8,000'-10,000'
We run 10/60's in the primary.
And the Black/Purple spring in the secondary.
And the following is also what we do on the secondary. This advice came from TEAM.
The SLP Helix/Spring Shim will help maintain peak RPM riding at extreme
elevations (8,000 ft. and above). This shim spaces the hub of the clutch in
0.070" which raises the spring pre-load and rate by 8 to 10 pounds. It also
shortens the length of the initial (steeper) angle on a multi-angle helix
(ie. 58/38.46 with a shim would become a 58/38.40). This improves backshift
characteristics at high elevations in very steep conditions. It is
especially beneficial when using long, aggressive tracks.
We run 10/60's in the primary.
And the Black/Purple spring in the secondary.
And the following is also what we do on the secondary. This advice came from TEAM.
The SLP Helix/Spring Shim will help maintain peak RPM riding at extreme
elevations (8,000 ft. and above). This shim spaces the hub of the clutch in
0.070" which raises the spring pre-load and rate by 8 to 10 pounds. It also
shortens the length of the initial (steeper) angle on a multi-angle helix
(ie. 58/38.46 with a shim would become a 58/38.40). This improves backshift
characteristics at high elevations in very steep conditions. It is
especially beneficial when using long, aggressive tracks.