Question for SIP re HP4

I’ve ran an HP4 on P2 (standard barrel) for about the past year and then I start reading stuff about havin to alter the timin’

What alteration should it be and why ??

Scoot starts and runs fine, plug colours fine and no warnin literature accompanied the HP4 ???

Does it need altering (& whats the setting) or is this just hearsay ? [?[]

IF YOUVE BEEN RUNNING A YEAR ON IT, IT AINT BROKE? DONT FIX IT!!

exactly mate , and a load unecessary scaremongering made up by people who set there timing wrong in the 1st place !

Never touch a running systhem [:D]