I've been testing my xtz660's electrics to try and solve a spark issue i'm having, got as far as the diode and before i could test it I stepped on it and broke it.... oops. now I've not been able to find any information as to what diode I need to buy to replace it. the old diode had s3v03 written on it but I know next to nothing about diodes and what this signifies, just how to test the little buggers.

Maplins have plenty of diodes but nothing that I can see matching this code. The service manual has no information I can find on what size/voltage/rating etc I need and I don't want to put an overpowered or underpowered diode in place.

Any help from anyone would be great

Hi Andrew and welcome to the YOC , it's usual to do an INTRO in the new members section before you ask a "how do I fix my bike" question. Someone on here will no doubt be able help out but we get a LOT of one hit wonders and it gets tiring giving advice and then NOTHING from the person who's asking, not even a "THANKS" most of the time. We're strangers to you and if you talk to strangers then you usually say "Hi" first.