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gearing for 2003 500 XCSP stretched to 136"

Polaris General Discussion

 
 
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  #1  
Old 09-14-2011
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2005 700 XCSP,2008 700 Dragon Switchback
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Default gearing for 2003 500 XCSP stretched to 136"

So I bought a 136 x 1.25 ripsaw track at hay days and bought the tracks USA extension kit to upgrade a 2003 500 XCSP that has been ignored since the purchase of a 2008 IQ dragon. My question is what would be a good gear set up for the extended track? The stock gearing is 22/40. I was thinking 19/39....Now on the 2002 500 sks which was 136" the stock gearing was 18/41 according to the parts manual. Would this work? any input is appreciated.

Well I have been doing some research and found out I have a 74 pitch chain. Now do I have to use a gear ratio that uses a 74 pitch chain? for example my ratio now is 1.82 w/ a 74 pitch chain so to use the same chain I can go to 20/40 tooth gears w/ a gear ratio of 2.0. and 19/39 like I stated earlier would use a 72 pitch chain so I could not use that ratio with out replacing the chain? I wonder if the 2.0 would be good for the longer track?

Anybody

Gearing sucks.....I dont want to lose to much top end but would like to get the motor to not have to work harder to get the added mass moving.

Wheres Madcow when you need him?

I also need to gear the 700 which has a 76 pitch chain and geared stock 25/41.
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Old 09-14-2011
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Personally for a mix of off-trail riding and trail riding I really like being in the 1.95-2.05 range. If its going to see more trail than deep snow just drop a tooth on top and you'll still see plenty of speed.
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  #3  
Old 09-14-2011
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Do you have to replace the chain for diff. gear ratios?
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Old 09-14-2011
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Depends on what gearing you use. If you just drop a tooth on top you shouldn't need a new chain, it should work fine. Thats all I did to the Dragon was dropped a tooth on top because of the deeper lug.
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Old 09-14-2011
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I'm assuming you've found the gearing chart. If it says you need a lower pitch chain for the gear ratio you want to use.....you need a lower pitch chain. Pitch = # of links in the chain. Too many links and you'll have a sloppy chain that could slip off of the gears or worse, it could start grinding into your chaincase (seen both of these happen). Too tight and the chain will snap.
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Old 09-14-2011
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if you keep the same chain you should be able to go to a 21top sprocket or even a 21-42 gearing? the dealers have a chart to double check before you buy a sprocket. personally on a 500 i would go with the 2-1 ratio. on hard pack trail the sled wont lose any top end, but with the lower gearing the sled will run better off trail.
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Old 09-14-2011
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Quote:
Originally Posted by Madcow View Post
if you keep the same chain you should be able to go to a 21top sprocket or even a 21-42 gearing? the dealers have a chart to double check before you buy a sprocket. personally on a 500 i would go with the 2-1 ratio. on hard pack trail the sled wont lose any top end, but with the lower gearing the sled will run better off trail.
I was thinking of going 20/40 which drops 2 teeth on top and still leaves me w/ a 74 pitchand a ratio of 2.0, what do you think?

Than I was going to use the 22 t gear on the 700 which would make it 22/41 ratio would would still be a 76 pitch chain.
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Last edited by rock2324 : 09-14-2011 at 04:44 PM.
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  #8  
Old 09-14-2011
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that should work. 2 teeth on the top sprocket on the rpms that the 500 spins would be roughly 8-9 mph off top speed, but you are not reaching top speed anyhow.

but with that gearing you gain almost 20% more torque at the track. thats almost 20% less load on the belt and engine to get the sled moving!!
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aint no body ripin like me. M to the a-d-c-o-w. rock it hard for my fly ladies. I rock it yes in deed. homies still roll with me. money dont change me


nothing goes like 3 holes.

BRTECH HOODS
high performance engineering
aaen performance
millennium technologies
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