Hi Max and NormK, This is a good discussion regarding the throttle cable stucked from off position. Redesigning and manufacturing a new product is always best to consider improvement and fix especially for the cam and not just exactly mirror the product with no difference. I'm always wanted to get a new cam manufactured but needs more information/feedback or a modified sample and how does it affect the engine performance or provide a solution. Giving the manufacturer the incorrect is very costly on tooling and molding. I have seen this throttle stucked and fixed them by filing the kill switch hump to make it more curved then plateau. This throttle stucked issue is not the lifter. To prove this, completely remove or pull out the kill switch contact from the cam and try if the throttle stucked issue still happening.

Cheers,
CM