Question:
What are my options for new camshaft profiles?

Answer:
There are effectively 3 options when it comes to Hayabusa cams:
1. Regrind a standard cam profile, this reduces the size of the cam in order to increase the lift and duration. You would then have to run a thicker shim to take up this difference. You are also limited by how much material that it is possible to remove from the original cam in order to produce a larger profile. We produce 2 profile designs; the first only require a pair of standard Gen1 camshafts. The second larger profiles require either a pair of standard Gen1 inlet cams or a pair of standard Gen2 cams because these cams have more material.
2. Hard weld on to standard cams, this is not something that we do. The problem with this process is that the material can sometimes then come off the cam profile causing damage to the cam and valve train.
3. Use steel billets to grind fresh profiles, which allow within reason any profile to be ground. The limiting factors are as follows, the steel billets are of a similar hardness to the follower so to prevent the 2 components wearing each other away, we would use either a DLC coating on the cam profiles or the followers to prevent any chance of this happening, but this is extremely expensive. The next factor is that as you increase the lift of the cams, the springs need to be significantly increased in strength. This creates extra load on the valve train, chain, guides, etc and also reduces their life.

The choice is dictated by your budget and the life expectancy that you hope to achieve, so if you want to do a drag run and have to rebuilt it every few runs, then you got for the biggest cam. If you wish to do a hillclimb, you go for something milder and if you wish to do sprints or racing, you look at something milder again.