Avg Compression for kawasaki FX850V

[Robertk124]

Hi guys,
Haven't seen many forums related to the fx850v reliability wise, I was just wondering if anyone here has this engine and has done a compression test. I did one on my Z950M with 1160 hours and was getting 90psi +/- with the engine warm. There is a lot of buildup on the piston as well and was wondering if there is a way to remove that without the removal of the heads.

 

[mini14]

i have a 10 year old fx691v with 4500hrs still runs great, a little smoke on startup. You are supposed to pull heads decarbon and lap valves every so often, i never have.