Your 18 CVO should have the 10 plate/1100n spring combo standard. Just need to change the springs.
Okay, that is good to know on the plates. I know it is a very week spring, much week then the factory clutch in the 13 CVO. My 13 I built the first time to 122 HP and 124 torque with no slip. When I went 117 with it, I had to do the heaviest spring and the VP-SDR cutch.
With just a Fullsac head pipe, fullsac 2.25 muffler cores and a good dyno tune with TTS tuner I have clutch slip at low RPM.
Before I do any more to the 18 I will be doing the VP-SDR with their heavy spring.
Suburban Speed (Suburban HD) has a drop in 124 kit so it will only be a matter of time....
http://www.suburbanharley.com/wisconsin-harley-davidson-kit--milwaukee-eight
I've been kicking around giving it a try. For me I'd just add the displacement and the best cams for my application. No head or TB work.
ea that has been out a few months. I keep watching for some Dyno runs with the 124. I have not seen any dyno sheets for M8 124 builds. T-man also has a 124 Kit and so does Fuel Moto. Suburban was first to market with it.
I to am kicking it around. I just want to see more dyno runs of 120/124 engines with different cams to see what will give me the Torque curve I want. I want big torque before 4000 RPM, that comes on real early. 140 square should be possible and very reliable, able to tour on.