Like most of you out there with the 825i, I to would like to lower the rpms of the motor and can't figure out what springs will work better to do this. I have found some info on the factory set up that may help someone on there search for the perfect set up. Chime in if this helps and let us know what works for you.
Factory primary clutch is made by Team Industries
--It is a Team Rapid Response and there are places that sell several different rates of springs
The OEM John Deere spring is M159961 (Black/with almond stripe)
--This crosses over to team p/n 1140-0418 or 210500-042218 which is a 42/204 spring...first number is pretension/second is full shift tension
example:
Pretension: The amount of force the spring takes to compress it to it’s installed length. For our purposes this is the lower of the 2 numbers that the springs will be listed as by the manufacturer. For instance a Polaris Black/Green (now just Black) is 120/340. The 120 number is the Pretension of the spring. For reference the installed length for a Polaris Primary clutch is 2.530”
Full Shift Tension: This is the amount of force the spring takes to collapse it to it’s length at full shift out. This is the second (higher) number listed by the manufacturer on most springs. For Reference the fully compressed length in a Polaris Primary clutch is 1.190”
I have played around with another spring weakening and shortening it slowly and did get it to lower rpms at 30mph by 600rpm but it was so light the belt grabbed at idle.
We may have to change the primary and secondary spring, and weights to achieve the desired outcome but im sure someone out there can help figure this out.
Here are some different part numbers of springs i found
Part #Description
1140-0419
COLOR: Red
COLOR (SECONDARY): Silver
MARKETING COLOR: Red/Silver/purple
DESCRIPTION: Force Lbs. @ 2.25"-1/141": 43/189
1140-0420
COLOR: Red
COLOR (SECONDARY): Gold
MARKETING COLOR: Red/gold
DESCRIPTION: Force Lbs. @ 2.25"-1/141": 55/188
1140-0421
COLOR: Red
COLOR (SECONDARY): Gold
MARKETING COLOR: Red/Gold/Black
DESCRIPTION: Force Lbs. @ 2.25"-1/141": 55/243
1140-0424
COLOR: Red
COLOR (SECONDARY): Purple
MARKETING COLOR: Red/purple
DESCRIPTION: Force Lbs. @ 2.25"-1/141": 65/151
1140-0425
COLOR: Red
COLOR (SECONDARY): White
MARKETING COLOR: Red/White/Black
DESCRIPTION: Force Lbs. @ 2.25"-1/141": 65/264
1140-0426
COLOR: Red
COLOR (SECONDARY): Green
MARKETING COLOR: Red/green/black
DESCRIPTION: Force Lbs. @ 2.25"-1/141": 75/280
1140-0427
COLOR: Red
COLOR (SECONDARY): Silver
MARKETING COLOR: Red/silver/Orange
DESCRIPTION: Force Lbs. @ 2.25"-1/141": 76/166
1140-0428
COLOR: Red
COLOR (SECONDARY): Gold
MARKETING COLOR: Red/gold/Silver
DESCRIPTION: Force Lbs. @ 2.25"-1/141": 105/277
Factory primary clutch is made by Team Industries
--It is a Team Rapid Response and there are places that sell several different rates of springs
The OEM John Deere spring is M159961 (Black/with almond stripe)
--This crosses over to team p/n 1140-0418 or 210500-042218 which is a 42/204 spring...first number is pretension/second is full shift tension
example:
Pretension: The amount of force the spring takes to compress it to it’s installed length. For our purposes this is the lower of the 2 numbers that the springs will be listed as by the manufacturer. For instance a Polaris Black/Green (now just Black) is 120/340. The 120 number is the Pretension of the spring. For reference the installed length for a Polaris Primary clutch is 2.530”
Full Shift Tension: This is the amount of force the spring takes to collapse it to it’s length at full shift out. This is the second (higher) number listed by the manufacturer on most springs. For Reference the fully compressed length in a Polaris Primary clutch is 1.190”
I have played around with another spring weakening and shortening it slowly and did get it to lower rpms at 30mph by 600rpm but it was so light the belt grabbed at idle.
We may have to change the primary and secondary spring, and weights to achieve the desired outcome but im sure someone out there can help figure this out.
Here are some different part numbers of springs i found
Part #Description
1140-0419
COLOR: Red
COLOR (SECONDARY): Silver
MARKETING COLOR: Red/Silver/purple
DESCRIPTION: Force Lbs. @ 2.25"-1/141": 43/189
1140-0420
COLOR: Red
COLOR (SECONDARY): Gold
MARKETING COLOR: Red/gold
DESCRIPTION: Force Lbs. @ 2.25"-1/141": 55/188
1140-0421
COLOR: Red
COLOR (SECONDARY): Gold
MARKETING COLOR: Red/Gold/Black
DESCRIPTION: Force Lbs. @ 2.25"-1/141": 55/243
1140-0424
COLOR: Red
COLOR (SECONDARY): Purple
MARKETING COLOR: Red/purple
DESCRIPTION: Force Lbs. @ 2.25"-1/141": 65/151
1140-0425
COLOR: Red
COLOR (SECONDARY): White
MARKETING COLOR: Red/White/Black
DESCRIPTION: Force Lbs. @ 2.25"-1/141": 65/264
1140-0426
COLOR: Red
COLOR (SECONDARY): Green
MARKETING COLOR: Red/green/black
DESCRIPTION: Force Lbs. @ 2.25"-1/141": 75/280
1140-0427
COLOR: Red
COLOR (SECONDARY): Silver
MARKETING COLOR: Red/silver/Orange
DESCRIPTION: Force Lbs. @ 2.25"-1/141": 76/166
1140-0428
COLOR: Red
COLOR (SECONDARY): Gold
MARKETING COLOR: Red/gold/Silver
DESCRIPTION: Force Lbs. @ 2.25"-1/141": 105/277