FSR515 engine warm up feature?

[GooseMan]

Hey guys new here and to Gassers, just got a fsr515 with a cracked cylinder and leaking head gasket. Rebuilt the entire top end with OEM parts and it runs a dream, real happy with it. Anyway when I brought it I was told it had a warm up feature so that you could not use the clutch until the engine is warm.

So I have perfect clutch control when the engine is off, I then start it and the lever goes loose and does nothing, I let it warm up and after quite some time it reaches around about 88C and the clutch then comes into life, I will then take off and the airflow cools the engine a bit and I don't have a clutch again until it gets back to operating temp and then it is fine but I can't stop until then.

Anyway, maybe I am searching the wrong thing but I can't find any info on this at all. I was wondering if it can be adjusted or disables, and if anyone could tell me how it works? I am a diesel mechanic so you don't have to put it into to laymen terms lol.