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Discussion Starter · #1 ·
any body have one? is a 23-40 gear ratio allowed in the Fuse chaincase?
 

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Originally posted by racerdave@Sep 5 2005, 11:11 AM
any body have one? is a 23-40 gear ratio allowed in the Fuse chaincase?
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Well, for a start you should get used to specifying, if it is an '05 IQ chaincase, or an '06 two stroke IQ chaincase, or an '06 four stroke IQ chaincase.

The '06 service manual has not yet been distributed.

The '05 Fusion and RMK (not the IQ Racer) have a 11.35" center distance chaincase. This is what the chart tells me for that chaincase.

24:41 = 1.71 ratio has 0.136 CD slack with a 94 chain
23:40 = 1.74 ratio It is too tight with a 92 chain, too loose with a 94.
24:42 = 1.75 ratio has 0.037 CD slack with a 94 chain
22:39 = 1.77 ratio has 0.136 CD slack with a 92 chain.

CD slack refers to the difference between the maximum chaincase Center Distance this sprocket/chain combination could fit, and the actual chaincase Center Distance of this snowmobile's chaincase. It assumes 0 deflection, which is not always possible.

The '04/'05 IQ racer had a 7.92" center distance chaincase. IF the '06 600 HO has the same chaincase...

24:41 = 1.71 ratio has slack with a 76 chain
23:40 = 1.74 ratio It is too tight with a 74 chain, too loose with a 76
24:42 = 1.75 ratio has slack with a 76 chain
22:39 = 1.77 ratio has slack with a 74 chain
 

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Discussion Starter · #4 ·
Originally posted by ExcursionPSD@Sep 5 2005, 11:21 PM
Well, for a start you should get used to specifying, if it is an '05 IQ chaincase, or an '06 two stroke IQ chaincase, or an '06 four stroke IQ chaincase.

The '06 service manual has not yet been distributed.

The '05 Fusion and RMK (not the IQ Racer) have a 11.35" center distance chaincase.  This is what the chart tells me for that chaincase.

24:41 = 1.71 ratio has 0.136 CD slack with a 94 chain
23:40 = 1.74 ratio  It is too tight with a 92 chain, too loose with a 94.
24:42 = 1.75 ratio  has 0.037 CD slack with a 94 chain
22:39 = 1.77 ratio has 0.136 CD slack with a 92 chain.

CD slack refers to the difference between the maximum chaincase Center Distance this sprocket/chain combination could fit, and the actual chaincase Center Distance of this snowmobile's chaincase.  It assumes 0 deflection, which is not always possible.

The '04/'05 IQ racer had a 7.92" center distance chaincase.  IF the '06 600 HO has the same chaincase...

24:41 = 1.71 ratio has slack with a 76 chain
23:40 = 1.74 ratio It is too tight with a 74 chain, too loose with a 76
24:42 = 1.75 ratio has slack with a 76 chain
22:39 = 1.77 ratio has slack with a 74 chain
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possible then a 23-40 with broken in 92 chain, May be ok?
 

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What center to center is on the 600 ho 11.35"? The 7.92" on the 440 iq is the same as the edge/pro x.
 

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Discussion Starter · #7 ·
Originally posted by nickels@Sep 6 2005, 08:17 AM
What's the stock gearing on your sled dave? Same as the older 600's?
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23-39, same as edge 600. 00 600 is 23-40

I'd like to have the Fuse around 1.75
 

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Discussion Starter · #8 ·
found out today the stock chain is a 76 pitch, on the 23-39 gears. sounds like it has the shorter case then
 

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Originally posted by racerdave@Sep 8 2005, 04:16 PM
found out today the stock chain is a 76 pitch, on the 23-39 gears. sounds like it has the shorter case then
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Hmmm I wonder what chaincase are in the 600's then? If it was the same cc as the edge with 23/39 you would use a 74p chain. If it was the 900 chaincase that would call for a 92p chain. What's the cc distance on the 600 ho's? :dunno:
 

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Discussion Starter · #10 ·
Originally posted by nickels@Sep 8 2005, 04:38 PM
Hmmm I wonder what chaincase are in the 600's then? If it was the same cc as the edge with 23/39 you would use a 74p chain. If it was the 900 chaincase that would call for a 92p chain. What's the cc distance on the 600 ho's?  :dunno:
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I didn't open it up yet. Thats from the spec page I reread today. I work Saturday, see The Stones sat night, and IRL Sunday, so I won't open it up till sometime next week.

Isn't the Pro-x case different? It does have the Phantom brake. No liquid cooled brake anymore.
 

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Originally posted by racerdave@Sep 8 2005, 04:51 PM
I didn't open it up yet. Thats from the spec page I reread today. I  work Saturday, see The Stones sat night, and IRL Sunday, so I won't open it up till sometime next week.

Isn't the Pro-x case different? It does have the Phantom brake. No liquid cooled brake anymore.
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The pro x is a 7.92 same as the edge. I'll try and find out at haydays what they have.
 

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They lowered the jackshaft 3" in the 06's, so it's pretty much a certainty that the 06 will have a different chaincase with a shorter centre-to-centre than the 05...unless they lowered the driveshaft 3" too! (the last part is a joke, before eveyone starts posting the reasons why they couldn't lower the driveshaft 3 inches!).

So, no point in looking at 05 numbers to plan 06 mods...personally I wouldn't be thinking about mods until I have tried out the 06 and determined what (if anything) might need to be done...the 06's better be pretty damn good right out of the box, and if it's not, better look into Arctic Cat or Ski-Doo or Yamaha gears, 'cause that's what we'll all be riding next year!!!
 

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Discussion Starter · #13 ·
Originally posted by RedFusion900@Sep 9 2005, 02:29 PM
They lowered the jackshaft 3" in the 06's, so it's pretty much a certainty that the 06 will have a different chaincase with a shorter centre-to-centre than the 05...unless they lowered the driveshaft 3" too!  (the last part is a joke, before eveyone starts posting the reasons why they couldn't lower the driveshaft 3 inches!).

So, no point in looking at 05 numbers to plan 06 mods...personally I wouldn't be thinking about mods until I have tried out the 06 and determined what (if anything) might need to be done...the 06's better be pretty damn good right out of the box, and if it's not, better look into Arctic Cat or Ski-Doo or Yamaha gears, 'cause that's what we'll all be riding next year!!!
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Remember we're talking about a Poo. There's always room for improvement
 

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I found out today the 2006 IQ two stroke chaincase is an 8.373 CD

This is new for Polaris, I do NOT have a chaincase/gearing chart for it.

SORRY!


It should be extremely close to the 2005 900 chaincase/gearing chart with 16 fewer links in the chain, but it depends somewhat on exactly how the adjuster is setup in the new chaincase with the sight gauge on the cover.

8 links x 3/8" per link = 3" which is the approximate difference in Center Distance.

Then double it because it goes up and down the chaincase.

2 x 8 links = 16 links
 
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