Cheers fer replying motoG
have factored in low temps, but during accurate tests, the tstat was uppenin at 60 deg, so am trying to get bike to stabilise at 75-80 deg by tstat, and also possible relocation of temp sender to gauge as it looks on wrong side of horizontal top outlet, so was wondering if it wasnt fully in flow till tstat opened and flow diverted to rad...not sure yet but gonna carry on in quest for decent temp