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Ski-Doo: REV Gen 4 For the 2017 and newer REV Gen 4 Sleds
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  #1  
Old 07-21-2018, 04:13 PM
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Dynamo^Joe Dynamo^Joe is offline
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Default 2019 G4 Summit clutch settings - Dynamo Joe

Sorry im a bit late. Usually have these stock clutch settings by 2nd week of June, but i've been out of town working on my garage pad.


FR 146, Summit 146 x 850
990 ramps low, 965 ramps high
bl / yl primary spring low, bl / pl high
38mm pivot to 4000
33mm pivot 4k~8k
26mm pivot 8k+
Black secondary spring to 4000 feet
Blue secondary spring 4000+
42/38 helix
21-49 @ 114p chain

FR 154~165, Summit 154~165
990 ramps low, 965 ramps high
bl / yl primary spring low, bl / pl high
38mm pivot to 4000
33mm pivot 4k~8k
26mm pivot 8k+
Black secondary spring to 4000 feet
Blue secondary spring 4000+
40 helix
FR (Euro) 154 @ 21-49 @ 114p chain
Summit 154 @ 21-51 @ 116p chain
165's @ 21-53 @ 116p chain


Summit 175 x 850
990 ramps low, 965 ramps high
bl / yl primary spring low, bl / pl high
38mm pivot to 4000
33mm pivot 4k~8k
26mm pivot 8k+
Black secondary spring to 4000 feet
Blue secondary spring 4000+
40 helix
21-53 @ 116p chain


Clutch kits that are really great; quick and easy to tune available - About 3mph more track speed, repeatable. Engine braking really really strong, declutching at a low track speed.

https://www.ibackshift.com/comersus/...?idCategory=14


850 Blog (My ramblings)
https://www.ibackshift.com/article/8...summit-196.asp


I think I get to put together a 2019-850 x 154 x 3.0 next week some time; and get my head in there to see what's new under the hood.
__________________

Really good G4-850 and XM summit clutch kits

850 G4 Summit clutch kit index

Online Gear Calculator @ iBackshift
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  #2  
Old 07-23-2018, 08:28 AM
el__gato el__gato is offline
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keep us posted on what you're seeing on the 2019
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Old 07-24-2018, 05:44 PM
Motorbreath_ Motorbreath_ is online now
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Pardon my ignorance, but do these set ups differ from previous years?
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Old 07-25-2018, 06:36 PM
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Only thing I see different is a lighter finish rate on the primary spring for the high altitude setup. It’s 50 lbs lighter than the 2018 models.
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Old 07-25-2018, 07:25 PM
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Not knocking this work, but is it really worth the extra $400 to upgrade a brand new sled?
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Old 07-25-2018, 09:31 PM
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Primary clutch springs
Bl/Yl = 150/250 lbs
BL/PL = 150/350 lbs (2019 H.E. Spring)
PL/PL = 170/350 lbs (2017 H.E. Spring)
PL/WH = 170/400 lbs (2018 H.E. Spring)

I was experimenting with some new parts I made for the primary clutch, causing lower engagement speed to 27~2800 rpms using 965 ramps (at low elevation) and I love it. 31~3200 rpms at high elevation (pivot weight for 7500 feet)

2018
FR 146, Summit 146
FR 154, Summit 154, 165
Same settings as 2019 except 2018 has High elevation primary spring PL/WH = 170/400 lbs

2017
Summit 154, 165
951 ramps low, 967 high
bl / yl primary spring low, pl / pl high
38mm pivot to 4000
33mm pivot 4k~8k
26mm pivot 8k+
Black secondary spring to 4000 feet
Blue secondary spring 4000+
40 helix
19:45 @ 112p chain (154)
21:51 @ 116p chain (165)

2017 high elevation spring was 170/350
2018 high elevation spring was 170/400
2019 high elevation spring now 150/350

__________________

Really good G4-850 and XM summit clutch kits

850 G4 Summit clutch kit index

Online Gear Calculator @ iBackshift
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Old 07-26-2018, 05:38 PM
IcutMetl IcutMetl is offline
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Quote:
Originally Posted by GSPLewie View Post
Not knocking this work, but is it really worth the extra $400 to upgrade a brand new sled?
Yes.
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Old 07-26-2018, 11:37 PM
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Quote:
Originally Posted by Dynamo^Joe View Post
Sorry im a bit late. Usually have these stock clutch settings by 2nd week of June, but i've been out of town working on my garage pad.


FR 146, Summit 146 x 850
990 ramps low, 965 ramps high
bl / yl primary spring low, bl / pl high
38mm pivot to 4000
33mm pivot 4k~8k
26mm pivot 8k+
Black secondary spring to 4000 feet
Blue secondary spring 4000+
42/38 helix
21-49 @ 114p chain

FR 154~165, Summit 154~165
990 ramps low, 965 ramps high
bl / yl primary spring low, bl / pl high
38mm pivot to 4000
33mm pivot 4k~8k
26mm pivot 8k+
Black secondary spring to 4000 feet
Blue secondary spring 4000+
40 helix
FR (Euro) 154 @ 21-49 @ 114p chain
Summit 154 @ 21-51 @ 116p chain
165's @ 21-53 @ 116p chain


Summit 175 x 850
990 ramps low, 965 ramps high
bl / yl primary spring low, bl / pl high
38mm pivot to 4000
33mm pivot 4k~8k
26mm pivot 8k+
Black secondary spring to 4000 feet
Blue secondary spring 4000+
40 helix
21-53 @ 116p chain


Clutch kits that are really great; quick and easy to tune available - About 3mph more track speed, repeatable. Engine braking really really strong, declutching at a low track speed.

https://www.ibackshift.com/comersus/...?idCategory=14


850 Blog (My ramblings)
https://www.ibackshift.com/article/8...summit-196.asp


I think I get to put together a 2019-850 x 154 x 3.0 next week some time; and get my head in there to see what's new under the hood.
But you have a big head. Not gonna fit.

Sent from my SM-G920W8 using Tapatalk
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