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July 21st, 2012, 02:45 AM   #1
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I want to try a Kush (cush) sprocket on FE450.

I've seen a couple of links to these new fangled Kush sprockets. Basically they claim to do the same as a cush drive and it's a helluva lot cheaper at about $100.

"........outer ring which is dampened from the inside plate by a set of polyurethane dampeners....."

Maybe I'll get a slightly smaller rear "Kush" sprocket just for those rides that require a few transport miles?

What I want to know is if anyone has tried them. I've never seen them for real. I read somewhere they had some early problems, but it is all sorted now. I'm thinking if it works it might be the magic answer.....to the $1000 cush hub problem. (Problem being too many $$)

The other thing is: We never cush drives etc on out bikes in the 80's and 90's, what's the go here? Are we being told we need things we don't?

I'd like to do a few miles on bitumen here & there on my 450, but the fear mongers have be worried about the gearbox.


Here's a link. I'll try to drop in a photo here if I can.

https://kushsprockets.3dcartstores.com/ ... _p_69.html
and here's the FAQ which I found interesting:
https://kushsprockets.3dcartstores.com/FAQ_ep_43.html[attachment=1:3ab4vl5w]pic02.jpg[/attachment:3ab4vl5w][attachment=0:3ab4vl5w]kushanim43345 (1).gif[/attachment:3ab4vl5w]
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I want to try a Kush (cush) sprocket on FE450.-pic02.jpg   I want to try a Kush (cush) sprocket on FE450.-kushanim43345-1-.gif  
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July 21st, 2012, 02:50 AM   #2
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Re: I want to try a Kush (cush) sprocket on FE450.

I'm on the waiting list for one at the moment as they currently don't have any. I don't think a cush drive is essential as some prefer the direct feel without it, if you couldn't do bitumen miles without one then they would have come out with a cush hub standard. I ride my 650 daily to work, so I'd prefer to make it a little smoother and easier on the drivetrain. Apparently they had some teething issues with the first batch and the rubber wasn't bonding properly, but this 2nd design is supposed to have fixed all the problems. For 100 a sprocket with a lifetime warranty, I'm more then keen to see how they go as soon as they can send me one.
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July 21st, 2012, 01:22 PM   #3
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Re: I want to try a Kush (cush) sprocket on FE450.

yep, be interesting to see how the updated kush sprockets work out. i can't help feeling the first time you get the rear wheel buried in a mud hole that it the ooze will seep in through the gaps and bugger it up? or even just dust doing the same thing over time? unless they have some really good seals in there somehow?

on the eternal cush drive hub debate, its true they were very rare on older bikes, but they usually had much beefier gearboxes back then. everything is pared back as much as possible on the performance bikes nowadays so a cush drive hub probably isn't a bad idea if you are doing a lot of road miles, at least on a bigger bikes. husaberg put a cush drive hub on the FS570 tard but not the FE570 for example.

here's an argument against cush drive hubs.
http://motostrano.blogspot.com.au/20...to-wheels.html

here's one supporting their use, at least under certain conditions.
http://motard-supermoto-wheels.sport...-supermoto.htm
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July 23rd, 2012, 02:40 PM   #4
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Re: I want to try a Kush (cush) sprocket on FE450.

Originally Posted by hoosie5seventy
yep, be interesting to see how the updated kush sprockets work out. i can't help feeling the first time you get the rear wheel buried in a mud hole that it the ooze will seep in through the gaps and bugger it up? or even just dust doing the same thing over time? unless they have some really good seals in there somehow?
...................
Yep, that's what I was thinking. Dirty places, back wheels.
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December 11th, 2016, 10:01 PM   #5
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So for those that don't know Kush sprockets are no longer trading after their first and 2nd run of sprocket literally blew up with in the first rides for some.
But kiwi company Motomox had bee developing a crush sprocket of the past several years, the final product has been in test for over a year now and was released for sale earlier this month. They tested then in hard endures thought to heavery loaded adventure bikes. And are believed to be bomb proof. motomox sells replacement urethane bushes but the replacement period is still unknown as the are providing to very hard wearing. There are many numbered chain rings available and they are interchangeable so you can tune your ratios to your needs in any specific environment your riding. They New Zealand designed and made by a New Zealand owned company so not a 3world sweet shop, and are made with a high level of quality control. So if your serious about saving wear to your tyres and drive chain, and remove chain slap for a smother less viby ride have a look at the Moxsprock on motomoxs web site. motomox.co.nz
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Last edited by NZ FE; December 11th, 2016 at 10:19 PM.
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December 12th, 2016, 06:11 AM   #6
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I had one of the 2ond gen Kush sprockets on my dualsported FX450. I could not really feel a difference w/ it on, but it worked and seemed to wear well. Then I had a wheel bearing go bad. I think the resulting lateral play put sideloads on the sprocket. The rubber inserts broke apart. I really don't know that the bad wheel bearings did in the sprocket, maybe it was the other way around?
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December 13th, 2016, 02:46 PM   #7
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The Lush sprockets offered free servicing or replacemt lifetime warranty can't help but wonder if this was a factor in their company going bust and to stop trading. The kiwi made Moxsprocket has been extensively tested, under very hard conditions from hard endures to heavily loaded adventure bikes.
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December 14th, 2016, 02:51 AM   #8
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the kush sprockets relied on glue to stop the rubbers falling out

it was never going to work, i killed one in 5 minutes
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August 5th, 2017, 04:53 PM   #9
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Originally Posted by bushmechanic View Post
the kush sprockets relied on glue to stop the rubbers falling out

it was never going to work, i killed one in 5 minutes
No glue in the MotoMox product MoxSprocket. If my bottom end hadn't got I would have already fitted a MoxSprocket to my FE
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