the most as they are more abusive on things, but we also sent a handful out to just regular Sunday riders. Not one report of leaky pistons came back during the testing phase so we went into production with those tolerances. A few months after this first run of pistons went on sale we began to get a few reports of pistons not sealing properly. The number of reports we got gave us a failure rate of about 3.7%. All the pistons from the first run were sold by February 2010. In every single case of a leaky piston we received, the piston was replaced with a 2nd gen piston absolutely free, or the customers money was refunded. I have even sent out free replacement pistons to people who didn't even buy from us. They were bought through a dealership. In the 4 production runs of pistons I have made a total of 2 refunds, and will apparently will soon be making a 3rd.
So to summarize, the first run of pistons made before August 2009 and sold before February 2010 had scattered reports of leakage. The design was modified in February 2010 and all subsequent runs of piston have used this tolerance. I have never, nor will I ever sell a product I know or suspect to be defective. It absolutely disgusts me that I have to write this. I have worked extremely hard over the last 4 years to build 7602 from the ground up into what it is today. I treat customer support and satisfaction extremely seriously. I thought that level of dedication and commitment was apparent to everyone who has dealt with me personally, but I guess it still needs to be stated. I have always and will always do whatever I can to make a customer happy with his/her experience with 7602. If anyone out there in internetland has a question/problem/comment about any of our products my contact info is listed below.
Now, to Evoxbobby specifically. If you haven't already given up and parted out your bike there is one last thing you might check. The crankcase breather hose leading from the top right side of the valve cover to the air box has been known to cause clutch loss. Check this hose and make sure it isn't blocked, pinched, or melted closed. An obstruction of this hose can lead to a buildup of pressure in the crankcase and this can cause the clutch to malfunction. Good luck.
And to clarify, who ever it was that you called and talked to at 11 and told you to go F yourself, it wasn't here. The last time we spoke was on 12/02. You are confusing us with someone else.
Clay Hamilton
Owner 7602 Racing
PO box 143
La Jara, CO 81140
719-274-0606
info@7602racing.com
The first run of clutch slave cylinder pistons that we made had a slightly looser tolerance on the x ring groove. .001" diametrically to be exact. For those not familiar with those types of sizes, that is about 1/3 the thickness of a sheet of paper. We made a handful of prototypes with this same x ring tolerance and sent them out all over the world to be tested by husky riders. We tried to target hardcore racers the most as they are more abusive on things, but we also sent a handful out to just regular Sunday riders. Not one report of leaky pistons came back during the testing phase so we went into production with those tolerances. A few months after this first run of pistons went on sale we began to get a few reports of pistons not sealing properly. The number of reports we got gave us a failure rate of about 3.7%. All the pistons from the first run were sold by February 2010. In every single case of a leaky piston we received, the piston was replaced with a 2nd gen piston absolutely free, or the customers money was refunded. I have even sent out free replacement pistons to people who didn't even buy from us. They were bought through a dealership. In the 4 production runs of pistons I have made a total of 2 refunds, and will apparently will soon be making a 3rd.
So to summarize, the first run of pistons made before August 2009 and sold before February 2010 had scattered reports of leakage. The design was modified in February 2010 and all subsequent runs of piston have used this tolerance. I have never, nor will I ever sell a product I know or suspect to be defective. It absolutely disgusts me that I have to write this. I have worked extremely hard over the last 4 years to build 7602 from the ground up into what it is today. I treat customer support and satisfaction extremely seriously. I thought that level of dedication and commitment was apparent to everyone who has dealt with me personally, but I guess it still needs to be stated. I have always and will always do whatever I can to make a customer happy with his/her experience with 7602. If anyone out there in internetland has a question/problem/comment about any of our products my contact info is listed below.
Now, to Evoxbobby specifically. If you haven't already given up and parted out your bike there is one last thing you might check. The crankcase breather hose leading from the top right side of the valve cover to the air box has been known to cause clutch loss. Check this hose and make sure it isn't blocked, pinched, or melted closed. An obstruction of this hose can lead to a buildup of pressure in the crankcase and this can cause the clutch to malfunction. Good luck.
And to clarify, who ever it was that you called and talked to at 11 and told you to go F yourself, it wasn't here. The last time we spoke was on 12/02. You are confusing us with someone else.
Clay Hamilton
Owner 7602 Racing
PO box 143
La Jara, CO 81140
719-274-0606
info@7602racing.com
XLEnduroMan
Heroes Ride Huskys. The others follow.
We have two 7602 clutch slave pistons in two stock Husky slaves. Pistons bought around Christmas '09. No problems ever. Would not hesitate to purchase again. Need the 7602 rad guards next. 
flipsidenv
Husqvarna
C Class
Bringing to life an old thread instead of starting another. I guess I spoke to soon earlier in this thread. My clutch set up has failed. Road 2 weeks ago and didn't notice anything wrong with the clutch. Today I was preparing the bike for a ride tomorrow and when I went to pull the clutch for a start there was no resistance. Popped the top on the master and it was empty which means all the fluid leaked by the slave piston while sitting for two weeks because it's not on the exterior of the bike. For a refresher I have a Zipty slave cylinder and 7602 piston. The seal ring is the same one that came from 7602. I wanted to replace it with the x-ring that everyone has been talking about but am confused. Where can I get it from because varies searches have not worked. Also what is the difference between the o-ring and x-ring.
XLEnduroMan
Heroes Ride Huskys. The others follow.
George Erl/Up-Tite is the man for the x-ring. When our '08's were new I got 2 of them from MotoXotica as they had them in stock.
flipsidenv
Husqvarna
C Class
You're awesome!! Thanks!