torque arm

Anyone know a good set up for the PC M8 for 0-3000 ft. elevation? Is a new torque arm/helix necessary or can you get away with just heavier weights (75g-80g) in the primary? Thanks for any suggestions

I'm rebuilding the motor for my 2004 RMK Vertical Edge 800 159", and was wondering about the torque arm and push arm available from SLP. I bought the sled with the wrecked motor this summer, and it looks like the PTO side exhaust manifold (SLP twins) gasket leaked on the bottom side, so the...