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Track Speed - Change Gears or Drivers? started by leallan
September 3rd 2008 at 11:17 PM
 
leallan
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Member Since: January 8th 2006
Location: Lake Fork, Idaho, USA
Current Sled: Polaris SKS & RMK 800 151
2008-2009 Miles: 2425
 
 
Looking for a little input on increasing the track speed on my 02 RMK 800 151. After breaking my drive axle, I was looking at getting NO Slip drivers for the replacement, and was wondering if going with a smaller driver would be better than re-gearing the chain case. Or should I do both?
Also, I was thinking of possibly changing the track and drivers to a 3.0 with a Maverick 153 track to save some weight. Has anyone done this conversion?

Thanks



Take Care,
Leallan

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September 9th 2008 at 10:00 AM
 
ProjectRMK
...now rides a M1000
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Going to smaller drivers will DECREASE your track speed if you are looking for all out top speed performance. Smaller drivers, however, will allow you to hold a more constant track speed while climbing. It's vuage what you are looking for; consistence or top speed. Larger drivers, especially with extroverts probably won't fit in your tunnel and will make the track rub on the front, as well as possibly requiring a rail trim.

Your best bet and easiest to deal with are to go to taller gears if you are looking for top speed, or shorter gears if you are looking for consistent track speed while climbing.



Boise, Idaho
USA

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September 9th 2008 at 11:20 AM  [ Modified September 9th 2008 at 11:21 AM ]
 
Student Driver
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Smaller drivers will make almost a 10% decrease in gearing.
This is a HUGE drop and wouldn't be in your best interest.
I'd actually drop just 1 tooth on your top gear from stock and either run 4 drivers, or anti ratchet drivers.
This will give you a little less actual top speed,
but it will hold it's max track speed much better and longer than stock and work better for off trail mountain riding.
Clutching and gearing are everything.
What springs, weights, and helix are you running?



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September 10th 2008 at 2:24 AM
 
leallan
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Member Since: January 8th 2006
Location: Lake Fork, Idaho, USA
Current Sled: Polaris SKS & RMK 800 151
2008-2009 Miles: 2425
 
 
Thanks Guys,
I looking for more quickness and consistence speed for boondocking and climbing. I have an SLP Power shift clutch kit(Installed before I bought it) with stock gearing.
Stock driver (2.52) 9 tooth has a circumference of approx 22". Going to a 3.0 driver a 7 tooth circumference is 21". With the extra paddle height of the 153 track. it should fit fine for tunnel clearance. Then drop 1 tooth on the top gear in the chain case.

Thanks for the input.......



Take Care,
Leallan

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September 12th 2008 at 2:16 PM
 
ProjectRMK
...now rides a M1000
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I think you are on the right track. No pun intended....



Boise, Idaho
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September 15th 2008 at 7:33 PM
 
2000TCMC
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I did a similar conversion on my Tcat went to 7T 3.0 and Went to 20/42 stock was 20/39.
Not as much top end but I can still hit 100 on the lake at full shift out, but it pulls like no other on the bottom end.
I went to the 7 tooth 3.0 Pitch because of the slightly smaller diameter gave me clearance for the 2.25 track.
It works great for climbing and boondocking. You will probably need to modify your clutching a little or it may over rev since you will be geared down.




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September 16th 2008 at 8:04 AM
 
Student Driver
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^^^
Heavier weight normally fixes that.



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