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2020 yeti 129 best gearing

K
Sep 21, 2016
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21
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I running a 20 129 yeti on a 18 husky 490 and have been running a 14 tooth countershaft sprocket and stock on the belt drive. Curious what you guys have done with gearing that is best for the deep. Current setup runs good when it’s setup a little
 

byeatts

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Nov 29, 2007
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I running a 20 129 yeti on a 18 husky 490 and have been running a 14 tooth countershaft sprocket and stock on the belt drive. Curious what you guys have done with gearing that is best for the deep. Current setup runs good when it’s setup a little
what elevation do you ride
 

byeatts

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Premium Member
Nov 29, 2007
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Run 14 counter sprocket and a 44 top belt gear, that's a finale 1.21 ratio ,This will make 1 st 32 MPH and the money climbing gear, On most kits 1st is useless , It will also give a full overdrive gear 50 mph down the trail allowing for all 5 gears useable. Its a better gearing than adding a 6th to gearbox. This is good up to 6500 feet . I set every bike here up this way and it rocks, for guys riding high elevations reach out to Tobe Till, He has suggestions for those elevations running far less HP at altitude .
 
Last edited:
K
Sep 21, 2016
67
21
8
34
Run 14 counter sprocket and a 44 top belt gear, that's a finale 1.21 ratio ,This will make 1 st 32 MPH and the money climbing gear, On most kits 1st is useless , It will also give a full overdrive gear 50 mph down the trail allowing for all 5 gears useable. Its a better gearing than adding a 6th to gearbox. This is good up to 6500 feet . I set every bike here up this way and it rocks, for guys riding high elevations reach out to Tobe Till, He has suggestions for those elevations running far less HP at altitude .
Have you tried 39 on the top. Really just looking for a little extra pull in 2nd gear when it’s super deep
 

Yeti854

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Nov 2, 2019
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i like 39 for the really super tight woods so it will really rip and you dont have to slip clutch too bad.
I ride husky and ktm 450's. THe bikes rev to the moon in first.
 

byeatts

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Nov 29, 2007
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39 top gear (1.37 ratio) renders 1st gear even more useless and top speed lame , You only really get 4 usable gears
 
S
Sep 4, 2021
29
14
3
utah
I like stock belt and stock 13 tooth counter. 9k elevation in video. pulls 2nd on every hill. 1st is an oh **** gear and very tight woods. and 5th still takes me over 50 mph.
 

byeatts

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Nov 29, 2007
3,402
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I like stock belt and stock 13 tooth counter. 9k elevation in video. pulls 2nd on every hill. 1st is an oh **** gear and very tight woods. and 5th still takes me over 50 mph.

You will not get 50 mph with a 13 gear. I gear up so my 1st is same as most 2nd gears and it does 50.
 
S
Sep 4, 2021
29
14
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utah
With my 2014 YZ450 and my Riot kit stock gearing I could hit 52 mph on gps. The yz is higher geared but so is the yeti kit. Ill have to get a gps of it.
 
S
Sep 4, 2021
29
14
3
utah
Doing the math I got 53.3343 mph at 11,500 rpm from final drive. on a 2021 ktm with a yeti kit.

Primary ratio 31:76 > 5th ratio 22:26 = .3451416 ktm countershaft rpm
kit ratio 13>16 > 41>47 = .70878 rpm

.24462946 Complete bike ratio

11500 x .24462946 = 2813.2388 rpms

2813.2388 x 20.02 inches (driver size) = 56321.041 inches per minute

56321.041/ inches in a mile 63360 = .888905 miles per minute

x60 to = per hour from minute. = 53.334 MPH


my bike revs to 11950 aswell. so


This gives me first gear of 31.51 mph. at 11500.
 
Last edited:

byeatts

Well-known member
Premium Member
Nov 29, 2007
3,402
1,215
113
Doing the math I got 53.3343 mph at 11,500 rpm from final drive. on a 2021 ktm with a yeti kit.

Primary ratio 31:76 > 5th ratio 22:26 = .3451416 ktm countershaft rpm
kit ratio 13>16 > 41>47 = .70878 rpm

.24462946 Complete bike ratio

11500 x .24462946 = 2813.2388 rpms

2813.2388 x 20.02 inches (driver size) = 56321.041 inches per minute

56321.041/ inches in a mile 63360 = .888905 miles per minute

x60 to = per hour from minute. = 53.334 MPH


my bike revs to 11950 aswell. so


This gives me first gear of 31.51 mph. at 11500.
you wont spin 11,500. Simply use the GPS MPH and get a realization of what ewer really running, on flat trail WOT.With 14 counter sprocket and a top 44 tooth it will only do 50 ish, the freeride has a 16 tooth jackshaft gear ,So ewers will not magically do the same with Much lower gearing.
 

Yeti854

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Nov 2, 2019
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I don't care what ratio you run. 39 top gear and a 6th gear i will beat you to the top of the hill. PERIOD
 
S
Sep 4, 2021
29
14
3
utah
you wont spin 11,500. Simply use the GPS MPH and get a realization of what ewer really running, on flat trail WOT.With 14 counter sprocket and a top 44 tooth it will only do 50 ish, the freeride has a 16 tooth jackshaft gear ,So ewers will not magically do the same with Much lower gearing.




Yes I will. I can hit rev limiter if i hold it no problem. Not all bikes are equal.
 
S
Sep 4, 2021
29
14
3
utah
I don't care what ratio you run. 39 top gear and a 6th gear i will beat you to the top of the hill. PERIOD



The reason its faster then 53.4 mph is because that is based off the driver size alone and not adding the thickness of the track or the paddles. So i can hit 60 on gps.

Ill take that challenge
 
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