Hi all,
I am about to replace my OEM ignition system with an analogue PVL system on an air-cooled 500cc motocrosser (Yamaha WR500).
PVL recommend timing start at 2.2-2.4mm BTDC for open class machines, however standard OEM setting for my bike is 1.7mm BTDC.
Should I set to OEM or PVL measurements?