There was not much I could find in advance about Fiji as a cycle touring destination, so here are 10 things about Fiji for cycle tourists that I gathered from my recent trip:
main road on Viti Levu is in good condition, all sealed and smooth
watch out for overtaker in front of you, they are not used to cyclists and heading straight towards you (leave the road then) and its left hand traffic
very friendly and chatty locals
very green, palm trees everywhere
always hot and humid
almost every village has a shop where you can buy water and sweets
plenty of fruit stalls alongside the road, fruits are so delicious over there
more horse riders than cyclists (take all your spare parts with you)
everyone speaks English well
not much of a place for wild camping, too bushy and all land is owned by someone, however you might be most welcome to stay with the locals