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Discussion Starter · #1 ·
I want to change my gearing from what i believe is a 21-39 to 20-39. My sled is clutched and studded. What all is involved in changing gears and where can i find a top gear for this motor?
 

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With that change, you won't have to get a shorter change. All you need is the 20 tooth gear and fresh chaincase oil.
Find the gear on craigslist or ebay.
 

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Discussion Starter · #3 ·
So exactly what type of gear should i be looking for? Would i need a 13mm width or a .75in width?
 

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Stock your sled came with 20-39 gearing, so before you buy make sure you are positive what gears you have. Also, You have the 11W gears. 11W means your chain is 11 links wide, 13W means 13 links wide, not 13mm wide. 3/4" wide gears are for the HYVO system, which you do not have.
 

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Discussion Starter · #6 ·
Ok thanks for that but someone else told me that I have a 21 tooth top gear so does anyone have the actual specs for this sled?
 

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My mistake, I was looking up specs for a '97 XCF. The '97 SuperSport does indeed have a 21T stock, still uses 11W gears though.
But are you sure you have a 1997? Your hood and nosecone are that of the 1998 Supersport. You need to know because the '98 uses the HYVO system, in which case it has 22/41 gears stock.
If the manufactured date on your tunnel is in 1997, you have a 1998 Supersport.
 

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Discussion Starter · #8 ·
Well then I have a '98. The manufacture date on it is in june of '97 so yeah I assume it was sold as a '98 model, my bad. What would be the best change for me now since its a '98?
 

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Your current ratio is 1.86 with the 22/41 and 68 pitch chain
You could go to 21/41 for 1.95, or go to a 66 pitch for 20/39 (also 1.95) or 19/39 and the 66P chain (2.05). It is not recommended to go to 20/41. Since you have studs, you could pull off the 19/39. But, that means you need a different chain and both gears, which is also a pricey route.

On my sled I don't have studs, so I went from 22/41 to 21/41 and it pulls pretty hard and gets to 70 quickly before the acceleration starts to taper off. Haven't topped it out yet, highest I've gotten so far is 85. With the 22 tooth I could get 92-98 on the speedo depending on ambient temperature.
 

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Discussion Starter · #11 ·
It sounds like the cheapest and best option for me would be the 21-41. Does that sound like a good setup??
 

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Go for it, 1.95 is a good ratio
 

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Discussion Starter · #15 ·
Also would i need a different chain for just the 21-41? What exactly would i need to do this swap?
 

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Just the gear, you can use your existing chain. Good luck finding a 21 tooth Hyvo, they are somewhat hard to come by.

jtb0322 said:
What area of rpms would i be turning with the 1.95 ratio??
That depends on your clutching.
 

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Discussion Starter · #17 ·
Would this work?? http://www.denniskirk.com/jsp/tpl/product.jsp?store=Main&catId=309&leafCatId=30903&skuId=11004521&productId=p11004518&mmyId=
 

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Yeah that will work. Wish I had seen this when I was looking for mine, I ended up getting a used gear that has some wear for only a little bit cheaper than that new one.
 

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Discussion Starter · #19 ·
Haha well i just came across it when i was looking so i think this will pull pretty hard with the picks also?

Any comments??
 
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