primary shim. mph loss? - Page 3 - Yamaha Rhino Forum - Rhino Forums.net
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post #31 of 46 (permalink) Old 05-15-2010, 06:54 PM
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I currently run on my 450 three .5mm shims, (1.5mm total) with 14 gram grease-less weights and no dust cover. I'm just waiting on the grease-less sliders to come out for it. I've modified my cam plate though to make up for the shim.
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post #32 of 46 (permalink) Old 05-15-2010, 07:45 PM
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tim we got the grease less sliders for the 450 & 660 in today... =]

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post #33 of 46 (permalink) Old 05-16-2010, 05:37 PM
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Yeah baby on my way to your sight now, thanks!
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post #34 of 46 (permalink) Old 05-16-2010, 05:59 PM
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tim,

i wont have them added to the website until tomorrow. sorry...

ill pm you or call when theyre up, or if you want, i can just ship a set to you?

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post #35 of 46 (permalink) Old 05-16-2010, 06:35 PM
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Tomorrows fine. I've waited this long.
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post #36 of 46 (permalink) Old 05-20-2010, 10:50 AM Thread Starter
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well, a little late but i have the rhino tore apart today. heres some pictures of what the primary looks like with and without the shim. what do you think? enough spline sticking out? this is with the OD weights that have been shaved. fyi, my 18 gram weights after a little trim were around 17.5 grams. johnny, how do the splines look compared to the weights that have not been trimmed?

WITH SHIM



WITHOUT SHIM
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post #37 of 46 (permalink) Old 05-20-2010, 01:52 PM
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now determine if the outside washer will cover the splines and the nut hold it (assembly) tight.



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post #38 of 46 (permalink) Old 05-20-2010, 02:00 PM Thread Starter
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Washer covers the splines and then some. I probably could go with a thinner washer there....it appears as I just barely have a full nut on the threads, but I think I should be OK. Think it will be good to go? I changed to a gold secondary spring, slapped it all back together and checked top speed, Rev limiter kicks in between 47-48. Before gold spring and shim it was 49-50.
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post #39 of 46 (permalink) Old 05-20-2010, 03:21 PM
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you will get more mph with a lighter secondary spring, but give up some climbing speed.



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post #40 of 46 (permalink) Old 05-20-2010, 03:37 PM
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looks great to me ... with the shim

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post #41 of 46 (permalink) Old 05-20-2010, 04:38 PM Thread Starter
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Quote:
Originally Posted by 07fj View Post
you will get more mph with a lighter secondary spring, but give up some climbing speed.
Yea, I'm not sure if the loss is from the spring or spacer. I thought of trying each one separately, but I was in a hurry to get it back together. I need some seat time to see if I like the spring or not. I also have some 20 gram weights to play with. Problem is, I spend more time wrenching than I do riding, and days off are limited!

Enough spline Johnny? Do you install thinner washers to get a little more thread through the nut or just leave them alone?
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post #42 of 46 (permalink) Old 05-20-2010, 05:56 PM
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no thinner washer everything looks good

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post #43 of 46 (permalink) Old 05-20-2010, 06:16 PM
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On the grizz they are machining the ramps on the primary sheave deeper towards the centre to simulate a 2mm of shim, and then add a 1mm shim between the primarys. This gives you about 30% lower starting. It costs you a few MPH, but they they mod the fixed plate to get it back, and maybe a MPH more. I assume if you conintued to machine the ramps further, or used OD weights you would get more on top to compensate for the lower gearing.

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post #44 of 46 (permalink) Old 05-20-2010, 07:39 PM Thread Starter
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Hmm, damn, does the inside of the belt rub the shaft? Didn't seem like there was much more room there. Think the belt would ride too far up in the secondary and rub the housing. When you say fixed plate, you talking about the outside part of the sheave where the rollers push?
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post #45 of 46 (permalink) Old 05-21-2010, 12:45 PM Thread Starter
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well, i got to do a little test run this afternoon with the gold spring. first impressions is that i increased the rpms by a significant amount, maybe too much for daily trail riding, however, i think it would be nice in the mud and sand, especially with a passenger. i got the rev limiter to kick in at around 40-42 by booting it down from a rolling start, but i could not duplicate it again, so it may be a fluke. i really need to get a tach on the dash to see whats going on a little better (again, i wish i knew where peak HP was being made). the backshift is a noticeable amount more aggressive, which i expected.

so, i think there is room for a bit of improvement, i think the 17.5 grams may be a bit too light for the gold spring, and my tire/weight setup. i have a set of 20 gram od's that i might shave and toss in, but i think that might be too heavy. maybe a mixture of the 18s and 20s would be the ticket, but i am unsure how it would affect slider wear. i could also go down to a tad softer spring, or say screw it and stick with the stock orange stripe.
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