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19/43 hows the top end on the 900rmk lossing 4t how much will this hurt the top end will it bring up my rpm? 900 rmk 151 2.4track I run 7550 on the rpm now
19/43 gering hows the top end
- Thread starter RMK900204
- Start date
B
19-39 stock gears at 7600rpm is 78.5 mph at 1:1 clutch ratio, 19/43 at 7600rpm is 70.4 mph from the polaris gearing chart.
I
I have 19/43 on my 800 with a 136, it's good for 76MPH at 8000ish. I love low gearing, cheapest/most effective mod for deep snow performance
T
Way to low, unless you race snowX or just jump,imo. One thing I learned from alot of racing hillclimbs is if your ratio is to low and your clutching is off, you will lose too much track speed. A little higher ratio is more forgiving when it comes to track speed. I always ran a 19/41 set(2:15) with a 151 and it worked great. I ran that with a 121" also.
RMK900204, What elevation do you ride at? I rode at 9000ft once with a piped 800 and had 2:15 ratio.
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Negative ghost rider.
Lower gearing helps maintain track speed. My sled will never pull 75MPH up hill in powder...not enough ponies under the hood. Why do I need a higher potential MPH if I can't achieve my current one?
Racing hill climbs is different than climbing in the backcountry, hardpack/vs powder, etc. And besides, my clutching isn't off.
If you're still not convinced, these are the combinations I tried first...
24/41
22/41
19/39
And my sled now goes the highest on the hill with 19/43. Proof enough for me.
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I also agree that lower gearing is not going to have a negative effect on track speed. You don't have enough HP to pull 70mph on the hill, so even though you are geared down a little, you are going to make it up with the clutches pulling more speed anyway.
IN *theory* gearing should have little to do with track speed pulling a hill, unless you have monster HP or something....
For whatever you are geared at, the clutches should adjust for HP vs. track speed. But, lower gearing is where it's at as it gives lots of other benifets, including being easier on the belt and clutches pulling that hill.
IN *theory* gearing should have little to do with track speed pulling a hill, unless you have monster HP or something....
For whatever you are geared at, the clutches should adjust for HP vs. track speed. But, lower gearing is where it's at as it gives lots of other benifets, including being easier on the belt and clutches pulling that hill.
Negative ghost rider.
Lower gearing helps maintain track speed. My sled will never pull 75MPH up hill in powder...not enough ponies under the hood. BUT it COULD with my current gearing if I had the power. Why do I need a higher potential MPH if I can't achieve my current one? Just think, if I dremel out my chaincase just a wee bit I can stuff a 46 in it
I ride between 2-7K'. Cantwell or summit mostly, but look for me at a lost lake near you soon
Oh, and if you're still not convinced, These are the combinations I tried first...
24/41
22/41
19/39
And my sled now goes the highest on the hill with 19/43. Proof enough for me.
The purpose of gearing down is to make your clutching run more efficiently, Your previous gear combos are way......higher than what you run now.
If you lower your gearing a lot then you will need to change your clutching...
IE helix.
06 900 RMK 159 2.4 stock gearing is 20/41. I dropped the top gear to a 19 tooth and that made a positive difference.
You are also trying to acheive a 1:1 ratio from your primary(engine) revolutions to your secondary clutch when climbing at WOT......This will give you max H.P. to the track.
If you are achieving a 1:1 ratio at WOT then your belt has maximum contact on both clutches ....which will give you max belt life....low belt heat.
If you gear down too much then your belt is riding high in the primary and low in the secondary and not acheiving max. efficiency and H.P. to the track.
M
Gear for what your riding for.imo
trails-1.95
mix-2.10
climbing and boondocking-2.25
I personally have not a clue how fast my sled will go, however I know I can climb numerous times without belt heat and boondock without burning belts up.
800 poo 153-2.25" 19-43 gears 7 tooth drivers avids.
trails-1.95
mix-2.10
climbing and boondocking-2.25
I personally have not a clue how fast my sled will go, however I know I can climb numerous times without belt heat and boondock without burning belts up.
800 poo 153-2.25" 19-43 gears 7 tooth drivers avids.
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ratio is 2.26 with 19 43
I have ok hp 168 hp 204hp on the button the dino me in utah last year thees was 2000 ft lower than I ride. thees are the average hp out of 5 runs off the buttom and 5 runs on the button .my problem is gitting out of the hole I ride 8000 to 10000 and every now and then up by 11000ft .I can run just about any one down as long as the hill is long enouf
I have ok hp 168 hp 204hp on the button the dino me in utah last year thees was 2000 ft lower than I ride. thees are the average hp out of 5 runs off the buttom and 5 runs on the button .my problem is gitting out of the hole I ride 8000 to 10000 and every now and then up by 11000ft .I can run just about any one down as long as the hill is long enouf
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Where is the best place (online) to buy new gears... I'm looking for an 18t drive gear to go with my new 41t driven gear. Which will change my ratio from 2.16:1 to 2.28:1, and allow me to keep my current chain. All of the places I've found sell 19t and 20t driven gears as their smallest gears.
Thanks for any help.
T
Thanks for any help.
T
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team cluching/racing on line
royal distributing in ontario. you can order on line or phone and they will mail the gear to you.
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i did 18-40 on my 05 900 166 and it woke it up big time and i can still run 85-90 on the trails if i want , but i ussually run 70
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be carful with the 18 tooth drive gear they will break then you will have lots of trouble
X
A lot of guys say they have no troubles with the 18T top gear but when you look at one that is a nasty bend radius and less teeth in contact with the chain. I'm running 19/43 (2.26) right now and I'm thinking of going to 20/45 (2.25) just to make sure.
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Anyone run a 20/42? I looked at 20/43 but the 74 chain doesn't quite reach. Worried about breaking the 19t with the mod I'm building so I want to go to a 20T.
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1200 miles on 19T gear with 220 plus HP broke chain first
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I'm going to be more in the 350+ range. 1500cc 4 stroke turbo.
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I have a 2001 800 in my Pro X chassis and i am wonder if a 19t 43t gearing will be too low. I am running a 144 track. Sled will have slp single pipe and filters that is all the mods so far.
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