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 JBS Sheave compared to the Whiterhino cut sheave on the 450 rhino..

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Mud-and-Guts
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PostSubject: JBS Sheave compared to the Whiterhino cut sheave on the 450 rhino..   Sat Dec 31, 2011 6:05 pm

Shortly after getting my bike I ordered the whiterhino cut sheave with 12 gram rollers and was really impressed but keep my stock sheave just in case. After seeing everyone with such good luck with James sheaves and the greaseless weights I decided it was time for a change. With over 2000 miles on my currant setup I sent James my stock sheave and told him I wanted everything I needed with his cut, a new cam plate, and the greaseless sliders. I got out today and did a few runs before changing the sheave's and then a few after to see just how they compared in a drag race setup and the JBS sheave came out on top every-time. There wasn't a huge difference but it was noticeable.. The big gain was in performance just off idle, the rhino has a lot more wheel spin than it did with the whiterhino cut sheave, it actually feels like the belt is slipping just off idle because the rpms jump so fast.

I will elaborate a little more later but here is a little video... This video is not the best but it will give you an idea..


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PostSubject: Re: JBS Sheave compared to the Whiterhino cut sheave on the 450 rhino..   Sun Jan 01, 2012 1:08 am

What you gonna do with that Whiterhino sheave that you took out?
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PostSubject: Re: JBS Sheave compared to the Whiterhino cut sheave on the 450 rhino..   Sun Jan 01, 2012 7:35 am

woooohooooo...under 15mph is the biggest improvement over other sheaves with no roller flop on top end...thanks
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PostSubject: Re: JBS Sheave compared to the Whiterhino cut sheave on the 450 rhino..   Sun Jan 01, 2012 9:54 am

Not sure yet, I did find two holes in my belt cover due to the old sheave letting the belt run so high in the secondary.

dcfox wrote:
What you gonna do with that Whiterhino sheave that you took out?


WV Hot Rod Rhino wrote:
woooohooooo...under 15mph is the biggest improvement over other sheaves with no roller flop on top end...thanks

When I found the two holes in the belt cover I expected the JBS sheave to lag behind on take off but the JBS sheave actually does better, even has more wheel spin. You can feel a big difference down low but in the video you can't see it, in the video on the road there isn't much difference in speed gain down low but your sheave pulls better on top.

Makes me curious have you ever tried a shim with one of your sheaves? You got me wanting more....lol Maybe about time for a cam...

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PostSubject: Re: JBS Sheave compared to the Whiterhino cut sheave on the 450 rhino..   Sun Jan 01, 2012 10:41 am

I'd love an upgrade but not at the cost of holes in the belt cover.I go deep too much to have that.
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PostSubject: Re: JBS Sheave compared to the Whiterhino cut sheave on the 450 rhino..   Sun Jan 01, 2012 10:59 am

dcfox wrote:
I'd love an upgrade but not at the cost of holes in the belt cover.I go deep too much to have that.


The white rhino cut sheave came with a shim to allow the belt to drop lower in the primary and ride higher in the secondary. With out the shim you would lose some performance but shouldn't rub the belt cover. James sheave doesn't use a shim and performs better. If you still have a stock sheave the gains would be significant, dollar for dollar best mod you can do to the 450!

The sheave and weights change the gearing and stall speed to get the motor in its powerband. I cannot wait to go on a long trail ride and really try this setup out.

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PostSubject: Re: JBS Sheave compared to the Whiterhino cut sheave on the 450 rhino..   Sun Jan 01, 2012 2:02 pm

Ok...that being said...what would it take to get that Whiterhino sheave from you?
And...when you swapped to the JBS did you swap weights or use the same ones that you had with the Whiterhino sheave?
What I'm asking is...would your Whiterhino sheave have weights with it or would I need to buy those separately?

And yes...my clutching is all stock right now but I do have a blue spring and 14g weights sitting on the work bench.
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PostSubject: Re: JBS Sheave compared to the Whiterhino cut sheave on the 450 rhino..   Sun Jan 01, 2012 3:19 pm

dcfox wrote:
Ok...that being said...what would it take to get that Whiterhino sheave from you?
And...when you swapped to the JBS did you swap weights or use the same ones that you had with the Whiterhino sheave?
What I'm asking is...would your Whiterhino sheave have weights with it or would I need to buy those separately?

And yes...my clutching is all stock right now but I do have a blue spring and 14g weights sitting on the work bench.

Right now i would rather hang onto the whiterhino cut, in the future I may try to smooth out the roller flop and try it with the 10 gram weights to see how they compare. I may also try it with out the shim to see how it compares to the JBS sheave.

As for weights stock on the 450 is 14 (+2 gram covers) so if you have 14's on the shelf it should be the same as whats in your bike, I would recommend atleast dropping to 12's and maybe 10's.

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PostSubject: Re: JBS Sheave compared to the Whiterhino cut sheave on the 450 rhino..   Sun Jan 01, 2012 6:07 pm

I misstyped...the ones i have on the shelf are 12s
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PostSubject: Re: JBS Sheave compared to the Whiterhino cut sheave on the 450 rhino..   Mon Jan 02, 2012 7:28 am

with a shim you loose some belt bite..we milled ours so you dont need a shim to get the low gear..

dc i can mill your stock sheave for you
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PostSubject: Re: JBS Sheave compared to the Whiterhino cut sheave on the 450 rhino..   Mon Jan 02, 2012 7:38 am

when i search for the vid it says unlisted???????????
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PostSubject: Re: JBS Sheave compared to the Whiterhino cut sheave on the 450 rhino..   Mon Jan 02, 2012 7:56 am

WV Hot Rod Rhino wrote:
when i search for the vid it says unlisted???????????

Fixed its public now.

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PostSubject: Re: JBS Sheave compared to the Whiterhino cut sheave on the 450 rhino..   Mon Jan 02, 2012 7:44 pm

WV Hot Rod Rhino wrote:
with a shim you loose some belt bite..we milled ours so you dont need a shim to get the low gear..

dc i can mill your stock sheave for you

What kind of price we talking here and what turn around time?
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PostSubject: Re: JBS Sheave compared to the Whiterhino cut sheave on the 450 rhino..   Tue Jan 03, 2012 7:53 am

dcfox wrote:
WV Hot Rod Rhino wrote:
with a shim you loose some belt bite..we milled ours so you dont need a shim to get the low gear..

dc i can mill your stock sheave for you

What kind of price we talking here and what turn around time?

180.00 for the ODs, milling and shipping back to you..1 week
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PostSubject: Re: JBS Sheave compared to the Whiterhino cut sheave on the 450 rhino..   Tue Jan 03, 2012 6:33 pm

I am not at all happy with this video due to the shading so I mentioned to Brandon next weekend I was thinking about redoing it and we got to talking between the two of us we have a stock sheave, JBS sheave, a unleashed utv sheave, and the whiterhino sheave. If all goes well and the rain holds off next Saturday we have plans of cleaning them all up and then running them all one at a time in my bike to see which one we like best along with which one gives the best performance. I wish we had some 14 gram stock weights so I could do a test with basically a stock setup but we do not so I guess we will use the 12 grams in the stock sheave..


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JBS Sheave compared to the Whiterhino cut sheave on the 450 rhino..

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